The ________ system defends the body against infection and disease
A) urinary
B) cardiovascular
C) lymphatic
D) reproductive
C
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Under normal circumstances, which passageway is capable of conducting air, food, or liquid?
A. Nasopharynx B. Trachea C. Larynx D. Glottis E. Laryngopharynx
Which of the following most accurately describes a motor unit?
A. a single muscle fiber and a single motor neuron B. a single motor neuron and all muscle fibers it innervates C. a single muscle fiber and several motor neurons D. none of the above
What is found in the antrum of an oocyte?
A. Thecal fluid B. Estrogen C. Testosterone D. Progesterone E. The zona pellucida
What is the shape of red blood cells?
a. round, donut shaped, and biconcave b. round, ball shaped, and biconvex c. flat, disc shaped, and biconcave d. flat, ovoid, and biconvex e. bulbous, cigar shaped, and biconcave