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Physiology
Assignment 2
| Question | Answer |
|---|---|
| The localized pressure gradient needed to maintain blood flow in a tissue is called | perfusion pressure |
| The mechanisms of which three hormones work together to regulate blood volume? | aldosterone, ANH, and ADH |
| The vagus is said to act as a brake on the heart. This is called... | vagal inhibition |
| ______ shock results from a condition in which infectious agents release toxins into the blood. | septic |
| Which are the two baroreceptors that are located near the heart? | aortic and carotid |
| Factors that affect the strength of the myocardial contraction are called.... | inotropic factors |
| Starling's law of the heart states that, within limits, the longer or more stretched the heart fibers are at the beginning of the contraction, the _______ | stronger the contraction |
| Blood flow from the heart through the blood vessels to all parts of the body and back to the heart is referred to as ____ circulation. | systemic |
| Which sphincters function as regulatory valves that reduce the flow of blood through a network of capillaries when they contract and constrict the arterioles? | precapillary sphincters |
| Which types of arteries are also called conducting arteries and include the aorta? | elastic arteries |
| The ____ drains much of the superficial leg and foot. | great saphenous vein |
| Microscopic vessels that carry blood from small arteries to small veins are called | capillaries |
| During pregnancy, what happens to the oxygenated blood returned from the placenta via the umbilical vein? | it flows into the inferior vena cava |
| The internal iliac artery supplies blood to the _____ | pelvis |
| The normal cardiac impulse that initiates mechanical contraction of the heart arises in the ____ | SA node |
| The bulk of the heart wall is the thick, contractile middle layer called the | myocardium |
| From which vessels do myocardial cells receive blood? | coronary arteries |
| The heart has its own special covering, a loose-fitting inextensible sac called the _____ | pericadium |
| Mechanical devices that permit the flow of blood in one direction only are called | valves |
| The type of membranous tissue that lines the heart and blood vessels is the | endothelium |
| The normal ECG is composed of all of the following except a | E wave |
| The localized pressure gradient needed to maintain blood flow in a tissue is called | perfusion pressure |
| Blood volume per kilogram of body weight varies inversely with | body fat |
| A decrease in the amount of white blood cells is called | lekopenia |
| Erythrocytes being their maturation sequence in red bone marrow from nucleated cells known as | hematopoietic stem cells |
| A glycoprotein hormone that is secreted to increase oxygen concentration in the tissues is | erythropoietin |
| The difference between systolic pressure and diastolic pressure is called | pulse pressure |
| The physiological mechanism that dissolves clots is known as | fibrinolysis |
| Cardiac output is determined by | stroke volume and heart rate |
| Which two factors promote the return of venous blood to the heart? | blood pumping action of respirations and skeletal muscle contractions |
Created by:
cangel
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