8. Define the following terms:a. resting membrane potentialb. depolarizationc. thresholdd. action potentialLaboratory 12 | Nervous System: Overview 281

The nervous system is the network of nerves and neurons which are responsible for the transmission…

Answered: 8. Define the following terms: a.…

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter35: The Nervous System

Section: Chapter Questions

Problem 8RQ: For a neuron to fire an action potential, its membrane must reach. hyperpolarization the threshold...

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Similar questions

The major role of the Na+/K+ pump is to: a. cause a rapid firing of the action potential so the inside of themembrane becomes momentarily positive. b. decrease the resting membrane potential to zero. c. hyperpolarize the membrane above resting value. d. cause an action potential to enter a refractory period. e. maintain the resting membrane potential at a constantnegative value.
Which of the following does not contribute to propagation of action potentials? a. As the area outside the membrane becomes negative, itattracts ions from adjacent regions; as the inside of the membrane becomes positive, it attracts negative ions from nearby in the cytoplasm. These events depolarize nearby regions of the axon membrane. b. The refractory period allows the impulse to travel in only one direction. c. Each segment of the axon prevents the adjacent segments from firing. d. The magnitude of the action potential stays the same as it travels down the axon. e. Up to a limit, increasing the intensity of the stimulus increases the number of action potentials.
1. Which of the following is the rapid upstroke in the action potential? A. Phase 0 B. Phase 1 C. Phase 2 D. Phase 3
An action potential begins when ___ . a. a neuron reaches threshold potential b. voltage-gated potassium gates open c. voltage-gated .sodium gates dose d. sodium-potassium pumps stop operating
Which of the following means the ability to transmit electrical current from one cell to another? A. Conductivity B. Excitability C. Contractility D. Automaticity
For a neuron to fire an action potential, its membrane must reach. hyperpolarization the threshold of excitation the refractory period inhibitory postsynaptic potential
1. An action potential does occur in response to a _____ , which strong enough to depolarize the membrane to threshold.
1. Which of the following divisions of the nervous system is first to transmit sensory information from muscles and visceral organs? A. afferent division of the PNS B. efferent division of the PNS C. efferent division of the CNS D. afferent division of the CNS 2. These neuroglial cells cover CNS axons with myelin. A. satellite cells B.astrocytes C.oligodendrocytes D.Schwann cells
1. If you block calcium channels on an axon, which will not occur? A) exocytosis of neurotransmitter B) repolarization phase of the action potential C) depolarization phase of the action potential D) hyperpolarization phase of the action potential E) graded potential
1: Describe the changes in the neuron membrane that occur throughout the course of an action potential. 2: Mention: Resting state, threshold, depolarization, repolarization, and hyperpolarization. 3: mention how the action potential is related to neuron communication.
1. The graph above represent time in milliseconds. At what time (in milliseconds) is the inside of the neuron the most positive and why? 2. Explain why the membrane potential changes at X 3. Explain what is happening at point C to the sodium and potassium ions and how this is affecting the membrane potential 4. Describe two things that contribute to the resting membrane potential
8. When a nerve impulse reaches the nerve endings the permeability of the A. Presynaptic membrane to potassium increases B. Presynaptic membrane to sodium decreases C. Presynaptic membrane to calcium increases D. Presynaptic Membranes of calcium decreases

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8. Define the following terms: a. resting membrane potential b. depolarization c. threshold d. action potential Laboratory 12 | Nervous System: Overview 281