The renal corpuscle consists of
A. Bowman's capsule and the renal pelvis.
B. the glomerulus and Bowman's capsule.
C. the renal pelvis and the renal tubules.
D. afferent and efferent arteriole.
E. the proximal convoluted tubule and the glomerulus.
Answer: B
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Which of the following is not an antagonistic hormone pair?
A) glucagon; insulin B) calcitonin; parathyroid hormone C) leptin; thymosins D) aldosterone; atrial natriuretic peptide E) FSH; inhibin
The squid served as an ideal model system to study neurophysiology because
A) Squids are invertebrates and invertebrates have a simpler nervous system than vertebrates. B) The large diameter of the squid's neurons enabled researchers to make recordings from inside of a nerve cell. C) Fast electrical communication is a unique feature of squids. D) Squids are active predators and therefore have many nerves that can be easily studied.
Which of the following is (are) true of the thymic lobules?
A) They are the site of the production of lymphocytes, but not of the T cells. B) They contain lymphoid stem cells and thymic corpuscles. C) They lack an internal structure of a cortex and a medulla. D) They contain special capillaries that selectively acquire circulating antigens to pass through the tissues. E) All of the answers are correct.
Which of the following events occurs last?
A. IP3 stimulates Ca2+ release from the endoplasmic reticulum.
B. Ca2+ binds with calmodulin.
C. IP3 (inositol triphosphate) is produced.
D. Epinephrine combines with membrane-bound receptor on smooth muscle cell.
E. Calmodulin binds to the enzyme that phosphorylates myosin and cross-bridges form.