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LekaFEV [45]
3 years ago
12

In some instances, the levels of LDL cholesterol exceed the ability of the body to maintain homeostasis, and as a result, the ex

cess material accumulates into fatty deposits that harden into plaques. Arrange in the correct order the sequence of events that leads to this condition, known as atherosclerosis:
a. The plaques harden, blocking the flow of blood in major arteries.
b. White blood cells become engorged with fatty deposits.
c. Excess LDL cholesterol accumulates in the interior of arterial walls.
d. Macrophages are drawn to this site.
Biology
1 answer:
GREYUIT [131]3 years ago
3 0

Atherosclerosis

Explanation:

Correct order of the sequence of events that leads to atherosclerosis is:

c, d, b, a

Development of atherosclerosis is caused by a high concentration of LDL‐cholesterol in the blood, and lowering the level of LDL‐cholesterol reverses atherosclerosis thus preventing cardiovascular disease

Cholesterol is the key component of arterial plaques which gave rise to the cholesterol hypothesis for the pathogenesis of atherosclerosis

Population studies have shown that elevated levels of both LDL cholesterol and apolipoprotein B (apoB) 100, which is the main structural protein of LDL, are directly associated with risk for atherosclerotic cardiovascular events

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Hypothesize what potential impact a mutated EGFR allele will have on a cell. Give one possible impact and explain your answer.
NemiM [27]

Answer/Explanation:

EGFR stands for epidermal growth factor receptor. It is a transmembrane protein acting as a tyrosine kinase receptor for epidermal growth factor ligands, which are associated with promoting cell division and proliferation. When epidermal growth factor binds to the receptor, it becomes activated and undergoes dimerization and autophosphorylation.

A mutation could occur making the receptor overactive. That is, it does not require ligand binding to become activated, meaning it is always in an "on" state. This would lead to uncontrolled proliferation, a hallmark of cancer.

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Explain the benefit of an increase in capillary-action to a hockey player.
Nesterboy [21]

Answer:

Explanation:

high muscle capillary density means a large muscle-to-blood exchange surface area, short oxygen diffusion distance, and high red blood cell mean transit time.Capillary action is important for moving water (and all of the things that are dissolved in it) around. It is defined as the movement of water within the spaces of a porous material due to the forces of adhesion, cohesion, and surface tension.

7 0
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scientist have discovered several species of insect that are contain the DNA sequence ATTACGCGATC on their second chromosome wha
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B. common ancestry among organisms.
6 0
2 years ago
What two species are most closely related from the evolutionary tree
Vedmedyk [2.9K]

Answer:

Species a and c

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The species c, was more closely related to species a than species b was. This is because species a and c just recently evolved into different species in evolutionary history.

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Forms of the Ras protein found in tumors usually cause which of the following events to occur? excessive cell division decreased
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The Ras protein found in tumors usually cause which of the following events to occur excessive cell division.

<h3>How does Ras oncogene contribute to cancer?</h3>

Ras genes codes for proteins that can drive cancer when mutated.

All Ras proteins are GTPases which work as molecular regulators in the cell, controlling signaling pathways and other interactions.

Thus, option "A" is correct.

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