What is Life? A Guide to Biology
3rd Edition
ISBN: 9781464135958
Author: Jay Phelan
Publisher: W.H. Freeman & Co
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Chapter 23, Problem 7MC
Summary Introduction
Introduction:
Myelin is an insulating sheath present along the outer surface of the axon of a neuron. It is necessary for neural signals to be transmitted efficiently.
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51) the somatic and autonomic nervous system differ in all of the following except......?
a) target organ responses to their neurotransmitter
b) their effectors
c) regulation of activity by higher brain centers
d) their efferent pathways and ganglia
Which of the following is not part of the peripheral nervous system?
a) The cranial nerves
b) The spinal nerves
c) Ganglier
d) The spinal cord
3) which of the following is not a part of the peripheral nervous system, exclusively?
a) sensory receptors
b) cranial nerves
c) spinal nerves
d) cerebellum
Chapter 23 Solutions
What is Life? A Guide to Biology
Ch. 23 - Prob. 1SACh. 23 - Prob. 2SACh. 23 - Prob. 3SACh. 23 - Prob. 4SACh. 23 - Prob. 5SACh. 23 - Prob. 6SACh. 23 - Prob. 7SACh. 23 - Prob. 8SACh. 23 - Prob. 9SACh. 23 - Prob. 10SA
Ch. 23 - Prob. 11SACh. 23 - Prob. 12SACh. 23 - Prob. 13SACh. 23 - Prob. 14SACh. 23 - Prob. 15SACh. 23 - Prob. 16SACh. 23 - Prob. 17SACh. 23 - Prob. 18SACh. 23 - Prob. 19SACh. 23 - Prob. 20SACh. 23 - Prob. 1MCCh. 23 - Prob. 2MCCh. 23 - Prob. 3MCCh. 23 - Prob. 4MCCh. 23 - Prob. 5MCCh. 23 - Prob. 6MCCh. 23 - Prob. 7MCCh. 23 - Prob. 8MCCh. 23 - Prob. 9MCCh. 23 - Prob. 10MCCh. 23 - Prob. 11MCCh. 23 - Prob. 12MCCh. 23 - Prob. 13MCCh. 23 - Prob. 14MCCh. 23 - Prob. 15MCCh. 23 - Prob. 16MC
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- Which of the following is true regarding the difference between graded and action potentials? a.) Action potential occur only when the surface of the neuron is myelinated, but graded potentials occur in both in both myelinated and non-myelinated neurons. b.) The magnitude of action potential depends on the magnitude of the stimulus, whereas graded potentials are all or none. c.) The magnitude of graded potential depends on the magnitude of the stimulus, whereas action potentials are all or none.arrow_forwardThe process of myelination results in an increase in white matter. Myelination happens for all brain regions. Because of increases in myelination A) At the same time; neural signals can travel through the brain faster B) At different times; neural signals can travel through the brain faster C) At different times; neurogenesis is improved D) At the same time; neurogenesis is improvedarrow_forwardA) The neuron labelled "D" in the figure is what class of functional neuron?: 3rd-order? lower motor neurone? upper motor neurone? 2nd-order? bipolar? unipolar? B) The message in the pleural pathway in figure 3 comes from the: occipital lobe? skeletal muscle? somatosensoty cortex? temporal lobe? receptors? parietal lobe? frontal lobe? C) Damage to this structure in the figure would affect the ability to move your RIGHT leg: A, B, C, D, E, F, Garrow_forward
- Which of the following is depicted in the diagram? A) Somatic nervous system B) spinal reflex arc C) sympathetic nervous system D) parasympathetic nervous systemarrow_forwardA simple nervous system A) must include chemical senses and vision. B) includes sensory information but no effectors. C) has information flow in only one direction: toward an integrating center. D) has information flow in only one direction: away from an integrating center. E) includes sensory information, an integrating center, and effectors.arrow_forwarda) Which letter represents structure that is a receptor for sensory info? b) Which letter represents a skeletal muscle? c) Which letter represents structure that transmits info to CNS d) Which letter represents structure that is known as cell body of a sensory neurone? e) Which letter represents structure that is cell body of a post-ganglionic sympathetic neuron?arrow_forward
- 10) which of the following definitions does not match the neuron structure? a) cell body;integrating center of the neuron b) axon; structure which sends the impulse c) dendrite; structure which receives the impulse d) dendrite; structure which sends the impulsearrow_forwardInvoluntary motor control of things like balance and muscle tone is regulated by which of the following? A) midbrain B) frontal lobe C) temporal lobe D) hypothalamusarrow_forwardThe opening of potassium (K+) channels on dendrites of a postsynaptic neuron will have what effect? A) Depolarization B) EPSP C) Hyperpolarization D) IPSP E) Both A and B are correct F) Both C and D are correctarrow_forward
- 20) which of the following is not a part of the central nervous system, exclusively? a) cerebellum b) medulla oblongata c) cranial nerves d) spinal cordarrow_forwardSaltatory conduction is a term applied to the "jumping" movement of action potentials Multiple Choice a) along the postsynaptic membrane from dendrite to axon hillock. b) along myelinated axons. c) from one neuron to another. d) in two directions at the same time. e) across electrical synapses.arrow_forward15) The concentration of ions in the chemical environment surrounding the neurons must be tightly regulated for neurons to function properly. Which of the following cells is most responsible for this? a) astrocytes b) Schwann cells c) oligodendrocytes d) satellite cellsarrow_forward
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