The first blood vessels that branch from the ascending aorta are the ________.
A. brachiocephalic arteries
B. coronary arteries
C. subclavian arteries
D. pulmonary arteries
E. common carotid arteries
Answer: B
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Matching
A) D B) C C) E D) A 6) Efferent vessels. 7) Cortex. 8) Medullary cord. 9) Trabecula. 10) Medulla.
Which statement about the medullary vertical osmotic gradient is incorrect?
a. Juxtamedullary nephrons create the gradient through countercurrent multiplication. b. Vasa recta supply blood to the medulla while conserving the gradient. c. Collecting tubules of juxtamedullary nephrons, but not cortical nephrons, descend through the gradient before emptying into the renal pelvis. d. The gradient permits excretion of urine of differing concentrations by means of vasopressin-controlled, variable H2O reabsorption from the final tubular segments. e. None of the above statements are incorrect.
The cardioacceleratory center fibers are part of the
a. cranial peripheral nervous system. b. somatic peripheral nervous system. c. sympathetic nervous system. d. parasympathetic nervous system.
Calcitonin stimulates Ca2+ deposition by ________ and Ca2+ excretion by the kidneys.
A. osteocytes B. osteoclasts C. osteoblast D. osteoprogenitor cells