Name the ion that commonly serves as a cofactor for intracellular enzymes, such as the sodium-potassium pump.
A. Hydrogen
B. Magnesium
C. Calcium
D. Phosphate
E. Carbonate
Answer: B
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The medial and lateral epicondyles are found on the distal end of the humerus and are used for
a) formation of the elbow joint. b) tendon attachment. c) passage of nerves and blood vessels through the bone into the marrow cavity. d) Both formation of the elbow joint and tendon attachment. e) All of these choices are correct.
Skeletal muscles are stimulated to contract by release of the neurotransmitter ____________________
Fill in the blank(s) with correct word
What ion enters the muscle cell upon activation of the acetylcholine receptors?
A) sodium B) calcium C) potassium D) chloride
When someone begins to hyperventilate, the increased movements of their respiratory muscles ________ venous return of blood to the heart.
A. decrease B. increase