Fundamentals of Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134396026
Author: Frederic H. Martini, Judi L. Nath, Edwin F. Bartholomew
Publisher: PEARSON
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Question
Chapter 16, Problem 31RQ
Summary Introduction
To determine:
The neurotransmitter to which the given molecule is mimicking and also the receptors to which it is binding.
Concept introduction:
The sympathetic nervous system releases norepinephrine as neurotransmitter at the target organs and tissues, to produce the desired physiological effects. The norepinephrine binds to adrenergic receptors on the plasma membrane and activates the G-protein. The G-protein then produces the effects through the second messengers and other intermediaries.
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When the neurotransmitter acetylcholine (ACh) binds the acetylcholine receptor (a GPCR) on muscle cells, it causes them to contract. ZIGGY, a chemical analog of ACh, also binds to the same acetylcholine receptor on muscle cells, but instead causes the muscle cells to relax. For this reason, it is sometimes prescribed as a muscle relaxer. Explain in 3-4 sentences how ZIGGY could cause muscle relaxation.
How can both ZIGGY and ACh bind the same GPCR? And then how can they have different effects on the cells, despite binding to the same receptor on the same cells?
Botox has become popular for reducing wrinkles. It is a dilute solution of a toxin which inhibits muscle contraction by working at the presynaptic portion of the NMJ. Which of the following could be a possible mechanism for Botox wrinkle-reducing action?
a.) Increase Calcium influx
b.) Cleave (degrade) syntaxin
c.) Increase sensitivity of synaptotagmin to Ca
d.) Decrease synthesis of nSec1
are these True or False?
Receptors on the post-synaptic cell membrane that bind the acetylcholine are voltage-gated channels (channels that open in response to a change in the electrical charge of the membrane).
When a muscle cell is not contracting its cell membrane is negative on the inner surface.
The effect of a neurotransmitter on the muscle cell membrane is to modify its ion permeability properties temporarily.
Chapter 16 Solutions
Fundamentals of Anatomy & Physiology (11th Edition)
Ch. 16 - Prob. 1CPCh. 16 - Prob. 2CPCh. 16 - Prob. 3CPCh. 16 - Prob. 4CPCh. 16 - Prob. 5CPCh. 16 - Prob. 6CPCh. 16 - Prob. 7CPCh. 16 - Prob. 8CPCh. 16 - Prob. 9CPCh. 16 - Prob. 10CP
Ch. 16 - Name the two types of cholinergic receptors on the...Ch. 16 - Prob. 12CPCh. 16 - Prob. 13CPCh. 16 - Prob. 14CPCh. 16 - Prob. 15CPCh. 16 - Prob. 16CPCh. 16 - Prob. 17CPCh. 16 - Prob. 18CPCh. 16 - Prob. 19CPCh. 16 - Prob. 20CPCh. 16 - Prob. 21CPCh. 16 - Prob. 22CPCh. 16 - Prob. 23CPCh. 16 - Prob. 24CPCh. 16 - Prob. 25CPCh. 16 - Prob. 26CPCh. 16 - Prob. 27CPCh. 16 - Prob. 28CPCh. 16 - Prob. 1RQCh. 16 - Prob. 2RQCh. 16 - Prob. 3RQCh. 16 - Prob. 4RQCh. 16 - Prob. 5RQCh. 16 - Prob. 6RQCh. 16 - Prob. 7RQCh. 16 - What are the components of a visceral reflex arc?Ch. 16 - Prob. 9RQCh. 16 - Prob. 10RQCh. 16 - Prob. 11RQCh. 16 - All preganglionic autonomic fibers release _____...Ch. 16 - Prob. 13RQCh. 16 - Prob. 14RQCh. 16 - Prob. 15RQCh. 16 - Prob. 16RQCh. 16 - Prob. 17RQCh. 16 - Prob. 18RQCh. 16 - Prob. 19RQCh. 16 - Prob. 20RQCh. 16 - Prob. 21RQCh. 16 - Prob. 22RQCh. 16 - Prob. 23RQCh. 16 - Prob. 24RQCh. 16 - Prob. 25RQCh. 16 - Prob. 26RQCh. 16 - Prob. 27RQCh. 16 - Prob. 28RQCh. 16 - Prob. 29RQCh. 16 - Prob. 30RQCh. 16 - Prob. 31RQCh. 16 - Prob. 1CCCh. 16 - Prob. 2CCCh. 16 - Prob. 3CC
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