____________________ carries cholesterol to cells, whereas ____________________ transports it away from cells
Fill in the blank(s) with correct word
LDL, HDL
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In the diastole phase of the ventricles, __________.
a. the ventricles are "resting" b. presystolic pressures are high c. the semilunar valves are open d. the AV valves are closed
The enzyme produced by the kidneys when blood pressure drops, stimulating a release of aldosterone, is called ________
A) cortisone B) renin C) cortisol D) vasopressin E) angiotensin II
Higher brain centers that alter the activity of the respiratory centers include all of the following except
A) cortical association areas. B) the precentral motor gyrus. C) the limbic system. D) the hypothalamus. E) Broca's center.
Ingestion refers to the
A) progressive dehydration of indigestible residue. B) input of food into the digestive tract through the mouth. C) chemical breakdown of food. D) absorption of nutrients in the gut. E) mixing of nutrients with digestive enzymes.