Rickets, a disease characterized by overproduction and deficient calcification of osteoid tissue, is caused by a lack of sufficient
A. Vitamin D.
B. calcitonin.
C. Vitamin C.
D. thyroid hormone.
E. Vitamin A.
Answer: A
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The trigone is a triangular region of which of the following?
A. The hilum B. The renal cortex C. A renal pyramid D. The urinary bladder E. The prostatic urethra
Voltage-gated potassium channels in a neuron's axon are triggered to open when membrane potential becomes more negative.
Answer the following statement true (T) or false (F)
The composition of extracellular fluid has little affect on intracellular fluid amounts
Indicate whether the statement is true or false.
If agglutination occurs after a blood transfusion, it may indicate
A. there were no agglutinins (antibodies) in the recipient blood. B. the wrong blood type was used. C. the donor had type O blood. D. the recipient had type AB blood.