Which can be used to characterize blood flow in the human body?a: There is a unidirectional blood flow.b: Arteries always carry oxygenated blood.c: Veins always carry deoxygenated blood.d: Arteries carry blood away from the heart.e: Veins carry blood toward the heart.
A. d, e
B. a, d, e
C. b, c, d, e
D. a, b, c, d, e
E. a, c, d, e
Answer: B
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Miguel fell out of a tree and broke his fall by putting his arm out, fracturing his radius and ulna. The bones were still aligned at the fracture site. Which specific type of bone fracture is Miguel most likely to have?
A. Stress fracture fracture B. Spiral fracture C. Nondisplaced fracture D. Avulsion fracture E. None of the choices are correct.
Compare obligatory water reabsorption with facultative water reabsorption
A) Obligatory water reabsorption cannot be prevented, whereas facultative water reabsorption can be precisely controlled. B) Obligatory water reabsorption can be precisely controlled, whereas facultative water reabsorption cannot be prevented. C) Obligatory water reabsorption occurs in the distal convoluted tubule under control of ADH, whereas facultative water reabsorption occurs in the proximal convoluted tubule following the osmotic gradient. D) Obligatory water reabsorption occurs in the ascending limb of the nephron loop, whereas facultative water reabsorption occurs in the descending limb of the nephron loop. E) Obligatory water reabsorption is responsible for regulating the final concentration and volume of water lost in urine, whereas facultative water reabsorption is responsible for about 85 percent of water reabsorbed out of the filtrate.
Which of the following cranial nerves is mispaired?
A. Abducens - V B. Oculomotor - III C. Facial - VII D. Accessory - XI
Adenylate cyclase causes ATP molecules to become ________ molecules.
Fill in the blank(s) with the appropriate word(s).