Which of the following events occurs last?
A. release of renin by the kidney
B. release of aldosterone by the adrenal cortex
C. sodium reabsorption by the kidney tubules
D. angiotensinogen ? angiotensin I
E. angiotensin I ? angiotensin II
C
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Polar bears have black skin. This characteristic helps them deal with cold stress by
a. increasing the amount of air trapped next to the skin. b. increasing the absorption of radiant energy from the sun. c. increasing the insulation provided by subcutaneous fat. d. reducing heat loss by restricting blood flow to the skin.
What three characteristics are used to describe multicellular exocrine glands?
A) size, water-soluble or lipid-soluble secretions, and location of the gland B) structure of the duct, shape of the secretory area, and relationship between the duct and secretory areas C) number of ducts, width of the secretory area, and the distance between the duct and the secretory areas D) depth of the secretory area, whether the duct opens inside or outside the body, and if the secretion is mucus or serous E) type of epithelial cells that line the duct, type of epithelial cells that make up the secretory area, and the mode of secretion
The ______________________________ brings oxygenated blood to the heart muscle
? Fill in the blank(s) with correct word
Select all that are true when a muscle fiber is at rest.A) There is a charge difference across the sarcolemma.B) Sodium-potassium pumps are active.C) Calcium is stored in the sarcoplasm.D) ACh receptors are open.
What will be an ideal response?