Cutaneous skeletal muscles of the face play an important role in ______.
A. digestion
B. mastication
C. heat generation
D. facial expression
Answer: d. Facial expression
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Iron is considered a
A. trace mineral, because less than 100 milligrams are required daily in the diet. B. trace mineral, because it is rare on the Earth. C. major mineral, because it is extremely abundant in the Earth. D. major mineral, because it has a crucial physiological role.
The thyroid gland secretes which of these hormones?
A) renin and erythropoietin B) insulin and glucagon C) mineralocorticoids, glucocorticoids, and androgens D) estrogen and testosterone E) T3, T4, and calcitonin
Normally, sodium and potassium leakage channels differ because __________.
Fill in the blank(s) with the appropriate word(s).
Prostacyclin is an eicosanoid that acts as a
A. platelet repellant. B. platelet attractant.