BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 42, Problem 7U
Summary Introduction
Introduction:
A reflex is a sudden response which occurs in the muscles by involuntary functions. It causes the production of rapid motor response towards a stimulus. Cerebral cortex contains higher cognitive functions and causes the integration and interpretation of the sensory information. The thalamus is a relay station which contains autonomic functions.
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Students have asked these similar questions
Reflexes involve the:
Select one:
a. sympathetic and central nervous systems.
b. autonomic nervous system and the brain.
c. parasympathetic nervous system and the
cerebrum.
d. peripheral nervous system and the spinal
cord.
All of the following are true regarding the descending motor tracts EXCEPT
which one?
A. They originate in either the cerebral cortex or brainstem.
B. The pathways are generally made of a two-neuron system.
C. The upper motor neuron fibers target lower motor neurons of the spinal cord or
cranial nerves.
D. They are involved in assisting with voluntary movement.
Tertiary neurons in both the spinothalamic tract and the dorsal-column/medial-lemniscal systema. project to the somatosensory cortex.b. cross to the opposite side in the medulla oblongata.c. are found in the spinal cord.d. connect to quaternary neurons in the thalamus.e. are part of a descending pathway
Chapter 42 Solutions
BIOLOGY
Ch. 42.1 - Differentiate between subdivisions of the...Ch. 42.1 - Prob. 2LOCh. 42.1 - Explain the roles of the different nervous system...Ch. 42.2 - Contrast the relative concentrations of important...Ch. 42.2 - Prob. 2LOCh. 42.2 - Prob. 3LOCh. 42.3 - Prob. 1LOCh. 42.3 - Prob. 2LOCh. 42.3 - Prob. 3LOCh. 42.4 - Prob. 1LO
Ch. 42.4 - Prob. 2LOCh. 42.4 - Prob. 3LOCh. 42.5 - Describe the organization of the peripheral...Ch. 42.5 - Prob. 2LOCh. 42.5 - Prob. 3LOCh. 42.5 - Prob. 4LOCh. 42 - Data analysis Draw the resulting potentials for...Ch. 42 - Prob. 2DACh. 42 - Which of the following best describes the...Ch. 42 - The ____ cannot be controlled by conscious...Ch. 42 - Prob. 3UCh. 42 - Inhibitory neurotransmitters a. hyperpolarize...Ch. 42 - White matter is ______, and gray matter is...Ch. 42 - During an action potential a. the rising phase is...Ch. 42 - Prob. 7UCh. 42 - Imagine that you are doing an experiment on the...Ch. 42 - The Na+/K+ ATPase pump is a. not required for...Ch. 42 - Prob. 3ACh. 42 - The following is a list of the components of a...Ch. 42 - Prob. 5ACh. 42 - As you sit quietly reading this sentence, the part...Ch. 42 - G proteincoupled receptors are involved in the...Ch. 42 - Tetraethylammonium (TEA) is a drug that blocks...Ch. 42 - Describe the status of the Na+ and K+ channels at...Ch. 42 - Describe the steps required to produce an...Ch. 42 - Prob. 4S
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- Fibers of the dorsal-column/medial-lemniscal systema. carry the sensations of two-point discrimination, proprioception,pressure, and vibration.b. cross to the opposite side in the medulla oblongata.c. are divided into the fasciculus gracilis and the fasciculus cuneatusin the spinal cord.d. include secondary neurons that exit the medulla and synapse in thethalamus.e. All of these are correct.arrow_forwardGiven these components of a reflex arc:(1) effector organ (4) sensory neuron(2) interneuron (5) sensory receptor(3) motor neuronChoose the correct order an action potential follows after a sensoryreceptor is stimulated.a. 5,4,3,2,1 c. 5,3,4,1,2 e. 5,3,2,1,4b. 5,4,2,3,1 d. 5,2,4,3,1arrow_forwardWhich of the following is correct? tertiary neurons found by:- a. extending between the posterior horn and anterior horn b. extending between the posterior horn and the brainstem c. extending between the thalamus and the primary somatosensory cortex d. extending between the primary motor cortex and brainstemarrow_forward
- Which of the following is NOT a reason why a reflex arc is faster than a normal nerve transmission? a. A reflex arc stimulates the motor neurons for an immediate reaction. b. A reflex arc does not send information to the brain to be processed. c. A reflex arc does not involve neurotransmitters. d. A reflex arc involves fewer neurons.arrow_forwardThe gray communicating ramus containsa. visceral sensory fibers.b. parasympathetic motor fibers.c. sympathetic preganglionic fibers.d. sympathetic postganglionic fibers.e. somatic motor fibersarrow_forwardState the function of autonomic nervous system. A. Transmits information from periphery to the central nervous system B. Voluntary nervous system that innervates skeletal muscles C. Involuntary nervous system that innervates smooth muscle and glands. D. Important for conscious responses Indicate the correct cerebral lobes and its control. A. Frontal lobe: speech and voluntary movement B. Parietal lobe: conscious perception of vision C. Temporal lobe: taste and reading D. Occipital lobe: smell and hearingarrow_forward
- 1. The ventral horn of the spinal cord is where -------------------- would be found. A. visceral sensory neurons B. visceral motor neurons C. somatic motor neurons D. somatic sensory neurons 2. This is the general order of events for a reflex arc. A. information relayed to the CNS, activation of a sensory receptor, activation of a motor neuron, response by the effector B. response by the effector, activation of a motor neuron, information relayed to the CNS, activation of a sensory receptor C. activation of a sensory receptor, information relayed to the CNS, response by the effector, activation of a motor neuron D. activation of a sensory receptor, information relayed to the CNS, activation of a motor neuron, response by the effectorarrow_forwarda. Describe the characteristics of a spinal cordtract, using an example.b. Differentiate an upper motor neuron from alower motor neuron by location and function.c. Describe a nerve plexus and how it affectsnerve distribution.d. Describe an acquired reflex and include anexample.arrow_forwardThe dorsal root ganglion A. contains the cell bodies of spinal motoneurons. B. is made up of unmyelinated axons. C. contains the cell bodies of Aß primary afferent fibers. O D. degenerates in Parkinson's disease. E. is in the medulla.arrow_forward
- Damage to the surface tissue of the spinal cord will most likely affecta. information processing within the spinal cord.b. the stimulation of sensory organs.c. communication between the peripheral nervous system and the brain.d. reflex arcs.arrow_forwardWhich of the following statements about cerebral white matter is false? a. Commissural fibers connect the right and left cerebral hemispheres. b. Projection fibers connect the cerebral cortex of one hemisphere with structures in the other hemisphere. c. The corpus callosum is the largest bundle of white matter in the brain. d. Association fibers connect the gyri of the cerebral cortex with one anotherarrow_forwardYou have a patient with a spinal cord transection at the C5 level. Answer the following questions about thatpatient. a. You ask the patient to close their eyes and use a reflex hammer to tap their patellar tendon. Will youobserve a stretch reflex and if so will it be normal? Explain your answer fully. b. Will the patient know when you tapped the patellar tendon if their eyes remain closed? Explain youranswer fully.arrow_forward
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The Sensorimotor System and Human Reflexes; Author: Professor Dave Explains;https://www.youtube.com/watch?v=M0PEXquyhA4;License: Standard youtube license