Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 39, Problem 16TYK
Summary Introduction
To review:
The propagation of action potential through nerve is evolved only once, according to a biologist. Find evidence that either supports or refutes that hypothesis.
Introduction:
The nerve impulse or action potential is generated in the neurons. An action potential is nothing but an electrical impulse. This electrical impulse generates due to the presence of voltage-gated ion channels on the plasma membrane of the neurons and presence of different concentrations of ions (sodium, potassium, calcium) in both sides of the neurons.
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Question 5 options:
Muscle contractions are prevented, causing paralysis.
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a) transmits nerve impulses to the brain.
b) is very short.
c) transmits nerve impulses out of the brain and spinal cord.
d) transmits nerve impulses to muscles only.
Use the illustration below to answer questions 7 and 8.
7. Which number represents a dendrite?
a) 1
b)2
c)3
d)4
e)5
8. What number represents the myelin sheath?
a)1
b)2
c)3
d)4
e)5
9. At rest, a neuron is:
a) Polarized
b) Depolarized
c) Green
10. Certain phenomena can be observed in a person running. What causes the runner's breathing rate to increase.
a) The cells produce more CO2.
b) The cells make more urea.
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Chapter 39 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 39.1 - Prob. 1SBCh. 39.1 - Prob. 2SBCh. 39.1 - Prob. 3SBCh. 39.2 - Prob. 1SBCh. 39.2 - Prob. 2SBCh. 39.3 - Prob. 1SBCh. 39.3 - Prob. 2SBCh. 39.4 - Prob. 1SBCh. 39 - Prob. 1TYKCh. 39 - Prob. 2TYK
Ch. 39 - An example of a synapse could be the site where:...Ch. 39 - Prob. 4TYKCh. 39 - The major role of the Na+/K+ pump is to: a. cause...Ch. 39 - In the propagation of a nerve impulse: a. the...Ch. 39 - Which of the following does not contribute to...Ch. 39 - Which of the following statements best describes...Ch. 39 - Prob. 9TYKCh. 39 - Prob. 10TYKCh. 39 - Prob. 11TYKCh. 39 - Prob. 12TYKCh. 39 - Prob. 13TYKCh. 39 - Prob. 14TYKCh. 39 - Prob. 15TYKCh. 39 - Prob. 16TYKCh. 39 - You learned in this chapter that Na+/K+ active...Ch. 39 - Prob. 2ITDCh. 39 - Prob. 3ITD
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Neuroscience Question: Which of the following statements ACCURATELY describe spinal cord organization.
α-motor neurons are organized from lateral to media such that those found towards the medial section of the spinal cord controls the distal muscles.
Lumbar spinal cord enlargement is observed where neurons that innervate the legs and feet are located
Neuronal cell bodies (somas) of neurons that innervate single muscles are only found in a single spinal cord segment.
Muscles of the trunk are represented medially while muscles of arms and hands are represented laterally
Group of answer choices
1, 2, 4
2, 3, 4
2, 4
4 only
1,2,3,4
Here is my reasoning: Please you be the judge if this is correct!
α-motor neurons are organized from lateral to medial such that those found towards the medial section of the spinal cord control the distal muscles.
This is inaccurate. α-motor neurons are organized from medial to lateral in the spinal cord, with those medially controlling axial…
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Most human axons have a myelin sheath that_____ . a. prevents action potentials from moving backward b. increases the speed of action potential conduction c. consists of specialized interneurons d. increases the size of action potentials
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Think back on an emergency situation you once experienced. Which division of the nervous system was triggered during that scenario? How were your body responses affected by this nervous system?
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Experimenters injected bark scorpion venom into mouse neurons and measured how many action potentials were generated after the venom was introduced.
Is it possible that the venom could be affecting the activity of a voltage-gated potassium channel?
What effect could the venom have on a voltage-gated potassium channel to produce this result?
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Draw a neuron then use the different documents of the activity to determine on the figure the location of each part of the neuron in the nervous system
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Consider the image.
The neuron labeled number _____ in the figure is a motor neuron; its function is _____.
A)2; stimulating muscles or glands
B)3; stimulating muscles or glands
C)1; connecting different types of neurons
D)3; connecting different types of neurons
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Construct a unit concept map to show the relationships among the following set of terms:
action potential, arbor vitae, brainstem, diencephalon, epineurium, gray matter, lateral horn, nerve fiber, node of Ranvier, synaptic cleft
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explain how nervous systems it evolved in humans in comparison to one lower organism
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At rest, a neuron has a lower concentration of sodium than the surrounding fluid. When a neuron sends a signal, it opens sodium channels. What happens to the sodium when the sodium channels open?
A.
The sodium diffuses out of the cell.
B.
The sodium is pumped into the cell.
C.
The sodium is pumped out of the cell.
D.
The sodium diffuses into the cell.
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What membrane protein of the neuron is responsible for briefly increasing the Na+ permeability of the membrane during the rising phase of the nerve impulse?
a. the sodium-potassium pump
b. the voltage gated potassium channel
c. the voltage gated sodium channel
d. the stimulus gated sodium channel
e. the ligand gated ion channel
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Galen performed vivisection, or live experimentation, on animals to learn about the nervous system. What did Galen discover with his squealing pig experiment?
A) Galen correctly identified that peripheral nerves could control bodily function
B) Galen correctly identified the division between the central and peripheral nervous systems
C) Galen demonstrated that tendons, ligaments and nerves were separate entities
D) Galen demonstated that transection of individual nerves had little functional consequence.
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What did Galvani's first round of frog experiments demonstrate?
A. Nervous tissue is reactive in the presence of no metal
B. Natural electrical properties existed within the nerve that allow for muscle contraction
C. Muscle contraction is dependent on the distance between the nerve and 2 metals
D. Only man-made elecricity could activate a nerve
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