Klesath BIO 245 Blood vessels Test 2 Questions and Correct Answers/ Latest Update / Already Graded

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Klesath BIO 245 Blood vessels Test 2
Questions and Correct Answers/ Latest
Update / Already Graded
Aneurysm

Ans: part of arterial wall thins and balloons out making the wall
prone to rupture


Athersclerosis

Ans: "Hardening" of the arteries (elastic and muscular) results
from plaques which thicken the interior walls and narrow the
lumen


Myogenic response

Ans: smooth muscle in artery/arteriole wall responds to
changes in blood pressure to keep local flow relatively constant


Vasoconstriction

Ans: Increased MP


Vasodilation


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Ans: decreased BP


Vasodilators

Ans: dilate arterioles and relax precapillary sphincters
-increase flow into capillary beds
-increase in carbon dioxide, body temperature, nitric oxide,
ADP


Vasoconstrictors

Ans: constrict arterioles and cause contraction of precapillary
sphincters
-decrease flow into capillary beds
-increase in oxygen, sympathetic tone, Angiotensin II, ADH


Blood Pressure

Ans: is the force of blood against vessel wall


Mean Arterial Pressure (MAP)

Ans: is the average arterial blood pressure across the entire
cardiac cycle in which the diastole lasts longer
=diastolic pressure +1/3 pulse pressure

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