Define accommodation. which part of the eye serves this function? how does its shape change with the distance between you and the object you are looking at?

Answers

Answer 1
Accommodation is the ability in which the eye changes its focus from viewing distant objects and then near objects and vice-versa.

The optics and the focal length of the eye are adjusted such that the focus of the retina is on the object even if the distance varies from the eye. It is like a reflux which can be controlled consciously. The process is a consequence of the changes in the zonal tension which is induced by the contractions of the ciliary muscles.

According to the Helmholtz theory of mechanism, the ciliary muscles that are arranged circularly in the eye relax while viewing a far object. This causes the suspensory ligaments and lens zonules to pull the lens, which flattens it.

When a near object is being viewed, the ciliary muscles contract and loosen up the lens zonules causing the lens to form a thick convex.

Related Questions

What is significant about the symbiosis between mycorrhizae and the plants known as ghost pipe and garlic mustard?

Answers

The plants are part of a network of parasites, sucking nutrients from the mycorrhizae that were absorbed from a nearby photosynthetic plant.

Final answer:

The symbiosis between mycorrhizae and plants like ghost pipe and garlic mustard is essential for nutrient acquisition and plant growth, with the ghost pipe relying completely on this association due to its lack of chlorophyll, and garlic mustard potentially disrupting mycorrhizal relations of native plants in invaded areas.

Explanation:

The symbiosis between mycorrhizae and plants like ghost pipe and garlic mustard is significant because it represents a mutualistic relationship that is crucial for the survival and growth of these plants. Mycorrhizae are a type of fungus that form associations with plant roots, enhancing water and mineral nutrient absorption. Through this relationship, the plant gains improved access to nutrients, particularly in nutrient-poor soils, while the fungus receives sugars and other photosynthetic products from the plant.

The ghost pipe, also known as Monotropa uniflora, is especially interesting because it lacks chlorophyll and so depends entirely on the mycorrhizal relationship for its nutrition, drawing upon the nutrient reserves of the mycorrhizal network. Garlic mustard, on the other hand, may affect the mycorrhizal associations of native plants negatively when it invades an area, thereby impacting native plant communities and ecosystem dynamics. Understanding these interactions is critical for conservation and management of native plant species and their habitats.

What factors might contribute to global sea level rise?

A) melting of glaciers and ice caps
B) increase in precipitation
C) increase in density
D) increase in salinity
E) expansion of water volume

Answers

I don't really agree with the whole idea of global warming, but the only question that makes the most sense (besides increase in salinity) is A. melting of glaciers and ice caps. Reason being: precipitation generally originates from oceans, and the ocean can't rise from raining with it's own water, increase in water density is (as far as I know) impossible, and expansion of water volume is, basically, just re-wording the phrase "sea level rising" (volume means taking up more space).
Final answer:

Global sea level rise is primarily caused by the melting of glaciers and ice caps, and the thermal expansion of ocean water as temperatures rise. Factors like land changes and local sea level influences also play a role.

Explanation:

Factors that contribute to global sea level rise include melting of glaciers and ice caps, thermal expansion of water as ocean temperatures rise, and the addition of water from rivers, lakes, and sea ice melting. The melting glaciers and ice caps provide a significant input of liquid water into the ocean, previously stored as ice. Thermal expansion occurs because water volume expands as it warms, causing the ocean to occupy a larger volume and leading to higher sea levels. Additionally, factors such as land elevation changes, local currents, winds, salinity, and water temperatures can influence relative sea level rise in specific regions.



It is important to note that while an increase in precipitation adds more water to the system, it does not directly cause sea level rise unless it is a long-term change that leads to more water running off into the oceans than being stored on land as ice or in reservoirs. While changes in water density and salinity can affect ocean currents and local sea levels, the primary drivers of overall global sea level rise are the melting of ice and the expansion of water volume due to temperature increases.

What is scientific question ?

Answers

Do you mean what is a scientific question? if so it is a hypothesis.
What is *a scientific question? A scientific question is a question that can lead to a hypothesis and can help you answer the reason of an observation.

The ______ pyramid shows a decrease moving up trophic levels

Answers

The energy pyramid shows a decrease moving up trophic levels. For example, when a herbivore eats a plant, it only gets a part of the plant energy, so the energy taken by the herbivore will be lesser. The same thing also happens when the carnivore animal eats herbivore animals. 

A nurse discusses ginger root with a pregnant patient who asks about the risks and benefits of using ginger root

Answers

A nurse discusses ginger root with a pregnant patient who asks about the risks and benefits of using ginger root to treat morning sickness in pregnancy.
Morning sickness is very common in pregnancy and most women have this as early symptoms to detect pregnancy.
Ginger could reduce nausea and vomiting in some pregnant ladies.

Pregnant women should consult a healthcare provider before using ginger root or any dietary supplements to understand the risks and benefits and ensure the safety of both mother and baby.

When considering the use of ginger root during pregnancy, it is important to discuss the potential risks and benefits with a healthcare provider. Ginger is commonly used to help settle the stomach and is available in various forms such as capsules, candies, and tea. Real ginger ale might also provide similar benefits. However, most dietary supplements, including ginger, have not been rigorously tested in pregnant women, nursing mothers, or children. Therefore, a pregnant patient should consult with a healthcare professional before using any dietary supplements to avoid possible health risks to the fetus or the mother.

Pregnant women are advised to be cautious with dietary and herbal supplements due to potential impacts on fetal growth and development and the overall health of the mother. It's crucial to consider medical conditions, such as hemochromatosis, that could interact negatively with supplements like ginger. Moreover, healthcare providers can provide guidance on proper dosage and usage, avoiding contaminants, and choosing high-quality products.

What are some steps that scientists can take in designing an experiment to avoid false negatives?

Answers

False negative is a condition when you got a negative result for a specimen which was positive. To prevent false negative occur, first you need to use golden standard test or a test with high specificity. You can do multiple tests to ensure the specimen is negative and using a positive control to make sure the reagent is still working fine. 

If all the droplets were the same size, which would fall most slowly through the apparatus?

Answers

If all the droplets were the same size, the droplet with the smallest charge would fall most slowly through the apparatus. Basically, buoyancy is the same for all droplets but the electrical force would be different for each. The higher the electrical force the greater is the gravitational pull towards that droplet. Therefore, the droplet that has the smallest charge would drop most slowly.

Scientists predict that global warming could cause _____.

Answers

Scientists predict that global warming could cause extensive environmental and societal impacts, including more extreme weather, loss of biodiversity, rising sea levels, and increased human violence due to resource shortages.

Scientists predict that global warming could cause a wide array of impacts. These include the continued retreat of glaciers, greater weather extremes, and the expansion of deserts. Other significant changes forecasted due to global warming are shifts toward the poles in natural habitats, loss of biodiversity, modifications in food production, and rising sea levels, leading to displacements of human populations. Additionally, there may be increases in human violence because of exacerbated environmental stresses, such as water shortages and reduced agricultural yields.

Specifically, future global warming could result in more powerful storms, droughts, and altered precipitation patterns which can affect agricultural zones and cause food shortages. Severe hurricanes and tornadoes are also likely to increase due to more solar energy in the oceans and atmosphere. The melting of land glaciers, particularly the Greenland ice sheet, contributes to rising sea levels, which is a severe threat to coastal communities.

In the long term, warming greater than 5°C could potentially lead to an ice-free Earth, causing drastic sea-level rises. Such outcomes can pose serious threats to food and water resources, affecting the survival and habitation of billions of people. Overall, while there may be some isolated benefits to milder climates in certain regions, the net effect of global warming is widely considered detrimental, and potentially catastrophic, to our planet's ecosystems and human societies.

A client who has sustained multiple fractures of the left leg is in skeletal traction. the nurse has obtained an overhead trapeze to improve the client’s bed mobility. to which high-risk area must the nurse pay particular attention during assessment for indications of pressure and skin breakdown?

Answers

back of the left heel

Final answer:

In a patient with skeletal traction using an overhead trapeze, the nurse must closely monitor for pressure sores on bony areas in frequent contact with the bed or traction equipment.

Explanation:

When caring for a client in skeletal traction, a nurse needs to monitor for pressure sores, also known as decubitus ulcers or bedsores. These sores occur from constant, unrelieved pressure on bony areas of the body, leading to reduced blood flow and potential tissue death. In the case of a patient with skeletal traction who is using an overhead trapeze to improve bed mobility, the nurse must pay close attention to the areas of the body that come into frequent contact with the bed or traction equipment. These high-risk areas typically include the coccyx, sacrum, heels, and elbows. Regular assessment and repositioning of the patient, as well as the use of supportive devices or cushions, are essential to prevent the development of pressure sores.

Surface barriers, such as cutaneous and mucous membranes, serve the immune system as the

Answers

first line of defense

has anyone done the 2.03 assignment?

Answers

for which grade? and which class?
i have whats the problem? 

What type of map is best suited for maritime navigation

Answers

the best map suited for maritime navigation is the mercator projection

The unregulated use of fertilizers has actually benefited freshwater life zones.

Answers

If this is a true or false question I think the answer is false

The right answer is false

In the fields, excessive fertilizer use can lead to soil depletion due to overexploitation.

The abuse of nitrogen-based synthetic (or industrial) fertilizers causes very dangerous environmental problems such as air or water pollution.

Most fields grown in industrialized countries receive more nitrogen than they can use. This is a terrible effect on the nitrogen cycle which is overloaded. Although nitrogen is a vital and essential element of living ecosystems and is the first nutrient for all green plants, nitrogen overload and other chemical elements can lead to their death.

When an excess of nitrates seeps into the water, it can affect our ecosystem. High concentrations of nutrients are responsible for abundant "blooms" of developing algae. These algal blooms consume a lot of oxygen and block the sun's light, causing the death of other organisms. This process is called eutrophication.

Sand that extends from a coast into open water is called a barrier spit.
a. True
b. False

Answers

It is True - Sand that extends from a coast into open water is called a barrier spit.

Barrier spits are formed when there is a deposit on the shoreline due to the lateral movement of water.

The waves are known to hit the shoreline at a particular angle which cause the lateral movement of water accompanied with the sedimentation along the coastline in the direction of the wave motion.

Which is a biotic component of a marine ecosystem? detritus on the ocean floor the oxygen concentration of the water rocks on the ocean floor?

Answers

I think it is Detritus on the ocean floor.

Answer:

B) Detritus on the bottom of the ocean

Explanation:

How does the change in concentration represent biomagnification?

Answers

The change of concentration represents bioaccumulation. Biomaccumulation is also known for biological accumulation which means an increase of toxic substances that occurs in the food chain and often comes from substances with a contaminated environment. The food of the organisms that they consume contains chemicals mostly form the industry or pesticides such as polychlorinated biphenyls (PCBs), pesticides such as DDT, mercury and such. When the organism in higher food chain consume the organism or product that contains the toxic chemicals, the chemicals gradually become concentrated in the food chain. And overtime as these are amassed in the higher organism, they will be the ones who will accumulate the most of the chemicals. The result may be deadly.

Answer:

       First, biomagnification happens when for example, there's a certain quantity of mercury in a lake and the fish gets contaminated.

Explanation:

       After that, imagine that this fish is eaten by a bigger fish, a different species, with a little bit of mercury inside of it too, but it has a concentration. With that, both concentrations are on the big fish now, and after that, the fish is caught by a human, and the human eats it all, but the human has a concentration os mercury inside its body too, and the three concentrations are now in the human, and so on. This change in concentration is called biomagnification.

​unlike most of the disorders of childhood and adolescence, the causes of eating disorders are disproportionately related to ____ influences.

Answers

Final answer:

Eating disorders like anorexia and bulimia nervosa, unlike other disorders of childhood and adolescence, are strongly influenced by cultural factors. Especially prevalent among White Western females aged 15-19, these disorders connect to societal values around thinness, portrayed in media and fashion. Although genetics may predispose some individuals to these disorders, the contribution of cultural influences is significant.

Explanation:

Unlike most of the disorders of childhood and adolescence, the causes of eating disorders are disproportionately related to cultural influences. Both anorexia and bulimia nervosa occur across cultures, but White females from Western societies, mainly aged 15-19, are much more prone to them. These disorders are linked strongly to a thin ideal prevalent in popular media and fashion industries in these societies.

Eating disorders also have a genetic component, suggesting that some individuals may be predisposed to these disorders. Hence it's a combination of genetic predisposition and social pressures emphasizing thinness that contribute largely to the development of eating disorders. While biological factors normally play a vital role in other childhood and adolescence disorders, cultural factors play a key role in eating disorders.

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Nicotine ultimately stimulates __________, which are implicated in the reinforcing effects of smoking. muscarinic receptors dopamine receptors gaba receptors serotonin receptors

Answers

The answer to this problem is "Dopamine Receptors". Hence, when Nicotine ultimately stimulates dopamine neurons, which are the implicated in the reinforcing and pushing the effects of smoking habits. The dopamine which is chemically released by the neurons or nerve cells and it gives a signal to other neighboring nerve cells.

A cell in the human nervous system whose primary function is to help form myelin and the blood-brain barrier, respond to injury, remove debris, and enhance learning and memory is called ano _________ cell.

Answers

The name of the cell is GLIAL CELL. The glial cells surround neurons of both the central nervous system and the peripheral nervous system and provide support and insulation for them. They are also involved in maintenance of homeostasis and in production of myelin.

What are the typical first responses to change that most people undergo as part of the natural “grieving cycle”?

Answers

A natural response to change would be CONFUSION - FEAR - RESISTANCE. For example, if someone's typical work routine is changed due to new rules at work, they could feel frustrated because they have to learn a new way of doing something. It might make them feel like they don't know how to do their job properly, even if they've been doing it for quite some time. Eventually, people adapt to a new way of doing things (acceptance) and it doesn't frustrate them anymore.

Which trna anticodon(s) could decode the mrna codon cag (recall that codons are always written in the 5'—>3' direction and anticodons are written in the 3'—>5' direction)?

Answers

GUU or GUC can decode the mrna codon cag (recall that codons are always written in the 5'—>3' direction and anticodons are written in the 3'—>5' direction).
Codon is located on the mRNA molecule and anti-codon is located on the tRNA molecule. Codon is actually a sequence of three nucleotides, which specifies one amino acid in the chain of polypeptide.
Final answer:

The tRNA anticodon that can decode the mRNA codon 'CAG' is 'GUC' as it is complementary to the mRNA codon.

Explanation:

The mRNA codon 'CAG' would be decoded in the process of protein synthesis by a tRNA anticodon which is complementary to it. Since in RNA, Adenine (A) pairs with Uracil (U) and Cytosine (C) pairs with Guanine (G), the anticodon that matches with the 'CAG' codon will be 'GUC'. Thus, the tRNA anticodon that can decode the mRNA codon 'CAG' is 'GUC'.

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the simplest group of more than one kind of organism in the biosphere is

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The simplest grouping of more than one kind of organism in the biosphere is a community.

A 40-year-old female is scheduled for a routine screening baseline bilateral mammogram with computer-aided detection (cad). what are the cpt® and icd-10-cm codes reported?

Answers

The CPT and ICD-10 code will be 77067 for bilateral mammogram with CAD and Z12.31 for encounter for screening mammogram for malignant neoplasm of breast.
CPT is a code that used for identifying a treatment. It's a bit different with ICD-10 which was coding diagnosis of the patient.

Imagine that a researcher has found an unusual cell that seems to be unable to replicate its dna. the problem is most likely linked to which phase of the cell cycle?

Answers

The problem is most likely linked to the S phase of inter phase of the cell cycle when DNA is replicated, the DNA stays during the G2 phase. The S phase or the synthesis phase of the cell cycle when the DNA packaged into chromosomes is replicated. This event is an important stage of the cell cycle because replication allow for each cell created by the cell division to have the similar genetic makeup. All through S phase a number of events added to chromosomes replication take place. Cell growth endures through the S phase as does the amount of synthesis of a number of proteins and enzymes that are elaborate in DNA synthesis. Once done the cell comprises twice its normal number of chromosomes and becomes prepared to pass in the phase called G2 

What scientist is credited with proving that genes are located on chromosomes?

Answers

There are many answers to this but I can narrow it down to two.
Wilhelm Roux was the one who officially speculated that the chromosomes was the carriers of inheritance. 
BUT proving it is another story
Thomas Hunt Morgan showed that genes reside in specific chromosomes. He was able to map the fruit fly's chromosomal map.

Mercury is not readily excreted; it is stored in mammalian body tissues. this is best described as ________.

Answers

Bioaccumulation is the process of heavy metals being stored in animal tissues. Not only due heavy metals build up in animal tissues but pesticides and other toxins as well. Bioaccumulation is basically the physiological effect of animals absorbing substances at a faster rate than which the substance can be removed from the body by either catabolism or excretion.

Which type of muscle is paralyzed when its nerve supply is absent?

A. Striated involuntary muscle
B. Nonstriated involuntary muscle
C. Striated voluntary muscle
D. Nonstriated voluntary muscle

Answers

The type of muscle that is paralyzed when its nerve supply is absent is the Striated involuntary muscle. The answer is letter A. Without this muscle, the nerve supply is stopped and become paralyze. Contraction of this muscle requires nerves and without the nerve supply, the muscles will not contract and the cells will die. Muscles that goes like this tends to lose it tone and becomes flaccid and the whole muscle becomes small.

Answer:

C. Striated voluntary muscle

Explanation:

Striated voluntary muscles are the skeletal muscles that are responsible for the voluntary muscular movements that take place in the body.When the body becomes paralyzed than a person loose his/her ability to utilize this motor muscles as it lacks nerve supply due to some injury. Therefore the muscle that is affected is the striated voluntary muscles.

When the lateral hypothalamus is destroyed, animals will _____?

Answers

When the lateral hypothalamus is destroyed, animals will stop eating and should fed forcefully. The hypothalamus contains two portions that would function to control eating and hunger. It is the Ventromedial Nuclei that is responsible for signalling when to stop eating while the lateral hypothalamus signals when to start eating. When this part is damaged, it is clear that the body could not feel or know when to eat. This part of the hypothalamus consists of primary orexinergic nucleus that is projected over the nervous system. These neurons aids in a number of physical and cognitive processes like feeding behavior.

Animal behavior researchers often refer to an activity associated with punishment or reward as a/an

Answers

Animal behavior researchers often refer to an activity associated with punishment or reward as an operant. The basis for training animals is the operant conditioning. It is a learning process where the animal would learn base from its behavior as it responds to its environment. In this type of learning, the behavior is either increased or decreased by the results that follows the action. It uses rewards and punishments in order to associate with the behavior. For instance, you are trying to teach your dog to fetch an object, if he succeeds in fetching the object, then you give your dog a treat. The dog would think that what it is doing is good and that it would get a reward from it so it would start learning the behavior.

Answer:

The answer is Operant Conditioning

Hope this helps! :)

True or false: routes of exposure to chemicals are breathing, skin/eye contact, and swallowing.

Answers

Routes of exposure can be all of these things, true.
True

Hope this helps : )
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