Voltage-gated K+ channels:
a. are closed during the falling phase of the action potential
b. are slow to close
c. are activated at threshold, but open a short time later
d. both b and c
e. all of the above
D
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Bile salts aid in the digestion of fats by ________ large fat droplets.
Fill in the blank(s) with the appropriate word(s).
An alternate term for tumor is
A) neoplasm. B) cytoplasm. C) benign malignancy. D) primary metastasis. E) nucleoplasm.
Sweating and shivering are necessary adaptations because
A. all parts of the body must remain at normal body temperature to maintain life. B. to ensure that total metabolic rate remains constant, the body generates or releases heat as needed. C. the health of vital organs requires a near-normal temperature, and metabolic rate fluctuates with changes in the environment. D. proteins rapidly denature when tissue temperature drops below 98.5°F.
Which of the following bones form the nasal septum?
A. Ethmoid and sphenoid B. Inferior nasal conchae and lacrimal bones C. Vomer and ethmoid D. Maxilla and vomer E. Nasal and vomer