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Midterm 3 Practice
Physiology 2420
| Question | Answer |
|---|---|
| The primary site of exchange between blood and interstitial fluid occurs across what type of blood vessel? | capillaries |
| Blood supply to the heart comes from __________. | coronary arteries |
| Chordae tendinae are strands of connective tissue extending from _____________ to ______________. | AV valves : papillary muscle |
| What blood vessel carries deoxygenated blood to the lungs? | pulmonary artery |
| Conduction through which of the following is slow to allow atria to contract before the ventricles? | AV Node |
| The rapid depolarization phase of a pacemaker cell action potential is caused by which of the following types of ion movement? | movement of calcium through L-type channels |
| What causes the rapid depolarization phase of a contractile cell action potential? | sodium movement into the cell |
| The elastic recoil of its walls during diastole causes a continuation of blood flow throughout the cardiac cycle. Which blood vessel? | Artery |
| What component of an ECG represents ventricular depolarization? | QRS xomplex |
| These blood vessels are slightly larger than capillaries and allow some exchange between blood and the tissue | Venule |
| Its high compliance allows it to hold a large volume of blood with little change in pressure. Which blood vessel? | Vein |
| An increase in the volume of blood ejected from the heart, with no change in total peripheral resistance, would ______________. | elevate mean arterial pressure |
| What blood cell contains B cells and T cells? | lymphocytes |
| This blood cell is the most abundant phagocyte in blood. | neutrophil |
| This blood cell differentiate into macrophages in the tissue. | monocyte |
| What triggers erythropoietin release? | decreased blood oxygen levels |
| During hemoglobin metabolism, what is the yellow pigmented substance produced by the removal of the iron group called? | bilirubin |
| What is hematocrit measuring? | Amount of erythrocytes (RBC's) |
| What is the function of spectrin? | Shape and flexibility of RBC |
| Where are erythrocytes synthesized? | bone marrow |
| What are three steps of homostasis? | 1. vascular spasm 2. formation of platelet plug 3. plug coagulation |
| What does carbonic anhydrase transport? | CO2 |
| Name one function of the spleen? | store RBC, remove old RBC, release bilirubin |
| What is produced as a result of hemoglobin catabolism and can under certain conditions of elevated plasma concentration cause a condition called jaundice? | bilirubin |
| Each hemoglobin molecule can bind up to how many oxygen molecules? | 4 |
| Name on way to increase mean arterial pressure. | increase cardiac output, increase total peripheral resistance |
| Blood vessels that bypass capillary beds are called _____________. | meta-arterioles |
| What is myogenic response? | inherent ability of smooth muscle to contact when stretched / or vasoconstriction to increase blood flow |
| During active and reactive hyperemia, what elements cause vasodilation? | decreased oxygen and increased carbon dioxide |
| Which blood vessels have the greatest cross sectional areas but the lowest viscosity? | capillaries |
| Name one factor influencing venous pressure and venous return (4 of them) | -Skeletal muscle pump -blood pressure -respiratory pump -vena motor pump |
| Which ions channels are responsible for the plateau phase in the contractile cell action potential? (either ions or the name of both channels for extra credit) | Ions: Calcium and Potassium Calcium L-type channel ??? |
| Which two ions move through the funny channel? | Sodium and Potassium |
| If the SA node fails, what other two locations in the heart can act as the pacemaker? | Av Node and Purkinje fibers |
| Which side of the heart is the tricuspod valve located on? Is this an AV valve or a semilunar valve? | Right, AV Valve |
Created by:
GracieLou
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