The neck and abdominal muscles are involved in a
A) quiet exhalation
B) forceful exhalation
C) quiet inspiration
D) None of the answers are correct.
Ans: B) forceful exhalation
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Epithelia are connected to underlying connective tissues by
A) a basement membrane and protein filaments embedded in glycoprotein only. B) a basement membrane, protein filaments embedded in glycoprotein, and a basal lamina. C) a basement membrane only. D) protein filaments embedded in glycoprotein only. E) a basal lamina only.
Which of the following organs produces bile?
a. liver c. gallbladder b. kidney d. pancreas
The ____ nerves to the heart alter cardiac output by decreasing heart rate
a. motor. b. sensory. c. sympathetic. d. vagus e. none of these answers.
The equilibrium potential of K+ ions in nerve cells is about -90 mV. The membrane potential of typical nerve cells at rest is -70 mV. Therefore
A. Increasing the permeability of a resting neuronal membrane to K+ will make the membrane potential more negative inside with respect to outside. B. In resting neurons, there is a net diffusion of K+ into the cell. C. changing the resting membrane potential of a neuron to -80 mV would increase K+ diffusion rate out of the cell. D. potassium is the only permanent ion at rest. E. there must be another permanent ion with an equilibrium potential more negative than -90 mV.