An increase in the level of estrogen in the ovarian cycle feeds back to ______ the secretion of FSH and to ________ the secretion of LH
a. decrease; decrease
b. decrease; increase
c. increase; decrease
d. increase; increase
B
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The parasympathetic nervous system dominates in fight-or-flight situations
Indicate whether the statement is true or false
When the myosin head flexes into a bend, pulling the actin filament along with it, this is called the
A. action reaction. B. power stroke. C. recovery stroke. D. muscle tone. E. action potential.
Beriberi is a degenerative disease caused by a deficiency of ________, having the effects of muscle weakness and CNS and cardiovascular problems including heart disease.
A) vitamin B1 (thiamine) B) vitamin B12 (cobalamin) C) vitamin C (ascorbic acid) D) niacin (nicotinic acid) E) vitamin B2 (riboflavin)
Speech sounds are normally produced from
A. air moving through vocal cords and the epiglottis vibrating. B. oscillations of the uvula. C. vibrations of tracheal cartilages. D. air moving up through the vocal cords. E. the epiglottis vibrating.