Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
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Chapter 9, Problem 8RA
Summary Introduction
To determine:
The action of drug atropine with respect to its blocking action in the parasympathetic system.Â
Introduction:
There are various neurotransmitters released by the neurons in order to exert different effects on the target cell. These effects depend upon the receptors present in the target cell. The blockage of the receptors in the target cell can alter the effect of the neurotransmitter. This can be used in the treatement of several medical conditions. The atropine can block the muscarinic cholinergic receptors.
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Give the effects of acetylcholine on the following :
A. gastrointestinal motility & secretory activity.
B. smooth muscles in the uterus, ureters, bladder , bronchioles .
C. constrictor muscles of the iris.
D. salivary, sweat & lacrimal glands. E. Heart
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Atropine
A.Tends to stimulate excitatory (sympathetic) functions.
B.Increaes heart rate.
C.Stimulates parasympathetic function
D.Blocks parasympathetic function
Chapter 9 Solutions
Human Physiology
Ch. 9 - Describe the preganglionic and postganglionic...Ch. 9 - Compare the control of cardiac muscle and smooth...Ch. 9 - Describe the sympathetic pathway from the CNS to...Ch. 9 - Prob. 4CPCh. 9 - Prob. 5CPCh. 9 - Prob. 6CPCh. 9 - Prob. 7CPCh. 9 - Prob. 8CPCh. 9 - Explain how the effects of the sympathetic and...Ch. 9 - Prob. 1RA
Ch. 9 - Prob. 2RACh. 9 - Prob. 3RACh. 9 - Prob. 4RACh. 9 - Which of these fibers release norepinephrine? a....Ch. 9 - Prob. 6RACh. 9 - Prob. 7RACh. 9 - Prob. 8RACh. 9 - Prob. 9RACh. 9 - Prob. 10RACh. 9 - Prob. 11RACh. 9 - A drug that serves as an agonist for ai receptors...Ch. 9 - Prob. 13RACh. 9 - Prob. 14RACh. 9 - Compare the effects of adrenergic and cholinergic...Ch. 9 - Prob. 16RACh. 9 - Prob. 17RACh. 9 - Prob. 18RACh. 9 - Prob. 19RACh. 9 - Prob. 20RACh. 9 - Prob. 21RACh. 9 - Prob. 22RACh. 9 - Prob. 23RACh. 9 - Prob. 24RACh. 9 - Prob. 25RACh. 9 - Prob. 26RACh. 9 - Prob. 27RACh. 9 - Prob. 28RACh. 9 - Prob. 29RACh. 9 - Prob. 30RACh. 9 - Refer to table 7.3 to obtain axon diameters and...
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- Sympathetic nerve stimulation does not causea. the liver to release glycogen.b. the dilation of bronchioles.c. the gastrointestinal tract to digest food.d. an increase in the heart rate.arrow_forwardWhich of the following statements regarding the adrenal gland is true?a. The parasympathetic division stimulates the adrenal gland torelease acetylcholine.b. The parasympathetic division stimulates the adrenal gland to releaseepinephrine.c. The sympathetic division stimulates the adrenal gland torelease acetylcholine.d. The sympathetic division stimulates the adrenal gland to releaseepinephrinearrow_forwarda large increase in norepinephrine following a sudden frightening experience would be release from .A. neurotransmitter effector site B. Post ganglionic axon C.stimulation of the adrenal acetylcholine from preganlionic neuron D.Large storage of acetylechloine at the neuronal bodyarrow_forward
- Which of these statements about catecholamines is false? a.They include norepinephrine, epinephrine, and dopamine. b.Their effects are increased by action of the enzyme catechol-O-methyltransferase. c.They are inactivated by monoamine oxidase. d.They are inactivated by reuptake into the presynaptic axon. e.They may stimulate the production of cyclic AMP in the postsynaptic axon.arrow_forwardSympathetic splanchnic nerves are composed of A. preganglionic sympathetic axons that synapse in a sympathetic trunk ganglion. B. preganglionic sympathetic axons that did not synapse in a sympathetic trunk ganglion. C. postganglionic sympathetic axons that synapse in a sympathetic trunk ganglion. D. postganglionic sympathetic axons that did not synapse in a sympathetic trunk ganglion. E. None of the choices is correct.arrow_forwardWhich of the following is characteristic of psychoactive drugsa. They do not readily cross the blood-brain barrier.b. They alter levels of neurotransmitters.c. They can alter the amplitude of action potentials.d. They alter the speed with which action potentials travel.arrow_forward
- Which of the following statements about α-adrenergic receptor is CORRECT? Select one: a. Activation of the receptor increases blood pressure. b. It is the target of acetylcholine. c. Activation of the receptor decreases heart rate. d. It is expressed predominantly in cardiac tissue. e. Activation of the receptor leads to systemic vasodilation.arrow_forwardIn the autonomic nervous system, AChEls will increase activity of the: a. parasympathetic activity b. sympathetic activity C. both sympathetic and parasympathetic activityarrow_forwardA fight-or-flight response in the body is controlled by thea. sympathetic division of the nervous system.b. parasympathetic division of the nervous system.c. release of acetylcholine from postganglionic neurons.d. somatic nervous system.arrow_forward
- Among the followings which does not indicate the stimulation of parasympathetic system? A. Contriction of skeletal muscle blood and vasodilation of renla blood B. Excitation of the blood flow to the kidneys and smooth muscles of Gl tract C. Inhibition of heart rate and amooth muscles of the urinary bladder Excitation of the smooth muscles of the urinary bladder and Gl tractarrow_forwardRemoval of adrenergic neurons in the brain with a neurotoxin impairs hippocampal LTP. a. true b. falsearrow_forwardWhich of the following is not associated with sympathetic stimulation? a. arteriolar dilation in skeletal muscle b. flight or fight c. preparation for energy expenditure d. diffuse effects e. small intestine absorption of nutrients.arrow_forward
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