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Chapter 19 Quizes
| Question | Answer |
|---|---|
| During pulmonary circulation blood leaves the: | right ventricle and moves to the lungs. |
| During systemic circulation blood leaves the: | left ventricle and goes directly to the aorta. |
| The endothelium is composed of: | simple squamous epithelium. |
| The inferior vena cava brings blood from the lower regions of the body and empties into the: | right atrium. |
| Which is the correct sequence of layers in the vessel wall from outside to inside? | Tunica externa, tunica media, tunica interna |
| The major long-term mechanism of blood pressure control is provided by the: | kidneys. |
| Exchange of gases and nutrients occurs by diffusion between the: | capillaries and tissue cells. |
| Any condition in which blood vessels are inadequately filled and blood cannot circulate normally is called: | circulatory shock. |
| Reduction in lumen diameter of a blood vessel as the smooth muscle contracts is known as: | vasoconstriction. |
| The only vessels that provide direct access to nearly every cell in the body are the: | capillaries. |
| ____________ regulates blood flow at the entrance to each true capillary? | Precapillary sphincter |
| Loss of vasomotor tone resulting in a huge drop in peripheral resistance is known as: | vascular shock. |
| ____________ branches to form the common hepatic artery, left gastric artery, and splenic artery? | Celiac trunk |
| ____ _______ vein is the longest in the body? | Great saphenous vein |
| ___________ of an artery wall is regulated by the sympathetic nervous system and many hormones? | Middle layer |
| _______________ have the thickest tunica media of all vessels? | Distributing arteries |
| _____________ can compete with plasminogen but cannot dissolve clots and may contribute to the formation of atherosclerotic plaques. | Lipoprotein (a) |
| The minute-to-minute blood flow through the capillary beds is determined by the: | diameter of arterioles |
| The presence of ___________ stabilizes the wall of capillaries. | pericytes |
| The flow of blood from an arteriole to a venule is called the: | microcirculation |
| A metarteriole is a vessel that: | is an intermediate between the arteriole and the capillary bed. |
| Up to 65% of the body's blood supply is found in: | veins |
| Most neural controls of blood pressure involve input from baroreceptors, which are sensitive to: | to changes in blood pressure. |
| An elastic lamina on both sides of the tunica media is a characteristic of: | muscular arteries. |
| Which blood vessels is the most susceptible to atherosclerosis? | aorta |
| Blood enters the myocardium of the heart by coronary vessels that originate from the | aorta |
| The aorta is an example of a(n): | elastic artery |
| Gas and nutrient exchange occur in the: | capillaries |
| Leaky capillaries found in the bone marrow are called_________. | sinusoidal capillaries |
| _______ decreases peripheral resistance to blood flow? | Anemia |
| _______ is the pressure that propels blood to the tissues. | MAP |
| _______ (hormone) will cause a decrease in blood pressure | Atrial natriuretic peptide ANP |
| _______ (pair of organs) are involved in long-term blood pressure regulation | kidneys |
| Which of the following is an example of autoregulation of blood flow? Epinephrine, Sympathetic nerve impulses, Nitric oxide or Angiotension | Nitric Oxide |
| _____ would not move by diffusion across a capillary into the surrounding tissue. | Proteins |
| Anaphylaxis results from ________ shock. | Vascular |
| Substances absorbed in the intestines would be routed to the liver via the__________. | hepatic portal system |
| Vasodilation will result in increased blood flow to a given tissue. T or F | True |
| All capillary beds are continuously perfused with blood. T or F | False This would case massive blood to pool in tissue, thus the need for sphincters. |
| A sustained blood pressure of 140/90 or greater indicates hypertension in the patient. T or F | True |
| When albumin levels in the blood are below normal, fluid absorption from the tissues into the bloodstream increase. T or F | False Albumin is the major blood plasma protein. It greatly contributes to colloid osmotic pressure. Fluid from tissues into capillaries would diminish. |
| Veins only carry oxygen deficient blood. T or F | False Pulmonary veins carry oxygenated blood to heart. |
| The thick-walled arteries close to the heart are called muscular arteries. T or F | False These are elastic arteries. |
| Fenestrated capillaries are not found in the ______. | Brain (here you would find a special type of continuous) |
| The influence of blood vessel diameter on peripheral resistance is significant because ________. | resistance is inversely proportional to the fourth power of the vessel radius |
| Excess red cell production would cause an _________ in blood pressure. | increase |
Created by:
cmramirez