The LH surge associated with ovulation is triggered by
a. a rise in progesterone levels.
b. a positive feedback cycle with estrogen.
c. a negative feedback cycle with FSH.
d. changes in the follicle as it transitions to the corpus luteum.
B
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Visceral reflex arcs differ from somatic in that ________.
A) visceral arcs contain two sensory neurons B) somatic arcs contain one additional component that visceral arcs do not possess C) visceral arcs involve two motor neurons D) visceral arcs do not use integration centers
The largest lipoproteins, ________, are produced by intestinal epithelial cells from the fats in food
A) very-low-density lipoproteins (VLDLs) B) low-density lipoproteins (LDLs) C) intermediate-density lipoproteins (IDLs) D) high-density lipoproteins (HDLs) E) chylomicrons
The adrenal medulla produces the hormones
A) epinephrine and androgen. B) epinephrine and norepinephrine. C) corticosterone and testosterone. D) androgens and progesterone. E) norcortisol and cortisol.
Which of the following is a function of the hypothalamus?
A. Perception of sensation B. Involved in psychosomatic illnesses C. Unconscious swinging of the arms while walking D. Control of balance E. Initiates voluntary movements