9. The irritation of skin receptors of backextremity of a spinal preparation of a frog by0,5 % sulfuric acid solution leads towithdrawal reflex of extremity with smallamplitude while the irritation by 1,0%sulfuric acid solution increases amplitude ofwithdrawal reflex of the extremity thanks tooccurrence in receptors:A. Action potentials with moreamplitudesB. Decrease of the threshold ofdepolarizationC. Increase of the magnitude ofreceptor potentialincrease of receptive fieldD.

Answered: 9. The irritation of skin receptors of…

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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9. The irritation of skin receptors of back
extremity of a spinal preparation of a frog by
0,5 % sulfuric acid solution leads to
withdrawal reflex of extremity with small
amplitude while the irritation by 1,0%
sulfuric acid solution increases amplitude of
withdrawal reflex of the extremity thanks to
occurrence in receptors:
A. Action potentials with more
amplitudes
B. Decrease of the threshold of
depolarization
C. Increase of the magnitude of
receptor potential
increase of receptive field
D.

Expert Solution

Step 1

Normal resting membrane potential is about - 70 millivolt that occurs due to the operation of Sodium Potassium pump and the presence and operation of several potassium Leak channels. All these are responsible for the negative charges to develop inside in comparison to outside but when there is a stimulus it changes the whole scenario and opens up positively charged sodium ion gated channels to let inside sodium ions. This causes the reversal of the potential and this stage is called depolarisation which is the first step in action potential.

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