An enzyme
A. has a two-dimensional shape.
B. is a protein catalyst.
C. increases the activation energy needed in a chemical reaction.
D. cannot be denatured.
E. is permanently changed in a chemical reaction.
Answer: B
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Which descending tract is involved in reflex movements of the head in response to visual and auditory stimuli?
A. Corticospinal B. Spinothalamic C. Tectospinal D. Reticulospinal E. Vestibulospinal
Intrapleural pressure is usually less than atmospheric pressure
Indicate whether the statement is true or false
Select the statement that best describes the function of tropic hormones
A) Tropic hormones stimulate the pineal gland to secrete hormones. B) Tropic hormones stimulate the thymus gland to secrete hormones. C) Tropic hormones stimulate other endocrine glands to secrete hormones. D) Tropic hormones stimulate nervous tissue to produce neurotransmitters. E) Tropic hormones stimulate production of prostaglandins.
The opposite of depression is
A. inversion. B. protraction. C. elevation. D. pronation. E. flexion.