Human Anatomy (8th Edition) - Standalone book
8th Edition
ISBN: 9780321883322
Author: Frederic H. Martini, Robert B. Tallitsch
Publisher: PEARSON
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Textbook Question
Chapter 13, Problem 14RFT
Axons terminate in a series of fine extensions known as
(a) telodendria.
(b) synapses.
(c) collaterals.
(d) hillocks.
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(a) Contrast unipolar, bipolar, and multipolar neurons structurally. (b) Indicate where each is most likely to be found.
Both electrical and chemical synapses trigger passage of ions across the post-synaptic membrane. (i) Which one of these
synapses also allows passage of molecules other than ions across the post-synaptic membrane? (ii) What purpose does an
electrical synapse serve?
A. Electrical synapse; (ii) dissociate neuronal firing among a group of neurons
B. Chemical synapse, (ii) to synthesize IP3
C. (i) Chemical synapse, (ii) slow neurotransmission
D. Chemical synapse, (ii) silence neuronal firing
O E. (i) Electrical synapse, (ii) fast neurotransmission for synchronized firing
The loss of positive ions from the interior of a neuron produces, (a) depolarization. (b) threshold. (c) hyperpolarization. (d) an action potential.
Chapter 13 Solutions
Human Anatomy (8th Edition) - Standalone book
Ch. 13 - Match each numbered item with the most closely...Ch. 13 - Prob. 2RFTCh. 13 - Prob. 3RFTCh. 13 - Match each numbered item with the most closely...Ch. 13 - Match each numbered item with the most closely...Ch. 13 - Match each numbered item with the most closely...Ch. 13 - Prob. 7RFTCh. 13 - Prob. 8RFTCh. 13 - Prob. 9RFTCh. 13 - Prob. 10RFT
Ch. 13 - 11. Which of the following is not a function of...Ch. 13 - Neuroglia found surrounding the cell bodies of...Ch. 13 - The most important function of the cell body of a...Ch. 13 - Fill in the blanks below with the proper...Ch. 13 - 15. Axons terminate in a series of fine extensions...Ch. 13 - Prob. 15RFTCh. 13 - Prob. 1RCCh. 13 - Prob. 2RCCh. 13 - 3. Developmental problems in the growth and...Ch. 13 - Prob. 4RCCh. 13 - How does exteroceptor activity differ from...Ch. 13 - Prob. 6RCCh. 13 - Prob. 7RCCh. 13 - Prob. 8RCCh. 13 - Prob. 9RCCh. 13 - Prob. 10RCCh. 13 - Prob. 1CTCh. 13 - Prob. 2CTCh. 13 - Prob. 3CT
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- Which of the following is the most direct result of depolarizingthe presynaptic membrane of an axon terminal?(A) Voltage-gated calcium channels in the membrane open.(B) Synaptic vesicles fuse with the membrane.(C) Ligand-gated channels open, allowing neurotransmittersto enter the synaptic cleft.(D) An EPSP or IPSP is generated in the postsynaptic cell.arrow_forwardSelect the best answer or answers from the choices given: The anatomical region of a multipolar neuron where the AP is initiated is the (a) soma, (b) dendrites, (c) axon hillock, (d) distal axon.arrow_forwardA common feature of action potentials is that they(A) cause the membrane to hyperpolarize and then depolarize.(B) can undergo temporal and spatial summation.(C) are triggered by a depolarization that reaches threshold.(D) move at the same speed along all axons.arrow_forward
- Myelin in the CNS is produced by (a) astrocytes, (b) microglial cells, (c) oligodendrocytes, (d) ependymal cells.arrow_forwardMatch the names of the supporting cells found in column B with the appropriate descriptions in column A.arrow_forwardThe myelin sheath is produced around axons in the PNS by (a) ganglia (b) neuron cell bodies (c) dendrites (d) Schwann cells (e) oligodendrocytesarrow_forward
- Why are action potentials usually conducted in one direction?(A) Ions can flow along the axon in only one direction.(B) The brief refractory period prevents reopening of voltagegated Na+channels.(C) The axon hillock has a higher membrane potential thanthe terminals of the axon.(D) Voltage-gated channels for both Na+and K+open in onlyone direction.arrow_forwardThere is always a synapse between the CNS and the peripheral effector in, (a) the ANS. (b) the SNS. (c) a reflex arc. (d) a, b, and c are correct.arrow_forwardMatch cells and function : Oligodendrocyte , Astrocytes 1. .......................... enhances the velocity of electrical transmission of an action potential along an axon in the CNS. 2. .......................... glial cells act locally to maintain normal electrolyte composition of the cerebrospinal fluid.arrow_forward
- The initial rise in the membrane potential of an axon upon stimulation is called the........... phase of the ...............arrow_forwardNeurons have an electrical charge across their membranes called the resting potential when they are not being stimulated, From inside this potential has................charged. When a neuron receives a sufficiently large stimulus, and reaches a potential called the….…..…... ‚it produces an action potential. This causes the neuron to become.................charged inside.arrow_forwardMatch the names of the cells in column B with the function they perform, shown in column A.Column A Column B(1) line the central cavity of the brain (a) astrocytes(2) form myelin in the CNS (b) ependymal cells(3) form myelin in the PNS (c) microglial cells(4) remove neurotransmitters in the CNS (d) oligodendrocytes(5) regulate ionic composition of thefluid around neurons in the CNS (e) satellite cells (f) Schwann cells(6) CNS phagocytesarrow_forward
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