Which of the following cell types is long, slender and makes contractions?
A) red blood cells
B) bone cells
C) fat cells
D) muscle cells
E) white blood cells
Answer: D
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The extent of potassium excretion is regulated primarily by the
A) amount reabsorbed into the proximal tubule. B) amount secreted into the distal tubule. C) amount secreted into the proximal tubule. D) amount reabsorbed in the distal tubule. E) amount filtered by the basement membrane of the glomerular capillaries.
What is the significance of the scleral venous sinus?
A. It drains blood from the inner layer of the eyeball. B. It reabsorbs vitreous humor, to maintain proper pressure in the posterior cavity. C. It produces the vitreous humor. D. It produces the aqueous humor. E. It reabsorbs aqueous humor, to maintain proper pressure in the anterior cavity.
If you exercise with enough intensity that the blood pH is changed, you have exceeded the _______
A. aerobic threshold B. acidity point C. base point D. pH threshold E. anaerobic threshold
Collagenous fibers are very abundant in ________.
A. blood, adipose tissue, and osseous tissue B. ligaments, bones, and the most superficial portion of the skin C. blood and hyaline cartilage D. areolar tissue, tongue, and bones E. tendons, ligaments, and the deeper portion of the skin