The voltage across a neuron's membrane has changed from its resting potential of -70mV to -80mV. Which of the following is most likely to be TRUE regarding this situation?
A) The neuron has bound a neurotransmitter that increases membrane permeability to sodium ions.
B) Large pores have opened in the membrane to allow release of large intracellular anions.
C) The neuron has bound a neurotransmitter that increases the permeability to chloride ions.
D) Additional myelin has been added to the membrane to provide greater electrical insulation.
Answer: C) The neuron has bound a neurotransmitter that increases the permeability to chloride ions.
You might also like to view...
Which muscle is not unique to the pelvic region?
A. gluteal B. iliacus C. piriformis D. All of the above are unique to the pelvic region
A portal system
A. includes a functional end artery that makes an arterial anastomosis. B. is a simple circulatory system with an areriovenous anastomosis. C. is one in which blood flows through two capillary beds before being sent back to the heart. D. is one in which circulation to a large organ involves only one artery and one main (portal) vein. E. is one in which multiple arteries converge on one organ or body region.
How many spermatozoa ultimately develop from each primary spermatocyte?
A. 1 B. 2 C. 3 D. 4 E. 5
Which of the following symptoms is common following damage to the cerebellum?
A. flaccid paralysis B. violent, uncontrolled body movements called chorea C. intention tremors D. resting tremors E. spastic paralysis