Which of the following is an effect of aldosterone on principal cells?
A) increased number of Na+/K+ pumps in the apical membrane
B) increased number of open Na+/K+ channels in the basolateral membrane
C) decreased number of open Na+/K+ channels in the basolateral membrane
D) increased number of open Na+/K+ channels in the apical membrane ++
E) decreased number of Na /K pumps in the basolateral membrane
Answer: D) increased number of open Na+/K+ channels in the apical membrane ++
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Muscles are categorized as striated (skeletal and cardiac muscle) or unstriated (smooth muscle)
a. True b. False Indicate whether the statement is true or false
Steroids
a. are lipophilic. b. are derived from cholesterol. c. initiate the synthesis of specific new proteins within their target cells. d. are lipophilic and derived from cholesterol. e. all of these answers.
The region known as the primitive streak is the site of
A) migration of mesodermal cells to form the endoderm. B) endoderm formation. C) ectoderm formation. D) migration of ectodermal cells to form the mesoderm. E) amnion formation.
What is the falciform ligament?
A) dorsal mesentery of the stomach B) dorsal mesentery of the small intestine C) remnant of the ventral mesentery between the liver and the anterior wall of the peritoneal cavity D) remnant of the ventral mesentery between the stomach and the liver E) dorsal mesentery of the large intestine