What is the fate of ACh following binding to receptors?
a. it remains bound causing continued excitement.
b. it is removed by the enzyme acetylcholinesterase.
c. it is actively reabsorbed the axon terminal.
d. it is passively reabsorbed by the muscle cell.
e. none of these answers.
B
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Choose the age-related changes that are often seen in the reproductive system of males
Decreased size and weight of gonadal tissue Infertility Changes in the prostate gland Increased incidence of erection Decreased libido
The regulation of water and ion excretion occurs primarily within the
A) proximal tubules only. B) late distal tubules only. C) collecting ducts only. D) both proximal tubules and late distal tubules. E) both collecting ducts and late distal tubules.
Which of the following muscles attaches on the head of the fibula?
A. Semitendinosus B. Biceps femoris C. Extensor digitorum longus D. Tibialis anterior E. Popliteus
Which nerve carries more than 90% of the parasympathetic fibers?
A. Glossopharyngeal B. Phrenic C. Pelvic splanchnic D. Vagus E. Facial