BIOL:CONCEPT+INVEST.ETEXT
5th Edition
ISBN: 9781264154173
Author: Hoefnagels
Publisher: MCG
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Chapter 26, Problem 2PIT
Summary Introduction
To add:
The term axons and myelin to the concept map.
Concept introduction:
The neuron is a basic functional unit of nervous system and is the specialized cells of nervous system that makes a complex network for the transmission of messages. It is rapid and efficient network of nervous system. A neuron involves a cell body, nerve fibers: dendrites and an axon in its structure.
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Chapter 26 Solutions
BIOL:CONCEPT+INVEST.ETEXT
Ch. 26.1 - Prob. 1MCCh. 26.1 - Prob. 2MCCh. 26.1 - Prob. 3MCCh. 26.2 - Prob. 1MCCh. 26.2 - Where is the myelin sheath located?Ch. 26.2 - Prob. 3MCCh. 26.2 - What are the functions of each of the three...Ch. 26.3 - Describe the forces that maintain the distribution...Ch. 26.3 - Prob. 2MCCh. 26.3 - Prob. 3MC
Ch. 26.3 - Prob. 4MCCh. 26.3 - What prevents action potentials from spreading in...Ch. 26.3 - Prob. 6MCCh. 26.3 - How do myelin and the nodes of Ranvier speed...Ch. 26.4 - Describe the structure of a synapse.Ch. 26.4 - Prob. 2MCCh. 26.4 - Prob. 3MCCh. 26.4 - Prob. 4MCCh. 26.5 - Prob. 1MCCh. 26.5 - Prob. 2MCCh. 26.5 - Prob. 3MCCh. 26.5 - Prob. 4MCCh. 26.6 - Prob. 1MCCh. 26.6 - Prob. 2MCCh. 26.6 - Prob. 3MCCh. 26.6 - List some structures that protect the central...Ch. 26.6 - Prob. 5MCCh. 26.7 - The researchers conducted a behavioral experiment...Ch. 26.7 - Prob. 2MCCh. 26 - Some cells of the central nervous system are...Ch. 26 - Prob. 2MCQCh. 26 - What event triggers an action potential? a....Ch. 26 - Prob. 4MCQCh. 26 - Prob. 5MCQCh. 26 - Prob. 6MCQCh. 26 - Prob. 7MCQCh. 26 - Damage to the surface tissue of the spinal cord...Ch. 26 - Prob. 9MCQCh. 26 - Describe some invertebrate nervous systems. Why do...Ch. 26 - Prob. 2WIOCh. 26 - Prob. 3WIOCh. 26 - Prob. 4WIOCh. 26 - What is the connection between the threshold...Ch. 26 - Write a nonbiological analogy for resting...Ch. 26 - Prob. 7WIOCh. 26 - Sketch a synapse: label the axon and synaptic...Ch. 26 - Describe the events that occur at a synapse when a...Ch. 26 - Prob. 10WIOCh. 26 - Prob. 11WIOCh. 26 - Cerebral palsy is a nervous system disorder that...Ch. 26 - Traumatic brain injury can occur when a person...Ch. 26 - Prob. 14WIOCh. 26 - Prob. 15WIOCh. 26 - Prob. 16WIOCh. 26 - Prob. 1PITCh. 26 - Prob. 2PITCh. 26 - PULL IT TOGETHER 4. Acid the somatic, autonomic,...
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- The part of a neuron that contains the nucleus is the cell body dendrite axon glialarrow_forwardWhich of the following does not contribute to propagation of action potentials? a. As the area outside the membrane becomes negative, itattracts ions from adjacent regions; as the inside of the membrane becomes positive, it attracts negative ions from nearby in the cytoplasm. These events depolarize nearby regions of the axon membrane. b. The refractory period allows the impulse to travel in only one direction. c. Each segment of the axon prevents the adjacent segments from firing. d. The magnitude of the action potential stays the same as it travels down the axon. e. Up to a limit, increasing the intensity of the stimulus increases the number of action potentials.arrow_forward10. Other types of cells, called glia, greatly outnumber neurons in the CNS. These cells are shown below. For each, label the glial cell type and give one or more functions that each serves. a) Cell Type: (b) Cell Type: Function: Function: (b) (a) (d) Cell Type: c) Cell Type: Function: Function: (d) Dopymghe 200s Pon Ed Inc pubhing Benjamin Cumming 11. A simple reflex arc is a wired circuit delivering information to and from the central nervous system. Use the diagram to label the structures. Then briefly describe the type of signal that must pass along one cell, cross, and then affect the next cell in the chain. Use the words of neuroanatomy. The signal:arrow_forward
- Which of the following is probably going to propagate an action potential fastest? a thin, unmyelinated axon a thin, myelinated axon a thick, unmyelinated axon a thick, myelinated axonarrow_forwardWhich of the following could not elicit a signal transduction response? a. a protein kinase b. a virus mimicking a normal signal molecule c. a peptide hormone d. a steroid hormone e. a neurotransmitterarrow_forward5. Give a simple illustration of a synapse and its components. Trace and discuss the pathway of information towards and out of a synapse.arrow_forward
- 8. What is the single most important piece of information in determining the response of a post- synaptic cell?arrow_forward4. Label the structures in the following diagram of a neuron.?arrow_forward15. Which of the following is true concerning the Synapse? a. The post-synaptic membrane possesses vesicles full of neurotransmitters. b. The pre-synaptic membrane possesses receptors responsible for binding to neurotransmitters. C. The neurotransmitters are packaged and stored in the pre-synaptic region of the synapse. d. The synaptic cleft is full of the somas of all of the sensory neurons within a desmosome.arrow_forward
- 19. Identify the two major types of channels that open and close during an action potential in a neuron (see images below). the voltage-gated Na* channel and the voltage-gated K*channel 20. What stimulates the two channels above to open?arrow_forward7. Assuming equivalent stimulation of the two pre-synaptic axons in the diagram below, in which of the two post-synaptic cells will you observe a stronger response? Why? = 5-HT = 5-HT receptor = 5-HTT (transporter)arrow_forward7. You stimulate a presynaptic cell and record from the postsynaptic neuron of each pair. For each mutation below, describe the following: i) After the first stimulus, how does the excitatory postsynaptic potential (EPSP) you record from the postsynaptic neuron differ from the EPSP recorded from a wild-type animal? Does it increase, decrease, stay comparatively the same, or fail to be generated at all? ii) After five stimulations of the presynaptic cell in quick succession, how does the EPSP you record from the mutant animal differ from that in the same experiment on a wild-type animal? Explain your reasoning in each case. The mutations are as follows: 7A. Mutation of the voltage-gated Ca2+ channels of the presynaptic terminal. The mutant channels have a lower opening threshold.arrow_forward
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