Select the tissue that is a simple epithelium
A) areolar B) transitional C) dense regular D) pseudostratified
Answer: D
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One difference between cardiac and skeletal muscle contractions is that in cardiac muscle
A. acetylcholine has a more excitatory effect. B. the H zones increase in size while the I bands decrease in size. C. there are no thin filaments. D. some of the calcium used for contraction comes from outside the cell.
Which fibers dominate many of the back and calf muscles that contract almost continually to maintain posture?
A. Slow-twitch B. Intermediate C. Fast-twitch
The cells lining the proximal convoluted tubule
A) are closely associated with unusual smooth muscle fibers. B) reabsorb water and reabsorb or secrete sodium, potassium, hydrogen, and bicarbonate ions. C) are not permeable to water and solutes. D) are unusually tall, and their nuclei are clustered together. E) reabsorb organic nutrients, plasma proteins, and ions from the tubular fluid.
What are vibrissae?
A. Nasal guard hairs B. Nasal cartilages C. Cilia of the nasal mucosa D. Folds in the larynx E. Air passages between the nasal conchae