Pearson eText Biology: Science for Life with Physiology -- Instant Access (Pearson+)
6th Edition
ISBN: 9780135214114
Author: Colleen Belk, Virginia Maier
Publisher: PEARSON+
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Chapter 24, Problem 7LTB
Summary Introduction
Introduction:
The nerve impulse is also known as an action potential. An action potential can be defined as the changes in the electrical potential of the neuron due to the movement of the ions. It is propagated like an
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The change in the electrical balance between the intra- and extra-cellular fluid that occurs when a neuron sends a message is called the _________________ potential.
action
resting
electrical
synaptic
At __________ synapses, neurotransmitters hyperpolarize the membrane, by making it more permeable to K+ or moving membrane potential away from threshold (hyperpolarizing), and making generation of an action potential less likely; these are inhibitory postsynaptic potentials (EPSPs).
A/An _____ synapse is formed when a presynaptic neuron synapses with the cell body of a postsynaptic neuron
Chapter 24 Solutions
Pearson eText Biology: Science for Life with Physiology -- Instant Access (Pearson+)
Ch. 24 - Prob. 1LTBCh. 24 - How do sensory, motor, and interneurons differ?Ch. 24 - What are the general senses?Ch. 24 - Which brain structure controls language, memory,...Ch. 24 - Prob. 5LTBCh. 24 - Prob. 6LTBCh. 24 - Prob. 7LTBCh. 24 - Neurotransmitters. ___________. are electrical...Ch. 24 - The effects of a neurotransmitter could be...Ch. 24 - Prob. 10LTB
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- Substances that mediate and amplifies signals inside the cell called __________ (H) __________arrow_forwardA neuron receiving a large enough signal, a resting potential changes and produces electrical impulse called ___________.arrow_forwardAfter an action potential, the opening of voltage-gated ________ channels and the inactivation of sodium channels, cause the membrane to return to its resting membrane potential. disodium potassium calcium chloride acetylcholinearrow_forward
- ___________ are called “downers” because they depressthe central nervous system.arrow_forwardTrue or False: Calcium pumps in the axon terminal exchange molecules of calcium with molecules of potassium from the extracellular fluidarrow_forwardA neuron responds to adequate stimulation with _______, a type of self-propagating signal.arrow_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_forwardNerve transmission and communication with other neurons. DI it restores the membrane potential the chemical that talks between one neuron and the other neuron the point between the neuron and the muscle transmits impulse to dendrite it carries receptors on its surface it produces the neurotransmitter 1. Neurotransmitter 2. Presynaptic membrane 3. Postsynaptic membrane 4. Nat-K+ pump 5. Neuromuscular junction 6. Axonarrow_forwardWhile the inactivation gate is closed and the activation gate is open, sodium channels are_____.arrow_forward
- Blocking KCa2 (SK) channels will typically ________ a neuron's firing rate Increase Decrease Not changearrow_forwardTrue or False: All input to a neuron occurs via synapses on the neuron's dendritesarrow_forwardCorrect answer: Ligand-gated ion channel don’t open until the neurotransmitter diffuses across the synapse and binds to the receptor, The calcium channels are blocked in the presynaptic cells, It takes time for the vesicular exocytosis to occur Please explain why each of the correct answer choices are correct. Thank you.arrow_forward
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