Which of the following is involved in the regulation of thyroid hormone levels?
A. Positive feedback mechanisms
B. Blood Ca2+ levels
C. PTH (parathyroid hormone) levels
D. Thyroid-stimulating hormone from the anterior pituitary
E. Thyroglobulin in thyroid follicles
Answer: D
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In order for growth to occur, the overall rate of anabolism must be greater than the overall rate of catabolism.
Answer the following statement true (T) or false (F)
Which of the following correctly describes an erection?
A) The spongy tissue in the penis fills with air. B) Parasympathetic neurons release nitric oxide causing dilation of small arteries in the penis. C) Smooth muscles of vascular spaces in the penis contract. D) Parasympathetic impulses constrict arteries leading to the penis.
Most carbon dioxide is transported in the blood by:
a. the globin portion of hemoglobin b. dissolved in plasma c. conversion to bicarbonate ions d. the heme portion of hemoglobin e. bound to albumin in the plasma
The ________ lead from the eyes to the optic chiasma.
A. optic radiations B. optic nerves C. optic tracts