How many types of T cells are there?
a. two
b. three
c. four
d. five
e. six
b
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Indicate whether the statement is true or false
When elastic recoil is decreased, as with asthma, passive expiration may be inadequate to expel the volume of air normally exhaled during quiet breathing
a. True b. False Indicate whether the statement is true or false
Rebecca's younger sister just told her that she has begun menopause. Rebecca wonders if she has begun menopause as well. One of the symptoms to watch out for is
A. the cessation of menstrual cycles. B. the pause in development of ovarian follicles occurring between the birth of a baby girl and when she reaches puberty. C. high plasma levels of estrogens. D. cessation of gonadotropin secretion. E. the cessation of ovulation while a baby is nursing.
An electromyogram is ________
A) a graphic representation of the voltage waveforms associated with muscle contraction B) a visual recording of the force generated by muscle contraction C) an instrument used to record the electrical activity of muscles D) a device used to measure the force of muscle activity