BIO 150 Study Guide - Final Guide: Rheumatic Fever, Atrioventricular Node, Purkinje Fibers
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12 Dec 2017
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Organization: heart, arteries, arterioles, capillaries, capillary beds: networks of vessels that infiltrate tissues to bring blood very close to individual cells, venules, veins. Stroke volume: amount of blood pumped by ventricle in a single contraction: average stroke volume: 70ml. Blood pressure reading of 120/80 indicates: the ventricles have higher pressure during contraction while the arteries have lower pressure. Recording of impulses sent from sa nodes (pacemaker cells) through av node to bundle branches and purkinje fibers. Delay between sa node and av node allows atria to completely empty before ventricular contraction. Pacemaker (sa node) changes signaling frequency in response to activity or hormone signaling (epinephrine/norepinephrine = fight/flight); even body temperature (fever = higher heart rate) 55% plasma: water, ions, proteins, nutrients, waste, gases, hormones. Carry o2 from lungs to cells and tissues. Iron from erythrocytes returned to bone marrow and recycled into new red blood cells. 5 types, also called leukocytes: neutrophils, eosinophils, basophils, lymphocytes, monocytes.
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Which one of the following IS NOT a function of the Human Circulatory System?
mounting a response to invading microorganisms |
transporting hormones |
nutrient transport |
waste transport |
wound clotting |
urine transport |
Which one of the following paths shows the correct pathway for blood in the blood vessels?
Arteries -> Veins -> Capillaries -> Venules -> Arterioles |
Arteries -> Arterioles -> Capillaries -> Venules -> Veins |
Capillaries -> Veins -> Venules -> Arterioles -> Arteries |
Veins -> Venules -> Capillaries -> Arteries -> Arterioles |
A Heart Murmur is a defect in one or more heart valves that permits a backflow of blood and reduces the Blood volume output of the Heart.
True |
False |