LAB MANUAL:MCKINLEY'S ANATOMY & PHYSIOL
2nd Edition
ISBN: 9781260484991
Author: McKinley
Publisher: MCG
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Chapter 12, Problem 3CSL
Summary Introduction
To determine:
The certain type of channel which is impaired by neurotoxins.
Concept introduction:
The neurotoxin is a type of toxin which affects the nervous tissues. Neurotoxin belongs to the class of exogenous chemical that adversely affects the functioning and structure of the nervous system. It will affect the functioning of both mature and developing nervous system. This neurotoxin prevents the depolarization stage of an action potential.
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A neurotoxin was delivered to a patient that prevented sodium channels from opening at the axon level. How does this affect a neuron's ability to communicate to other neurons? Explain in terms of action potential conductance, and neurotransmitter exocytosis at the axon terminal.
Name a neurotransmitter stored at the terminal end of the axon.
The initial rise in the membrane potential of an axon upon stimulation is called the........... phase of the ...............
Chapter 12 Solutions
LAB MANUAL:MCKINLEY'S ANATOMY & PHYSIOL
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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- A change in the axon membrane potential from -70 mV to -64 mV would be called a depolarization polarization hyperpolarization potentialarrow_forwardfill in the blank ...............is the most common neurotransmitter in the peripheral nervous systemarrow_forwardName the major parts of an axon.arrow_forward
- What is known as axon terminal ?arrow_forwardwhat happens to the conduction velocity of an axon that is isometrically twice as big as another axon ?arrow_forwardHow do proteins and other chemicals synthesized in the soma get to the axon terminals? By what process can a virus that invades a peripheral nerve fiber get to the soma of that neuron?arrow_forward
- Axons have diameters of _________ and do not _______. 0.4µm to 1mm, contain microtubules 100-100 µm, contain sodium channels 100-100 µm, contain calcium channels 0.4µm to 1mm, taperarrow_forwardA damaged axon in the PNS may be able to regenerate only if the cell body is intact. why do you think that the cell body must be intact for regeneration to occur?arrow_forwardUnmyelinated axons conduct action potentials without decrement, but when myelinated axons lose myelin in demyelinating diseases such as multiple sclerosis, conduction of action potentials is blocked. Why?arrow_forward
- Why are impulses transmitted more quickly down a myelinated axon than down an unmyelinated axon?arrow_forwardMany neurons have only a single axon, but many terminals at the end of the axon. How does this end structure of the axon support its function?arrow_forwardAn action potential is generated at the... trigger zone of the axon postsynaptic membrane cell body axon terminalarrow_forward
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