Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 7, Problem 14RA
Summary Introduction
To determine:
Properties of catecholamines.
Introduction:
Catecholamines are a family of neurotransmitters made of dopamine, norepinephrine and epinephrine. They are derived from amino acid tryptophan and have a catechol ring. They function as both neurotransmitters and hormones. They have two self-inactivation mechanisms, one of which is enzymatic and stimulates production of second messengers.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Which of the following statements about dopamine is INCORRECT?
a. Its generation is catalyzed by dihydroxyphenylalanine decarboxylase.
b. It is an endogenous catecholamine.
c. It is derived from tyrosine.
d. It directly requires BH4 in its synthesis
Fill out the following table (the 2 columns on the left)
LTP LTD
Is the following directly associated with the induction of LTP, LTD, both or
neither (check both if both apply, and leave blank if neither apply)?
a. Increased activity of phosphatase I
b. Increased levels of presynaptic Ca²+
c. Postsynaptic hyperpolarization
d. Removal of AMPA receptors from the postsynaptic membrane
e. Postsynaptic depolarization
f. Increased levels of postsynaptic Ca²+
g. Insertion of AMPA receptors into the postsynaptic membrane
h. Presynaptic hyperpolarization
All the B - adrenergic receptors are linked with Gs G-protein. Physiological processes mediated by the intracellular second messenger cyclic AMP include:
YOU CAN CHOOSE MORE THAN ONE
A.carbohydrate breakdown by the liver (glycogenolysis)
B.increased contractility (e.g. increased cardiac contractility)
C.smooth muscle relaxation (e.g. bronchodilation or vasodilation)
D.Triglyceride breakdown (lipolysis)
Chapter 7 Solutions
Human Physiology
Ch. 7 - Draw a neuron, label its parts, and describe the...Ch. 7 - Distinguish between sensory neurons, motor...Ch. 7 - Describe the structure of the neurilemma, and...Ch. 7 - Explain how myelin sheaths are formed in the CNS....Ch. 7 - Explain what is meant by the blood-brain barrier....Ch. 7 - Define the terms depolarization and...Ch. 7 - Prob. 4bCPCh. 7 - Describe how gating of Na+andK+ in the axon...Ch. 7 - Prob. 5aCPCh. 7 - Prob. 5bCP
Ch. 7 - Prob. 6aCPCh. 7 - Describe the location of neurotransmitters within...Ch. 7 - Describe the sequence of events by which action...Ch. 7 - Explain how chemically regulated channels differ...Ch. 7 - Prob. 8CPCh. 7 - Prob. 9aCPCh. 7 - Prob. 9bCPCh. 7 - Prob. 10CPCh. 7 - Prob. 11CPCh. 7 - Prob. 12aCPCh. 7 - Prob. 12bCPCh. 7 - Prob. 13aCPCh. 7 - Prob. 13bCPCh. 7 - Prob. 14aCPCh. 7 - Describe the mechanism of action of glycine and...Ch. 7 - Give examples of endogenous opioid polypeptides,...Ch. 7 - Prob. 15bCPCh. 7 - Prob. 16CPCh. 7 - Prob. 17aCPCh. 7 - Prob. 17bCPCh. 7 - Prob. 17cCPCh. 7 - Prob. 1RACh. 7 - Prob. 2RACh. 7 - Prob. 3RACh. 7 - Prob. 4RACh. 7 - Repolarization of an axon during an action...Ch. 7 - As the strength of a depolarizing stimulus to an...Ch. 7 - Prob. 7RACh. 7 - Which of these is not a characteristic of synaptic...Ch. 7 - Prob. 9RACh. 7 - Prob. 10RACh. 7 - Prob. 11RACh. 7 - Prob. 12RACh. 7 - Prob. 13RACh. 7 - Prob. 14RACh. 7 - Prob. 15RACh. 7 - Prob. 16RACh. 7 - Prob. 17RACh. 7 - Which of these may be produced by the action of...Ch. 7 - Prob. 19RACh. 7 - In a step-by-step manner, explain how the...Ch. 7 - Prob. 21RACh. 7 - Prob. 22RACh. 7 - Prob. 23RACh. 7 - Prob. 24RACh. 7 - Once an EPSP is produced in a dendrite, how does...Ch. 7 - Prob. 26RACh. 7 - List the endogenous opioids in the brain and...Ch. 7 - Explain what is meant by long-term potentiation...Ch. 7 - Prob. 29RACh. 7 - Prob. 30RACh. 7 - Prob. 31RACh. 7 - Prob. 32RACh. 7 - Prob. 33RACh. 7 - Explain the nature of the endocannabinoids....Ch. 7 - Prob. 35RACh. 7 - Prob. 36RACh. 7 - Prob. 37RACh. 7 - Prob. 38RACh. 7 - Prob. 39RACh. 7 - Use the figure below (from figure 7.34) to answer...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- a 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_forwardEpinephrine binds to both β-adrenergic and α-adrenergic receptors. Describe the opposite actions on the effector protein, adenylyl cyclase, elicited by the binding of epinephrine to these two types of receptors. Describe the effect of adding an agonist or antagonist to a β-adrenergic receptor on the activity of adenylyl cyclase.arrow_forwardIn schizophrenia, the neurons affected by dopamine are overstimulated. This condition is treated with drugs like chlorpromazine (Thorazine), which bind to the affected receptors and inhibit the dopamine signal. Does chlorpromazineact as an agonist or antagonist?arrow_forward
- A patient comes into a hospital emergency room sedated and non-responsive. She had been at a college party where she drank many shots of vodka. What is the most likely explanation for her behavioral and physiological symptoms? A. The alcohol increased the actions of GABA at the GABA receptor chloride channel B. The alochol increased dopamine and serotonin activity by running the transporters backwards C. The alcohol blocked the dopamine reuptake transporter D. the alcohol activated serotinin autoreceptors in the brain E. none of the abovearrow_forwardWhich of these may be produced by the action of nitric oxide? a. Dilation of blood vessels b. Erection of the penis c. Relaxation of smooth muscles in the digestive tract d. Long-term potentiation (LTP) among neighboring synapses in the brain e.All of thesearrow_forwardAll of the following are neurotransmitters except a. glutamate b. glycine c. H2S d. GSHarrow_forward
- A patient has been exposed to the organophosphate pesticide malathion,which inactivates acetylcholinesterase. Which of the following symptoms would you predict: blurring of vision, excess tear formation, frequent or involuntary urination, pallor (pale skin), muscle twitching, orcramps? Would atropine be an effective drug to treat the symptoms?(See Clinical Impact 16.2 for the action of atropine.) Explain.arrow_forwardWhat are the synaptic effects of glycine? a. It directly stimulates glutamate receptors. b. It facilitates the effects of glutamate. c. It directly stimulates acetylcholine receptors. d. It facilitates the effects of acetylcholine.arrow_forwardAutonomic neurons whose cell bodies reside in the peripheral nervous system and are activated by action potentials of thoracolumbar origin release: a. epinephrine b. norepinephrine c. acetylcholine d. dopamine e. glutamatearrow_forward
- A neurotransmitter called "GABA" decreases the rate of action potential generation in neurons, but the effect can be overridden by excitatory neurotransmitters. Alcohol binds to the GABA receptor and has the same effect. Alcohol must Select one: a. Cause depolarization in neurons b. Cause hyperpolarization in neurons c. Block calcium entry at the axon terminus d. Block voltage-gated sodium channelsarrow_forwardThe sympathetic postganglionic neurons release only norepinephrine while the adrenal medulla secretes mainly epinephrine (80%) and a small amount of norepinephrine (20%). The sympathetic postganglionic neurons do not secrete epinephrine because; Group of answer choices a. Epinephrine is not as widely used in the nervous system as norepinephrine b. Phenylethanolamine-N-methyltransferase (PNMT) which converts norepinephrine to epinephrine is present in the adrenal medulla, but not in sympathetic postganglionic adrenergic neurons c. Acetylcholine which stimulates the secretion of epinephrine does not act on postganglionic neurons d. Dopamine beta hydroxylase in hyperactive in the adrenal medullaarrow_forwardPropose reagents for the conversion of (B) to (C).arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning
Basic Clinical Lab Competencies for Respiratory C...NursingISBN:9781285244662Author:WhitePublisher:Cengage
BiochemistryBiochemistryISBN:9781305577206Author:Reginald H. Garrett, Charles M. GrishamPublisher:Cengage Learning
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning
Basic Clinical Lab Competencies for Respiratory C...
Nursing
ISBN:9781285244662
Author:White
Publisher:Cengage
Biochemistry
Biochemistry
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Cengage Learning