A&P INTEG APPRCH LL
4th Edition
ISBN: 9781266242748
Author: McKinley
Publisher: MCG
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Chapter 12, Problem 1CAL
Summary Introduction
Introduction:
Anterograde transport describes the movement of molecules from the cell body to synaptic knobs. Retrograde transport describes the movement of molecules from the synaptic knob to the cell body. The axonal transport is further subdivided into two types: fast axonal transport and slow axonal transport, on the basis of the speed of molecules’ movement.
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When an action potential arrives in an axon terminal, synaptic vesicles containing acetylcholine are released by: a. facilitated diffusion. b. osmosis. c. exocytosis. d. endocytosis.
What does a transporter protein do at a synapse? a. It carries neurotransmitter molecules from the presynaptic neuron to the postsynaptic neuron. b. It carries neurotransmitter molecules from the cell body to the presynaptic terminal. c. It carries neurotransmitter molecules from neurons that have too much into neurons that need more. d. It pumps used neurotransmitter molecules back into the presynaptic neuron.
How are vesicles with neurotransmitter transported to the synaptic cleft? A. Retrograde, slow transport. B. Anterograde, slow transport. C. Retrograde, fast transport. D. Anterograde, fast transport.
Chapter 12 Solutions
A&P INTEG APPRCH LL
Ch. 12.1 - Prob. 1WDYLCh. 12.1 - Prob. 2WDYLCh. 12.1 - Prob. 3WDYLCh. 12.2 - Prob. 4WDYLCh. 12.2 - Prob. 5WDYLCh. 12.2 - Prob. 6WDYLCh. 12.2 - Prob. 7WDYLCh. 12.2 - Prob. 8WDYLCh. 12.3 - Prob. 9WDYLCh. 12.4 - If a person has a brain tumor, is it more likely...
Ch. 12.4 - Prob. 11WDYLCh. 12.4 - Prob. 12WDYLCh. 12.4 - Prob. 13WDYLCh. 12.5 - Prob. 14WDYLCh. 12.5 - Prob. 15WDYLCh. 12.6 - Prob. 16WDYLCh. 12.6 - Prob. 17WDYLCh. 12.7 - Prob. 18WDYLCh. 12.7 - Prob. 19WDYLCh. 12.7 - Prob. 20WDYLCh. 12.8 - How are EPSP and IPSP graded potentials...Ch. 12.8 - Prob. 22WDYLCh. 12.8 - How does depolarization and repolarization occur...Ch. 12.8 - Prob. 24WDYLCh. 12.8 - Prob. 25WDYLCh. 12.9 - Prob. 26WDYLCh. 12.9 - Prob. 27WDYLCh. 12.9 - Prob. 28WDYLCh. 12.10 - Prob. 29WDYLCh. 12.10 - Prob. 30WDYLCh. 12.10 - Prob. 31WDYLCh. 12.11 - Prob. 32WDYLCh. 12.11 - Prob. 33WDYLCh. 12 - Prob. 1DYKBCh. 12 - Prob. 2DYKBCh. 12 - Prob. 3DYKBCh. 12 - Prob. 4DYKBCh. 12 - Prob. 5DYKBCh. 12 - Prob. 6DYKBCh. 12 - _____ 7. An action potential is generated when...Ch. 12 - Prob. 8DYKBCh. 12 - Prob. 9DYKBCh. 12 - Prob. 10DYKBCh. 12 - What are the four structural types of neurons? How...Ch. 12 - Prob. 12DYKBCh. 12 - How does myelination differ between the CNS and...Ch. 12 - Describe the procedure by which a PNS axon may...Ch. 12 - Prob. 15DYKBCh. 12 - Prob. 16DYKBCh. 12 - Explain summation of EPSPs and IPSPs and the...Ch. 12 - Graph and explain the events associated with an...Ch. 12 - Prob. 19DYKBCh. 12 - Prob. 20DYKBCh. 12 - Prob. 1CALCh. 12 - Prob. 2CALCh. 12 - Prob. 3CALCh. 12 - Prob. 4CALCh. 12 - Sarah wants to call her new friend Julie and needs...Ch. 12 - Over a period of 6 to 9 months, Marianne began to...Ch. 12 - Prob. 2CSLCh. 12 - Prob. 3CSL
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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 Please give me the correct answer quickly I will give you upvotearrow_forwardA perturbation that alters the membrane potential at a site on a neuronal axon will pass to neighboring segments of the axon by... a. electronic spead b. active transport c. symport d. antiport e. facilitated diffusionarrow_forwardA neuron must reach threshold to fire an action potential. In this context, threshold refers to which event? a. voltage at which damage occurs to the membrane because of the electrical charge b. the voltage at which potassium ions begin to flow in and out of the cell c. the voltage at which voltage-gated sodium channels open d. the voltage at which the neuron can no longer produce an action potential According to studies in developing rodents, testosterone treatment causes detectable changes in: a. the sex region Y gene b. the thalamus c. the hypothalamus d. alpha-fetoproteinarrow_forward
- Which of the following is not a way neuroglia cells help neurons? A. Provide support and protection B. Speed up electrical signals C. Provide nutrients D. Send electrical signals themselvesarrow_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_forwardIn 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_forward
- I. 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_forwardJose measures membrane potential in two neighboring cells. He notices that when the membrane potential changes in one cell, the membrane potential of the neighboring cell changes in a similar manner. For example, if one cell hyperpolarizes, the neighboring cell also hyperpolarizes. He concludes the cells are electrically coupled. Which of the following is the most likely to cause the electrical coupling? a.) The electrical coupling is most probably due to integrins that connect the two cells. b.) The electrical coupling is most probably due to tight junctions that connect the two cells. c.) The electrical coupling is most probably due to desmosomes that connect the two cells. d.) The electrical coupling is most probably due to gap junctions that connect the two cells.arrow_forwardDepolarization and repolarization changes that occur during the action potential are produced by a. Negative feedback loops b. Channel mediated transport c. Simple diffusion of ions down their concentration gradient d. Active transport pumps along the neuron membranearrow_forward
- Which of the following statements does NOT correctly describe the repolarization of a neuron? a. The potassium channels are slower to open, allowing the potassium ions to leave after depolarization. b. The potassium ions leave the cell, thereby returning the neuron to its resting potential. c. The neuron becomes more polarized and more negatively charged than its original resting membrane potential. d. The sodium and potassium channels open, allowing the positive ions to move out of the cell.arrow_forwardWhich of the fallowing is required to generate a membrane potential? I. A concentration gradient of ions II. Presence of neurotransmitters II. Semipermeable membrane a) II only b) I only c) II and III d) I and IIIarrow_forwarda) How does E allow faster transmission of signals? b) What would happen if G has a lack of Calcium? c) Most neurons have the style of junction (chemical) shown in the diagram, rather than gap (electrical) junctions. Why does this make sense?arrow_forward
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