What is the main role of magnesium ions in the body?
A. muscle contraction
B. nerve impulse
C. blood clotting
D. cofactors for intracellular enzymes
D
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Identify the FALSE statement.
A) Some reflexes are genetically determined. B) Adipose tissue is controlled by autonomic efferents. C) Muscle spindles are stretch receptors. D) Proprioceptors detect limb position and movement. E) All reflexes require input from the brain.
Blood is supplied to the endometrium by which arteries between the endometrial glands?
A. Spiral B. Arcuate C. Gonadal D. Cardinal E. Uterine
Select the correct statement about the heart valves.
The AV valves are supported by chordae tendineae so that regurgitation of blood into the atria during ventricular contraction does not occur. The tricuspid valve divides the left atrium from the left ventricle. The mitral valve separates the right atrium from the right ventricle. Aortic and pulmonary valves control the flow of blood into the heart.
What gland produces tears?
a. lateral gland b. crimson gland c. lacrimal gland d. luminal gland e. pineal gland