1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mariarad [96]
3 years ago
13

What is the connection between the liver (organ), UV radiation (sunlight), and bone tissue? I need something with more informati

on for an essay
Biology
1 answer:
joja [24]3 years ago
5 0
The connection between them is Vitamin D.

Vitamin D can be obtained from food and supplements, or synthesized by our bodies when we receive UV radiation in our skin, which is our major source. However, this vitamin comes <span>inactivated</span> and the only way to activate it is through enzymatic conversion (hydroxylation) in the liver and later in the kidneys.

 This vitamin is necessary in the intestines because allows calcium and phosphorus to be observed, leading to normal growth and development of bones and teeth. Without enough vit D, bones become fragile, causing osteoporosis.

You might be interested in
Why would a third-degree burn be less painful than a first- or second-degree burn involving the same body area?
Irina18 [472]
A third-degree burn would be less painful than a first- or second-degree burn involving the same body area because of the destruction of underlying pain receptors.
Nerve endings are destroyed in third-degree burns, which means that a person can no longer feel pain in that particular spot on the body. Third-degree burns are the most severe ones and cannot be treated easily - usually skin grafting or synthetic skin has to be used to replace the burnt skin.
6 0
2 years ago
Some types of pollution are hard to
Zanzabum
The answer is the first one ( True )
3 0
3 years ago
Help plz!!! ASAP!!! *BRAINLY*
yarga [219]
B is the correct answer sir
4 0
2 years ago
Cell 1 contains 46 chromosomes. How many chromosomes will ther be in cell 10
Alina [70]
Cell ten will have 460 chromosomes
8 0
3 years ago
Read 2 more answers
PUNTOS POSIB!
Sindrei [870]

Aim

When dividing the world into zoogeographical regions, Alfred Russel Wallace stipulated a set of criteria by which regions should be determined, foremost the use of generic rather than species distributions. Yet, recent updates of Wallace's scheme have not followed his reasoning, probably explaining in part the discrepancies found. Using a recently developed quantitative method, we evaluated the world's zoogeographical regions following his criteria as closely as possible.

Location

Global.

Methods

We subjected presence–absence data from range maps of birds, mammals and amphibians to an innovative clustering algorithm, affinity propagation. We used genera as our taxonomic rank, although species and familial ranks were also assessed, to evaluate how divergence from Wallace's criteria influences the results. We also accepted Wallace's argument that bats and migratory birds should be excluded (although he was contradictory about the birds) and devised a procedure to determine the optimal number of regions to eliminate subjectivity in delimiting the number of regions.

Results

Regions attained using genera (eight for mammals and birds and six for amphibians) strongly coincided with the regions proposed by Wallace. The regions for amphibians were nearly identical to Wallace's scheme, whereas we obtained two new ‘regions’ for mammals and two for birds that largely coincide with Wallace's subregions. As argued by Wallace, there are strong reasons not to consider these as being equivalent to the six main regions. Species distributions generated many small regions related to contemporary climate and vegetation patterns, whereas at the familial rank regions were very broad. The differences between our generic maps and Wallace's all involve areas which he identified as being uncertain in his regionalization.

Main conclusions

Despite more than 135 years of additional knowledge of distributions, the shuffling of generic concepts, and the development of computers and complex analytical techniques, Wallace's zoogeographical regions appear to be no less valid than they were when he proposed them. Recent studies re‐evaluating Wallace's scheme should not be considered updates as such because they have not followed Wallace's reasoning, and all computer‐based analyses, including this one, are subject to the vagaries of the particular methods used.

7 0
2 years ago
Other questions:
  • How should Meredith make her model of the rock?
    14·2 answers
  • Cancer occurs when cell division becomes uncontrolled. What is one factor that can cause the cell cycle to lose control
    9·1 answer
  • From the surface of the Earth to about __________ (9 miles) above the surface
    13·1 answer
  • The phenotype of an organism
    9·1 answer
  • Why would competition be considered a limiting factor within an ecosystem?
    14·2 answers
  • Which statement is NOT true concerning setting up an experimental design
    15·1 answer
  • For a substance to change from a liquid to a solid what must happen to its particles?
    5·2 answers
  • William is interested in exercising more, but does not feel he has the time. Write a short response explaining how he can find t
    9·1 answer
  • Seasonal wildfires often destroy a large areas of vegetation in western states, Such as California and Arizona. What type of veg
    11·2 answers
  • How tendonitis affect homeostasis? Include body systems that are affected?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!