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Naddik [55]
3 years ago
6

Which of the following cells and their functions are correctly matched?

Medicine
1 answer:
KatRina [158]3 years ago
5 0

Answer:

b. Melanocytes-protect cells in the dermis from damaging effects of sun's rays

Explanation:

Keratinocytes are responsible for the forming tight junctions with nerves of skin. They keep Langerhans cells of epidermis and lymphocytes of dermis in place.

<u>(Option A is incorrect). </u>

Melanocytes are the cells of the neural crest origin. In epidermis, they form association closely with the keratinocytes via dendrites. Melanocytes are responsible in skin pigmentation.

<u>(Option B is correct). </u>

Basal cells are undifferentiated and proliferating cells. For the normal skin homeostasis, the daughter cells from basal cell layer migrate upward and begin process of the differentiation.

<u>(Option C is incorrect). </u>

Merkel cells are located in basal epidermal layer of skin. Merkel cells are  essential for the light touch sensation and are found in the skin of vertebrates.

<u>(Option D is incorrect). </u>

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What is the crude mortality rate for Regionville? Regionville is a community of 100,000 persons. During 1985 there were 1,000 de
uysha [10]

Answer:

10 per 1,000.

Explanation:

The death rate and birth rate affects the population dynamics of the particular area. The birth rate increases  the population size whereas the death rate decreases the population size.

The death rate of a population can be calculated by the following formula:

Crude death rate = total death/ total population

Here, total death = 1,000 and total population = 100,000.

Crude death rate = 1,000/ 100,000 = 0.01 or  10 per 1,000.

Thus, the correct answer is option (c).

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Any help on 16&amp;17 pl
egoroff_w [7]
16; D. all of the above

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2 years ago
Explain how the structure of each of the following tissues follows its function:
melisa1 [442]

Answer:

The function of the following tissues are as follows:

Stratified squamous keratinized epithelium: These tissues cover the surface of the body and present at hair and skin. These tissues are keratinized to protect the surface of body from abrasion.

Simple squamous epithelium:  This tissue contain the single layer of flat cells. These tissues are thin and has the ability to pass some selected molecules through the cells.

Hyaline cartilage: Hyaline cartilage contains large amount of collagen that provides support and flexibility to the tissues.

Bone: Bones are made up of calcified material, phosphates and various inorganic ions. Bones provide stiffness and supports the weight of muscles in our body.

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2 years ago
Why is DNA considered a biomolecule.
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Explanation:

i know because it easy but its problly

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