A neuron that stimulates a muscle cell is called a(n)
A. association neuron.
B. sensory neuron.
C. myofilament.
D. motor neuron.
Answer: D
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Briefly explain the action of a neurotransmitter. Include information regarding the source, target, and
mode of operation of a neurotransmitter. What will be an ideal response?
Which of the following sequences is incorrect?
a. Males: inhibin: secreted by Sertoli cells b. Males: follicle-stimulating hormone: stimulate production of androgen binding protein c. Males: gonadotropin-releasing hormone: stimulate testosterone production d. Females: luteinizing hormone: stimulate ovulation e. Females: inhibin: decreased secretion of FSH
The tracheal system of an insect is most like which of the following?
A) the exhaust system of an automobile B) the electrical wiring in a home C) the air duct system in a building D) leaves on a tree
Which of the following is an active enzyme?
A) apoenzyme B) cofactor C) coenzyme D) holoenzyme E) subtrate