Which phenomenon causes the downward slope of the curve labeled PNa? Which phenomenon causes the upward slope of the curve labeled PK? After the peak, the action potential curve begins to slope downward. What does the downward slope represent? Which phenomena cause the downward slope?

Which phenomenon causes the downward slope of the curve labeled PNa? Which phenomenon causes the upward slope of the curve labeled PK? After the peak, the action potential curve begins to slope downward. What does the downward slope represent? Which phenomena cause the downward slope?

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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Question

100%

The phases and ionic basis of an action potential.
Membrane potential (mv)
+30
-55
-70
Na*
channels
open
+
K
Action potential
-Pha
channels
open
.PK
Time (msec)
(b) Permeability changes for Na* and
K* during an action potential
Membrane permeability (P)

Which phenomenon causes the downward slope of the curve labeled PNa?
Which phenomenon causes the upward slope of the curve labeled PK?
After the peak, the action potential curve begins to slope downward.
What does the downward slope represent?
Which phenomena cause the downward slope?

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