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Midterm 3 2011

Physiology 2420

QuestionAnswer
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