Which of the following is not a component of a reflex arc?
A. Somatic receptors
B. Efferent nerve fibers
C. Integrating center
D. Afferent nerve fibers
E. Motor neurons in the cerebral cortex
Answer: E
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Binding of ACh with receptor sites on the motor end plate opens chemical messenger-gated cation channels in the motor end plate, bringing about depolarization of the motor end plate
Indicate whether the statement is true or false
The ________ is a U-shaped bone that sits above the larynx yet does not articulate with any other bone
A) maxilla B) hyoid bone C) mandible D) zygomatic bone
Which of these is commonly classified as a female secondary sex characteristic?
A. The ovary B. The labia majora C. The uterus D. The distribution of body fat E. The vagina
The structure that produces a thin, milk-colored fluid that composes about 30% of the seminal fluid volume is the:
a. seminal vesicles b. prostate gland c. bulbourethral glands d. seminiferous tubules