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refers to the ability of neurons to produce action potentials that travel from axon hillock up synaptic knob. excitability secretion conductivity elasticity OOOO

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter4: Principles Of Neural And Hormonal Communication

Section: Chapter Questions

Problem 13RE

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refers to the ability of neurons to produce action potentials that travel from axon hillock up
synaptic knob.
excitability
secretion
conductivity
elasticity

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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.
A neuron responds to adequate stimulation with _______, a type of self-propagating signal.
Neurons contain ________, which can receive signals from other neurons. a. axons b. mitochondria c. dendrites d. Golgibodies
Stellate cells initially process sensory input to the cortex, whereas pyramidal cells send fibers from the cortex to terminate on efferent motor neurons. (True or false)
Action potentials occur when ______. a. potassium gates close b. a stimulus pushes membrane potential to threshold c. sodium-potassium pumps become active d. neurotransmitter is reabsorbed
Watch this video (http://openstaxcollege.org/l/neurotrans) to learn about the release of a neurotransmitter. The action potential reaches the end of the axon, called the axon terminal, and a chemical signal is released to tell the target cell to do something, either initiate a new action potential, or to suppress that activity. In a very short space, the electrical signal of the action potential is changed into the chemical signal of a neurotransmitter, and then back to electrical changes in the target cell membrane. What is the importance of voltage-gated calcium channels in the release of neurotransmitters?
For a neuron to fire an action potential, its membranemust reach ________.a. hyperpolarizationb. the threshold of excitationc. the refractory periodd. inhibitory postsynaptic potential
The changes in membrane potential when a neuron is transmitting information is called ..... threshold action potential chemical potential resting potential
When EPSP and IPSP occur simultaneously the postsynaptic membrane :-a- becomes depolarizedb- becomes hyperpolarizedc- initiates an action potentiald- shows potential changes that depend upon the summation of their effects
A neuron receiving a large enough signal, a resting potential changes and produces electrical impulse called ___________.
The threshold of excitation is the voltage level at which ________ an excitatory postsynaptic potential can be measured an action potential is triggered a decrease in the rate of action potentials occurs potassium channels close
When they are not being stimulated, neurons have an electrical charge across their membranes called the resting potential. This potential is______ charged inside. 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.