Human Anatomy
9th Edition
ISBN: 9780135168059
Author: Marieb, Elaine Nicpon, Brady, Patricia, Mallatt, Jon
Publisher: Pearson Education, Inc.,
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Textbook Question
Chapter 12, Problem 23RQ
Draw a reflex arc in place in the nervous system (recall Figure 12.11). Would the
reflex still function if the neurons in the sensory ganglia were destroyed?
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Chapter 12 Solutions
Human Anatomy
Ch. 12 - In which direction are afferent signals carried?...Ch. 12 - What subdivision of the nervous system regulates...Ch. 12 - What type of sensation is (a) pain from a pulled...Ch. 12 - Which type of neuron process receives stimuli?Ch. 12 - Describe how the electrical impulse from one...Ch. 12 - What is the structural type of most sensory...Ch. 12 - Which structural type of neuron is most abundant?...Ch. 12 - Which neuroglia make myelin in the CNS? In the...Ch. 12 - Which neuroglia are common in regions where...Ch. 12 - Do Schwann cells cover nonmyelinated axons in the...
Ch. 12 - Name the connective tissue wrapping that encloses...Ch. 12 - Where do synaspes occur in the CNS, in white...Ch. 12 - Why is white matter white?Ch. 12 - If there is no interneuron in a reflex arc, as in...Ch. 12 - If you touch a hot stove, you reflexively...Ch. 12 - What type of neuronal circuit contains multiple...Ch. 12 - Both peripheral nerves and the white matter of the...Ch. 12 - From your understanding of the functions of myelin...Ch. 12 - What type of neurons form from neuroblasts in the...Ch. 12 - How does the development of sensory neurons...Ch. 12 - Prob. 1RQCh. 12 - Match the names of the cells in column B with the...Ch. 12 - Prob. 3RQCh. 12 - Prob. 4RQCh. 12 - An example of an effector is (a) the eye, (b) a...Ch. 12 - Prob. 6RQCh. 12 - A ganglion is a collection of (a) neuron cell...Ch. 12 - A synapse between a terminal bouton and a neuron...Ch. 12 - Myelin is most like which of the following cell...Ch. 12 - Prob. 10RQCh. 12 - Afferent neurons of the PNS synapse in the CNS...Ch. 12 - Prob. 12RQCh. 12 - Prob. 13RQCh. 12 - Place the connective tissue coverings surrounding...Ch. 12 - Define proprioception.Ch. 12 - Prob. 16RQCh. 12 - Prob. 17RQCh. 12 - Distinguish gray matter from white matter of the...Ch. 12 - What is distinctive about the appearance of a cell...Ch. 12 - Describe the differences between neurons and...Ch. 12 - Distinguish a nerve from a nerve fiber and a...Ch. 12 - Prob. 22RQCh. 12 - Draw a reflex arc in place in the nervous system...Ch. 12 - Prob. 24RQCh. 12 - Why are the cell bodies of sensory neurons located...Ch. 12 - Prob. 26RQCh. 12 - Two anatomists were arguing about a sensory...Ch. 12 - An MRI scan and other diagnostic tests indicated...Ch. 12 - Prob. 3CRCAQCh. 12 - Rochelle developed multiple sclerosis when she was...Ch. 12 - Reflexes can be somatic (as in the knee-jerk...Ch. 12 - Prob. 6CRCAQ
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- Watch this video (http://openstaxcollege.org/l/motorpathway) to learn more about the descending motor pathway for the somatic nervous system. The autonomic connections are mentioned, which are covered in another chapter. From this brief video, only some of the descending motor pathway of the somatic nervous system is described. Which division of the pathway is described and which division is left out?arrow_forwardIf a person has a motor disorder and cannot move their aim voluntarily, but their muscles have tone, which motor neuron—upper or lower—is probably affected? Explain why.arrow_forwardExplain how the binding of heroin to presynaptic neurones raises the probability of action potentials in the postsynaptic neurone. asap typed onlyarrow_forward
- Which neuron (s) fired (released neurotransmitters) at the 3 points indicated by the arrows?arrow_forwardNeural pathway transmit impulses which terminate at what? a) motor cortex, b) somatosensory cortex, c) mechanoreceptors, d) thalamus, e) brainstem, f) skeletal muscle, g) cerebellum?arrow_forwardWhich type of synapse is better suited for vision and hearing, and why?A. Metabotropic synapses because they produce quick, brief effectsB. Metabotropic synapses because they produce longerlasting effectsC. Ionotropic synapses because they produce quick, brief effectsD. Ionotropic synapses because they produce longerlasting effectsarrow_forward
- Cell bodies of UMN that synapse on LMN lie in all of these areas EXCEPT a) Medulla b) Thalamus c) Pre-motor cortex Pons d) Primary motor cortexarrow_forwardIf the plasma membrane of an electrically excitable cellwere depolarized to threshold in the center of the axon orsarcolemma, would the action potential be propagated inonly one direction? Why or why not?arrow_forwardMultiple sclerosis is a disease in which the immune system attacks and destroys the myelin sheath surrounding nerve cells. What effect would you expect the loss of myelin to have onthe speed of nerve impulses?arrow_forward
- Since neurotransmittersare not consumed in thesynaptic process, what are themechanisms to reduce theirconcentrations in the synapticcleft after they have beenused?arrow_forwardA motor neuron in the spinal cord typically receives input from neurons that originate in several different regions of the brain. Is this an example of convergence or divergence?arrow_forwardDescribe the effect of the botulinum toxin, which inhibits the release of acetylcholine at the neuromuscular junction. Would the poison curare, which competes for acetylcholine receptors (by attaching to the acetylcholine receptors and preventing acetylcholine from binding) have a similar effect? Explainarrow_forward
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