Which of the following occurs during forced expiration?
a. The alveoli inflate.
b. The ribs move upward.
c. The internal intercostal muscles contract.
d. The floor of the thoracic cavity moves downward.
e. The pressure increases in the thoracic cavity.
C
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Cardiac muscle fibers differ from skeletal muscle fibers in that only the
a. cardiac fibers can contract without neural stimulation. b. skeletal fibers are striated. c. cardiac fibers contain glycogen. d. skeletal fibers are connected electrically. e. cardiac fibers are arranged in motor units.
A genus in the family Enterobacteriaceae that is a major pathogen of crop plants is ________.
A. Erwinia B. Shigella C. Yersinia D. Proteus
EGF (epidermal growth factor) activates cell division by binding to ________
Fill in the blank with correct word.
All of the following pertain to genital warts, except
A. they are sexually transmitted. B. they often occur on the penis, vagina, and cervix. C. the are not common in the United States. D. they include large cauliflower-like masses called condylomata acuminata. E. certain strains strongly predispose a person to cancer of the cervix or penis.