The length of the gastrointestinal tract in an adult is about
a. 9 feet
b. 19 feet
c. 29 feet
d. 39 feet
c. 29 feet
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A sensory illusion called paradoxical cold happens when a point heat stimulus is applied to a cold patch of skin and is perceived as cold, not hot. This illusion happens due to
A) Labeled-line pathways. B) Population coding. C) Both heat and cold receptors on the same sensory neuron. D) Lateral inhibition.
Which of the following statements concerning the permeability of a typical neuron membrane at rest is TRUE?
A. The permeability to Na+ is much greater than the permeability to K+. B. All of the K+ channels in the membrane are open. C. The voltage-gated Na+ channels are in the inactivated state. D. Most of the voltage-gated Na+ channels are in the closed state. E. There is equal permeability to Na+ and K+.
Where in the body would you expect to find cells that have an abundance of smooth endoplasmic reticulum?
A. The surface of the skin B. The lining of the stomach C. The brain D. The ovaries E. The bone marrow
Most primates are ________, meaning they live in trees.
A. prehensile B. cursorial C. bipedal D. troglodytic E. arboreal