Calcium ions serve as messengers, often in combination with the intracellular protein
A) calcitonin.
B) calcitriol.
C) calmodulin.
D) calcium-binding globulin.
E) calcitropin.
Answer: C
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Prostaglandins are ________.
A. long-range hormones B. formed slowly C. limited in function D. produced by many body tissues
The term aerobic means
a. in the blood. b. with carbon dioxide. c. with oxygen. d. without carbon dioxide. e. without oxygen.
In addition to temperature control, blood flowing to the skin supplies a source of ____________________
Fill in the blank(s) with correct word
Which of the following is NOT true of tonus?
A. It is a state of slight muscle contraction. B. During periods of tonus, the motor units take turns contracting. C. It occurs when a muscle is fully contracted. D. It keeps the motor units healthy and ready to contract at any time. E. All of these are true of tonus.