The sciatic nerve splits to form which two nerves?
A) pudendal and femoral nerves
B) femoral and tibial nerves
C) pudendal and common peroneal nerves
D) common fibular and tibial nerves
E) pudendal and tibial nerves
D
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During which of these time periods do teratogens have the most serious effects on fetal development?
A) period of fertilization B) first six months of pregnancy C) period of organogenesis D) final three months of pregnancy
What is the function of enteric sensory neurons?
A. detect changes in chemical composition of digestive tract contents B. stimulate or inhibit smooth muscle contraction in the digestive tract C. stimulate or inhibit glandular secretion in the digestive tract D. detect stretch of the digestive tract wall E. detect changes in chemical composition of digestive tract contents and detect stretch of the digestive tract wall
Of the nine abdominal regions, the central region is referred to as the ________ region.
A. inguinal B. hypogastric C. lumbar D. umbilical
The muscle weakness of myasthenia gravis results from
A) insufficient acetylcholine release from presynaptic vesicles. B) loss of acetylcholine receptors in the end-plate membrane. C) the motor neuron action potential being too small to shock the muscle fibers. D) excessive acetylcholinesterase that destroys the neurotransmitter. E) All of the answers probably contribute to the muscle weakness.