Which of the following provides the best example of a negative feedback control mechanism?
A. Shivering and generating heat in response to a drop in body temperature
B. Increased uterine contractions in response to oxytocin during labor
C. Putting on a sweater because you think it is cold outside
D. Increased body temperature in response to exercise
Answer: A
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Olfactory information is first received by which part of the brain?
A) pons B) cerebellum C) thalamus D) cerebrum E) medulla oblongata
Which hormone is transported to its target via the hypophysial portal system?
A. Adrenocorticotropic hormone B. Anti-diuretic hormone (ADH) C. Follicle-stimulating hormone (FSH) D. Prolactin E. Thyrotropin-releasing hormone
The process of preventing micturition in spite of initiation of the reflex involves
a. the cerebral cortex b. voluntary stimulation of the motor neuron supplying the external urethral sphincter c. voluntary stimulation of the internal urethral sphincter via its parasympathetic nerve supply d. both a and b e. a, b, and c
Vasoconstriction
a. causes a decrease in resistance. b. occurs when there is a decrease in the radius of a vessel. c. due to a decrease in sympathetic activity. d. two of these answers. e. all of these answers.