If voltage-dependent potassium (K+) channels opened at -65 mV in the giant axon of the squid -- HYPOTHETICALLY -- and all other factors (e.g., charge & concentration gradients) were "normal", which of the following would occur? O A. The concentration gradient of K+ would "urge" K+ to leave the cell. OB. The charge gradient of K+ would "urge" K+ to leave the cell. C. The concentration gradient of K+ would "urge" K+ to enter the cell. OD. The charge gradient of K+ would "urge" K+ to enter the cell. O E. A &B OF. A &D O G.B &C O H.C &D

If voltage-dependent potassium (K+) channels opened at -65 mV in the giant axon of the squid -- HYPOTHETICALLY -- and all other factors (e.g., charge & concentration gradients) were "normal", which of the following would occur? O A. The concentration gradient of K+ would "urge" K+ to leave the cell. OB. The charge gradient of K+ would "urge" K+ to leave the cell. C. The concentration gradient of K+ would "urge" K+ to enter the cell. OD. The charge gradient of K+ would "urge" K+ to enter the cell. O E. A &B OF. A &D O G.B &C O H.C &D

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Virtually all vertebrate cells, whether excitable or not, have a resting membrane potential (RMP). please choose the right answer fro C1 C2 C3 and C4 C. Suppose you add enough KCl to increase the [K+] in the ECF from the usual value (3 mM) to 4.5 mM. What should happen to a neuron? C-1. You expect the RMP to become (+ or more +) (- or more -) (less -) (less +) (go to, or stay at, zero) (stay at the normal nonzero value). C-2. You expect the total number of K+ ions inside the cell to (increase) (decrease) (stay about the same). C-3. You expect the net [K+] inside the cell -- in mM -- to (increase significantly) (decrease significantly) (stay about the same). C-4. Suppose the neuron under consideration gets input from many different synapses. You increase the [K+] in the ECF as above. Given your answer to part C-1, the neuron should be (more likely) (less likely) (about equally likely) to fire an action potential. No explanation required on the exam, but it helps to see how you…
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