Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Textbook Question
Chapter 39, Problem 2MC
Neurotransmitters are typically released by a
a. presynaptic neuron.
b. postsynaptic neuron.
c. muscle cell.
d. gland cell.
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Which one of the following statements about gap junctions or electrical synapses is incorrect? A. Abundant gap junctions between cardiac muscle cells allow coordinated waves of contraction to spread through the heart muscle. B. Synaptic delays at electrical synapses are shorter than synaptic delays at chemical synapses. C. Gap junctions at electrical synapses are formed from proteins made in both the presynaptic and postsynaptic cells. D. Electrical synapses can be either excitatory or inhibitory. E. Electrical synapses are inherently bidirectional, i.e., current can spread between two coupled cells in either direction
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Which of the following statements about the functional divisions of the nervous system is false?a. Somatic sensory neurons carry signals from a range of sources like skeletal muscles, the skin, and special sensory organs.b. Visceral sensory neurons carry signals from organs such as the heart and kidneys to the spinal cord and brain.c. Somatic motor neurons regulate involuntary secretions from glands and the contraction of smooth and cardiac muscles.d. The autonomic nervous system is a key regulator of homeostasisin the body.
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A. A neuron that releases a neurotransmitter into a synapse
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Chapter 39 Solutions
Biology
Ch. 39.1 - describe the structure of a typical neuron?Ch. 39.1 - Prob. 2CYLCh. 39.2 - Prob. 1TCCh. 39.2 - Prob. 1CSCCh. 39.2 - Prob. 1CYLCh. 39.2 - explain how an action potential in a presynaptic...Ch. 39.2 - Prob. 3CYLCh. 39.3 - Prob. 1TCCh. 39.3 - Prob. 1CYLCh. 39.3 - Prob. 2CYL
Ch. 39.3 - explain how the brain determines which muscles to...Ch. 39.4 - describe the anatomy of diffuse and centralized...Ch. 39.5 - John comes to the emergency room with neither...Ch. 39.5 - Prob. 1CSCCh. 39.5 - Prob. 2TCCh. 39.5 - Prob. 1CTCh. 39.5 - Prob. 1HYEWCh. 39.5 - distinguish between the central and peripheral...Ch. 39.5 - Prob. 2CYLCh. 39.5 - label diagrams of the human brain and spinal cord,...Ch. 39.5 - Prob. 4CYLCh. 39.5 - Prob. 5CYLCh. 39.5 - Prob. 2CTCh. 39 - Prob. 1MCCh. 39 - Neurotransmitters are typically released by a a....Ch. 39 - Automatic bodily functions such as breathing and...Ch. 39 - Prob. 4MCCh. 39 - Prob. 5MCCh. 39 - Prob. 1FIBCh. 39 - Prob. 2FIBCh. 39 - Prob. 3FIBCh. 39 - Prob. 4FIBCh. 39 - Prob. 5FIBCh. 39 - Prob. 6FIBCh. 39 - Prob. 1RQCh. 39 - Prob. 2RQCh. 39 - What are the four elements of a neuronal pathway,...Ch. 39 - Prob. 4RQCh. 39 - Prob. 5RQCh. 39 - Prob. 6RQCh. 39 - Explain the differences between short-term memory...Ch. 39 - Prob. 1ACCh. 39 - Prob. 2AC
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- Define the following terms: a. lecithin b. phosphatidylcholine c. cardiolipin d. GPI anchors e. respiratory distress syndromearrow_forwardA synapse includes: a. a very narrow synaptic cleft b. a presynaptic neuron with neurotransmitter receptor sites on its membrane c. a postsynaptic neuron that releases the neurotransmitter d. all of the above The upper abdominopelvic regions include the: a. right and left iliac and epigastric b. right and left lumbar and umbilical c. right and left hypochondriac and epigastric d. right and left hypochondriac and umbilical A decrease in insulin production: a. usually causes type I diabetes mellitus b. will stimulate the release of growth hormone c. is usually the cause of type II diabetes mellitus d. both a and c abovearrow_forwardWhich of the following is true about the conduction of action potentials? a. Thicker axons are faster because there is more surface area on thicker axons. b. Myelin speeds conduction because the glial cells add voltage gated Na+ channels to the neuron. c. Diffusion of Na+ ions between the Nodes of Ranvier happens faster than the wave of opening and closing membrane proteins can travel. d. Neurons that don’t have myelin sheaths undergo saltatory conduction e. Action potentials move slowly.arrow_forward
- In an experiment you place a neuron and its synaptic contacts into a medium containing no calcium ions. You stimulate the neuron causing an action potential to propagate down the axon into the axon terminal of the neuron. 3.) What is the most likely result of this experimental manipulation? A. Prolong the refractory period of the action potential B. Decrease the time required to move sodium ions out of the axon terminal C. Prevent neurotransmitter from binding to receptors on postsynaptic cells D. Enhance the voltage changes associated with the action potential E. Prevent release of neurotransmitter into the synapsearrow_forwardWhat determines the effect of neurotransmitter release on the post-synaptic neurons? a. the size of the action potential. b. the post-synaptic receptors c. the neurotransmitter contained in the synaptic vesicles. d. the concentration of calcium ions reached in presynaptic terminals. e. the size of the synaptic vesicles.arrow_forwardI. These forms the specialized junctions called synapse. A. Cell body B. Glial cells C. Synaptic terminal D. Neurotransmitters II. These are the gaps in the myelin sheath which is the site where signals are recharged as they travel down the axon. A. Neurotransmitters B. Axon hillock C. Dendrites D. Nodes of Ranvier III. These neurons form the local circuits that connect neurons in the brain A. Interneurons B. Axon hillock C. Dendrites D. Somaarrow_forward
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- Which one is correct about the AP conduction velocity of nerve fiber A. Increase of the temperature within physiological limit will increase the conduction velocity. B. The fiber with big diameter always conducts faster. C. The increase of extracellular K+ will increase the conduction velocity D. Myelination of nerve fiber always decreases the conduction velocity. E. Anesthesia do not influence the conduction velocity.arrow_forwardA neuron without an axon would be unable to a. conduct nerve impulses b. divide c. receive stimulation from other neurons d. store genetic materialarrow_forwardPost-synaptic acetylcholine receptors are blocked by A.Calcium ions B.Atropine C.Nerve gases D.Curarearrow_forward
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