Anatomy & Physiology
5th Edition
ISBN: 9780321861580
Author: Marieb, Elaine N.
Publisher: Pearson College Div
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Textbook Question
Chapter 9, Problem 10RQ
The neurotransmitter released by somatic motor neurons is (a) acetylcholine, (b) acetylcholinesterase, (c) norepinephrine.
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Which of the following is NOT true statement about acetylcholine? *
A) Acetylcholine stimulates a muscle to contract
B) Acetylcholine binds to receptors on the sarcolemma
C)Acetylcholine enters muscle fiber when stimulated
D)Acetylcholine is released into a synaptic cleft
Binding of neurotransmitter to the motor end plate leads to depolarization because the neurotransmitter:
a) opens ligand-gated sodium channels.
b) opens voltage-gated sodium channels.
c) opens ligand-gated potassium channels.
d) opens voltage-gated potassium channels.
Select the best answer or answers from the choices given: Inhibition of acetylcholinesterase by poisoning blocks neurotransmission at the neuromuscular junction because (a) ACh is no longer released by the presynaptic terminal, (b) ACh synthesis in the presynaptic terminal is blocked, (c) ACh is not degraded, hence prolonged depolarization is enforced onthe postsynaptic cell, (d) ACh is blocked from attaching to the postsynaptic ACh receptors.
Chapter 9 Solutions
Anatomy & Physiology
Ch. 9 - When describing muscle, what does striated mean?Ch. 9 - Prob. 2CYUCh. 9 - How does the term epimysium relate to the role and...Ch. 9 - Which myofilaments have binding sites for calcium?...Ch. 9 - Which region or organelle-cytosol, mitochondrion,...Ch. 9 - What are the three structural components of a...Ch. 9 - What is the final trigger for contraction? What is...Ch. 9 - What prevents the filaments from sliding back to...Ch. 9 - What would happen if a muscle fiber suddenly ran...Ch. 9 - What is a motor unit?
Ch. 9 - What is happening in the muscle during the latent...Ch. 9 - Prob. 12CYUCh. 9 - When Eric returned from jogging, he was breathing...Ch. 9 - List two factors that influence contractile force...Ch. 9 - Prob. 15CYUCh. 9 - How do aerobic and resistance exercise differ in...Ch. 9 - Compare the structures of skeletal and smooth...Ch. 9 - Calcium is the trigger for contraction of all...Ch. 9 - How does the stress-relaxation response suit the...Ch. 9 - The connective tissue covering that encloses the...Ch. 9 - Prob. 2RQCh. 9 - Prob. 3RQCh. 9 - Prob. 4RQCh. 9 - Prob. 5RQCh. 9 - Contraction elicited by a single brief stimulus is...Ch. 9 - A smooth, sustained contraction resulting from...Ch. 9 - Characteristics of isometric contractions include...Ch. 9 - During muscle contraction, ATP is provided by (a)...Ch. 9 - The neurotransmitter released by somatic motor...Ch. 9 - The ions that enter the skeletal muscle cell...Ch. 9 - Myoglobin has a special function in muscle tissue....Ch. 9 - 13. Aerobic exercise results in all of the...Ch. 9 - The smooth muscle type found in the walls of...Ch. 9 - Name and describe the four special functional...Ch. 9 - Distinguish between (a) direct and indirect muscle...Ch. 9 - (a) Describe the structure of a sarcomere and...Ch. 9 - What is the importance of acetylcholinesterase in...Ch. 9 - Explain how a slight (but smooth) contraction...Ch. 9 - Explain what is meant by the term...Ch. 9 - Define and draw a motor unit.Ch. 9 - Describe the three distinct types of skeletal...Ch. 9 - True or false: Most muscles contain a predominance...Ch. 9 - Describe some cause(s) of muscle fatigue and...Ch. 9 - Define EPOC.Ch. 9 - Smooth muscle has some unique properties, such as...Ch. 9 - Lets continue our tale of Mrs. DeStephanos medical...Ch. 9 - Lets continue our tale of Mrs. DeStephanos medical...Ch. 9 - Lets continue our tale of Mrs. DeStephanos medical...Ch. 9 - Lets continue our tale of Mrs. DeStephanos medical...
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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
- Discuss the concept of termination of neurotransmitter action by comparing the mechanisms by which acetylcholine and nitric oxide's actions are terminated. (a) Name the three primary mediators of purinergic receptors. (b) Which one of these mediators is sometimes used to treat supraventricular tachycardia? (c) Explain why the drug in (b) is considered safer than verapamil in the treatment of supraventricular tachycardia?arrow_forwardAcetylecholine is typically associated with the opening of ___________________ in the synapses of the motor cortex resulting in __________________________. a.) Ligand-gated sodium channels; hyperpolarization b.) Calcium channels; depolarization c.) Calcium channels; hyperpolarization d.) Ligand-gated sodium channels; depolarizationarrow_forwardAcetylcholinesterase contributes to ... Group of answer options .. that the inhibitory effect of glycine is prolonged. ... shorter operating time of the transmitter at the nerve-muscle coupling. ... increased amount of transmitters for muscle contraction. ... excess GABA is broken downarrow_forward
- A synapse between a terminal bouton and a neuron cell body is classified as (a) axodendritic, (b) axoaxonic, (c) axosomatic, (d) axoneuronic.arrow_forward48) which of the following occurs when acetylcholine is released from somatic nervous system? a) sometimes an EPSP, sometimes and IPSP b) skeletal muscle relaxation c) EPSP every time d) IPSP every timearrow_forwardName two defining properties of neurotransmitters.arrow_forward
- Caffeine is known to alter transmembrane movement of calcium. What are two possible sites in the nerve and/or muscle that caffeine can act upon?arrow_forwardNeurotransmitters that influence the effect of other neurotransmitters when released at the same time are called: A) major neurotransmitters B) neuromodulators C) excitatory neurotransmitters D) inhibitory neurotransmittersarrow_forwardA 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_forward
- Which of the following is not true regarding the parasympathetic nervous system? (A) The cell body of the presynaptic neuron is located in the gray matter of the CNS. (B) The cell body of the postsynaptic neuron is located in an autonomic ganglion out- side the CNS. (C) The postsynaptic neuron emits norepi- nephrine. (D) Its neurons are craniosacral in origin. (E) It promotes quiet and orderly processes of the body.arrow_forwardSarin gas is an inhibitor of acetylcholinesterase used in chemical warfare. Briefly (in 1 sentence or less) explain how sarin causes: a) increased urination b) tachycardia (rapid heartrate)arrow_forwardCaffeine prolongs the life span of acetylcholine molecules in the motor junctions. Explain how this fact is related to caffeine’s tendency to cause jitters, such as hand tremors and other small involuntary contractions.arrow_forward
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