What is a lever?
A. The pivot point that does not move
B. The force applied to lift the weight
C. The weight to be lifted
D. A rigid object used to lift something
Answer: D
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What nerves carry information about the special senses to the central nervous system (CNS)?
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The philtrum is a shallow groove in the skin between your nose and upper lip. Which terms best describes the position of the philtrum?
a. lateral and plantar b. medial and proximal c. dorsal and distal d. superficial and anterior
Cerebrospinal fluid is formed from blood by clusters of capillaries in the brain known as ________
A) choroid plexuses B) arachnoid villi C) ventricles D) sinuses
Which of the following correctly describes an erection?
A. The spongy tissue in the penis fills with air. B. Smooth muscles of vascular spaces in the penis contract. C. Parasympathetic impulses constrict arteries leading to the penis. D. Parasympathetic neurons release nitric oxide causing dilation of small arteries in the penis.