The core temperature is maintained at a fairly constant level, but skin temperature is quite variable
Indicate whether the statement is true or false
T
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Which statement is not true?
a. Vitamin D deficiency is the cause of rickets. b. PTH is the most important hormone in the control of calcium metabolism. c. Both calcitonin and PTH are produced in the follicle cells of the thyroid gland. d. Vitamin D is actually a hormone that increases calcium absorption in the intestine. e. Parathyroid hormone is essential for life.
The overall purpose of the countercurrent exchange system is to ________.
A. remove metabolic wastes from the renal cortex B. supply nutrients and oxygen to the renal medulla C. supply nutrients and oxygen to the renal cortex D. supply salt and urea to the renal medulla E. remove metabolic wastes from the renal medulla
Which type of blood vessel holds the greatest volume of blood?
A. Vein B. Artery C. Arteriole D. Capillary
With athletic conditioning, type 2 muscle fibers can gain myoglobin.
Answer the following statement true (T) or false (F)