Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 32, Problem 4SQ
True or false? Action potentials vary in their size
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An action potential is a rapid sequence of changes involving _______________________ and repolarization.
rearrange these in the correct order of events in an action potential.
True or False: Neurotransmitters have different shapes.
Chapter 32 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 32 - ___ relay messages from the brain and .spinal cord...Ch. 32 - Prob. 1DAACh. 32 - Prob. 2DAACh. 32 - Prob. 3DAACh. 32 - Prob. 4DAACh. 32 - When a neuron is at rest, ______ a. it is at...Ch. 32 - Action potentials occur when ________ a. a neuron...Ch. 32 - True or false? Action potentials vary in their...Ch. 32 - Neurotransmitters are released by _______ a. axon...Ch. 32 - What chemicals is released by the axon terminals...
Ch. 32 - Which neurotransmitter is important in...Ch. 32 - Skeletal muscles are controlled by _________ a....Ch. 32 - When you sit quietly on the couch and read, output...Ch. 32 - Dorsal root ganglia contain _______ of sensory...Ch. 32 - Prob. 11SQCh. 32 - Neurons are arrested in ________ of the cell...Ch. 32 - Prob. 13SQCh. 32 - Commands to move your right arm start in the...Ch. 32 - Match each item with its description. ___ gray...Ch. 32 - Prob. 1CTCh. 32 - In human newborns, especially premature ones, the...
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- Neuronal integration refers to the ability of neurons to respond to the combined effect of several EPSPs and IPSPs True Falsearrow_forwardTrue or false and explain why. According to the Goldman equation, resting membrane potential of a neuron will become more positive than the typical -70 mV if concentration of extracellular Na is increased above the normal levels but the permeability of the membrane to Na+ is the same.arrow_forwardBe able to describe the resting membrane potential of a neuron what is possibly happening versus what is actively happening to maintain negative -70mvarrow_forward
- Subject: Neurophysiology During an action potential the Na+ current is inward and K+ current is outward. You may have been surprised to learn that the intracellular concentration of those ions does not change even after many action potentials. Why not?arrow_forwardTrue or false: Neurotransmitters are a special class ofparacrines. Explain your answer.arrow_forwardA neuron receiving a large enough signal, a resting potential changes and produces electrical impulse called ___________.arrow_forward
- The membrane potential caused by differences in ions across the plasma membrane of an electrically excitable cell (when not stimulated) is called: action potential resting membrane potential graded potential local potentialarrow_forwardThe compound tetraethylammonium (TEA) blocks the voltage-gated changes in potassium permeability that occurs during an action potential. After administration of TEA, what changes would you expect in the action potential?arrow_forwardWhy is the action potential conducted in only one direction in a neuron? Comments : Best of your knowledege for grasp the concept wellarrow_forward
- When action potentials arrive at a synapse between a neuron and another cell, they stimulate the release of molecules of a ________ that diffuse over to that cell.arrow_forwardHow much of a change in the membrane potential is necessary for the summation of postsynaptic potentials to result in an action potential being generated? +30 mV +15 mV +10 mV -15 mVarrow_forwardVoltage-gated Na+ channels open upon leaching what state? resting potential threshold repolaiization overshootarrow_forward
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