The ____ and ____ enable the kidneys to produce urine of varying concentrations and volumes depending on the body's needs
a. Na+-K+ ATPase pump; co-transport carriers
b. juxtaglomerular apparatus; vasa recta
c. podocytes; peritubular capillaries
d. medullary vertical osmotic gradient; vasopressin
e. renin-angiotensin-aldosterone system; renal pyramids
D
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The part of the sternum that articulates with the clavicles is the
A) manubrium. B) body. C) xiphoid process. D) angle. E) tuberculum.
Aldosterone exerts effects on principal cells of the kidney by causing
A. increased numbers of Na+/K+ pumps. B. decreased numbers of Na+/K+ pumps. C. increased levels of cAMP and increases in the total number of Na+ channels. D. decreased levels of cAMP and decreases in the number of open K+ channels.
The tricuspid valve is located between the
a. right and left atria. b. right and left ventricles. c. right atrium and right ventricle. d. left atrium and left ventricle. e. right ventricle and the aorta.
A pole vaulter keeps track of his position in mid-air through
A) pain receptors. B) baroreceptors. C) lamellated corpuscles. D) proprioceptors.