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Midterm 3 2011
Physiology 2420
| Question | Answer |
|---|---|
| Receives deoxygentated blood from veins | right atrium |
| Receives blood from the pulmonary veins | left atrium |
| this chamber empties into the aorta | left ventricle |
| The SA node is located here | ?? |
| What blood vessel carries deoxygenated blood to the lungs? | pulmonary artery |
| What is the conduction pathway through the heart? | SA node; AV node; Bundle of HIS; bundle branches; purkinje fibers |
| 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 |
| What are some characteristics of the excitation-contraction coupling in cardiac muscles? | an action potential travels along transverse tubules, calcium channels in the plasma membrane open, allowing calcium to enter the cell; calcium channels in the SR open, allowing calcium to enter the cytosol; calcium opens calcium channels in the SR |
| Which of the following components of an ECG represents ventricular depolarization? | QRS complex |
| Which of the following leukocytes are most commonly known as phagocyte? | both neutrophils and monocytes |
| B Cells and T cells fall under what category of leukocytes? | lymphocytes |
| What organ can store iron at transferrin? | none |
| What hematopoietic growth factor controls red blood cell synthesis, and what organ releases it? | transferrin; bone marrow |
| During hemoglobin metabolism, what is the yellow pigmented substance produced by the removal of the iron group called? | bilirubin |
| Iron is transported in blood bound to what molecule? | transferrin |
| What triggers erythropoietin release? | decreased blood oxygen levels |
| What type of leukocyte differentiates into macrophages in the tissues? | monocytes |
| Which of the following is the second step of homostasis? | formation of a platelet plug |
| High doses of aspirin can _____________ clotting by inhibiting the synthesis of prostacyclin | stimulate |
| Low doses of aspirin can ______________ clotting by inhibiting the synthesis of prostacyclin. | inhibit |
Created by:
GracieLou
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