Anatomy & Physiology: An Integrative Approach
2nd Edition
ISBN: 9780078024283
Author: Michael McKinley Dr., Valerie O'Loughlin, Theresa Bidle
Publisher: McGraw-Hill Education
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Chapter 12, Problem 4DYKB
Summary Introduction
Introduction:
A neuron is a basic functional unit of the nervous system and is the specialized cells of the nervous system that makes a complex network for the transmission of the message. A neuron is made up of a cell body, nerve fibers: dendrites and an axon in its structure.
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What guarantees that there are unidirectional action potentials?
Choice
A threshold
B. Depolarization refractory period
C. Absolute refractory period
Relative refractory period
Which of these is least likely to trigger an action potential in a post-synaptic cell?
A)EPSPs and IPSPs arrive simultaneously at multiple synapses.
B)The other choices are equally likely to trigger an action potential.
C)Single EPSPs arrive simultaneously at multiple synapses.
D)Multiple EPSPs arrive rapidly at a single synapse.
When summation of multiple graded synaptic potentials occurs which of the following would "neutralize/cancel out" an EPSP in dendrites?
A. opening a voltage gated sodium channel
B. opening a voltage gated calcium channel
C. openning a ligand gated calcium channel
D. closing a ligand gated potassium channel
E. opening a ligand gated chloride channel
Chapter 12 Solutions
Anatomy & Physiology: An Integrative Approach
Ch. 12.1 - Prob. 1WDYLCh. 12.1 - What are the two primary functional divisions of...Ch. 12.2 - Prob. 3WDYLCh. 12.2 - Prob. 4WDYLCh. 12.2 - Prob. 5WDYLCh. 12.2 - Prob. 6WDYLCh. 12.2 - Prob. 7WDYLCh. 12.2 - What are the three connective tissue wrappings in...Ch. 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. 12.9 - Prob. 29WDYLCh. 12.10 - Prob. 30WDYLCh. 12.10 - Prob. 31WDYLCh. 12.11 - Prob. 32WDYLCh. 12.11 - Prob. 33WDYLCh. 12 - _____ 1. The cell body of a neuron does all of the...Ch. 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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- Neurons contain ________, which can receive signals from other neurons. a. axons b. mitochondria c. dendrites d. Golgibodiesarrow_forwardThe neuron activated in a candlelit room is called a ___.arrow_forwardAt maximal stimulation, much above threshold, how long will it be until an axon fires the next AP? A.The absolute refractory period B.The relative refractory period C.The absolute and relative refractory periodsarrow_forward
- Neurotransmitters are released by_____ . a. axon terminals c. dendrites b. a neuron cell body d. glial cellsarrow_forwardLidocaine is an anesthetic that is used to prevent the propagation of action potentials. Which compartment would lidocaine MOST likely target? A. axon B. dendrite C. soma D. synaptic cleftarrow_forwardIn discussing nuerites, neurons typically have one __, but many ___. A. Axon; dendrites B. Dendrites;axons C. Cell body; axons D. Dendrites; cell bodiesarrow_forward
- After the depolarisation phase of an action potential, the resting potential is restored by ______. Question 15 options: A) the opening of voltage-gated potassium channels and the closing or inactivation of sodium channels. B) the opening of more voltage-gated sodium channels. C) a decrease in the membrane's permeability to potassium and chloride ions following closing of the chloride-potassium pump. D) a brief inhibition of the sodium-potassium pump.arrow_forwardNerve membrane hyperpolarization after an action potential a)Is the movement of membrane potential voltage below normal resting potential voltage. b) This Is mostly due to the slow-closing of K+ channels. c)Makes it more difficult to evoke another action potential. d) This Is mostly due to the slow-closing of Na+ channels.arrow_forwardanatomy and psychology Choise What guarantees that there are unidirectional action potential? A. threshold B. depolarization refractory period C. absolute refractory period D. relative refractory periodarrow_forward
- increases the probability of producing an action potential, where a ________ decreases the probability of producing an action potential. A. threshold; hyperpolarization B. repolarization; depolarization C. depolarization; hyperpolarization D. hyperpolarization; depolarization E. depolarization, repolarizationarrow_forwardDuring an action potential _______ A. Na+ flows out of cell and causes depolarization B. K+ flows into cell and causes repolarization C. Na+ flows into cell and causes depolarization D. K+ flows into cell and causes hyperpolarizationarrow_forwardPost synaptic neurons membrane potentials are less negative than resting membrane potentials when this occur A. Creates a new set point for the resting membrane potential B. Has a lower propensity to produce an action potential C. Reacts by generating action potential D. Higher chance of reaching the potential thresholdarrow_forward
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