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Cards In This Set
| Front | Back |
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The human axial skeleton includes all of the following EXCEPT
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A. skull.
b. ribs. c. pectoral girdle. d. sternum. e. vertebral column. |
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Which of the following is NOT part of the appendicular skeleton?
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A. clavicle
b. scapula c. fibula d. ribs e. patella |
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The mineral stored in greatest quantity in bones is?
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CALCIUM
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In spongy bone tissue the spaces are filled with?
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Marrow
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Smooth muscle is
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Involuntary and nonstriated
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Which of the following includes all the others?
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A. actin
b. myofibril c. myosin d. myofilament e. muscle cell |
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The sliding filament theory states that, during muscle contraction and relaxation,
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Actin and myosin filaments change positions relative to each other
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During muscle contraction, calcium ions bind to
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Troponin
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After a myosin head has performed a power stroke, it must first bind to _____ in order to perform another power stroke.
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ATP
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During the systole phase of the cardiac cycle, high blood pressure in the ventricles forces the
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Aortic valve to open
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When is the ventricular blood volume higher?
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At the beginning of systole
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In the cardiac cycle, when do the atrioventricular valves close?
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During ststole
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Mast cells and _____ release histamine.
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Basophils
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Which of the following is not a lymphocyte?
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Macrophage
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Which statement is false?
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A. Macrophages activate T cells by secreting cytokines.
b. Macrophages phagocytize microorganisms and debris. c. Macrophages activate B cells by secreting cytokines. |
