Epidermal cells are sloughed off from the ________.
A. basal layer
B. clear layer
C. horny layer
D. dermal layer
Answer: C
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The function of the epiglottis is to
A) seal the opening larynx during swallowing. B) contain lymphoid tissues as do the tonsils. C) equalize air pressure between the naso- and oropharyngeal regions. D) warm the entrance to the pharynx, as it is extremely vascular with warm arterial blood. E) None of the answers are correct.
Slow, deep breathing is more effective for increasing alveolar ventilation than is rapid, shallow breathing
Indicate whether the statement is true or false
Calcium homeostasis involves
a. immediate adjustments required to maintain a constant free Ca2+ concentration on a minute-to-minute basis b. slowly responding adjustments required to maintain a constant total amount of Ca2+ in the body c. actions of parathyroid hormone d. both a and c e. both b and c
All of the following enzymes are secreted by the pancreas except
A) trypsin. B) amylase. C) nuclease. D) chymotrypsin. E) insulin.