<LCPO> BIOLOGY
12th Edition
ISBN: 9781266216398
Author: Raven
Publisher: MCG CUSTOM
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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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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.
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.
Chapter 42 Solutions
<LCPO> 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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- Which 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_forwardThe gray communicating ramus containsa. visceral sensory fibers.b. parasympathetic motor fibers.c. sympathetic preganglionic fibers.d. sympathetic postganglionic fibers.e. somatic motor fibersarrow_forwardWhich 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_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_forwardAll of the following are true concerning reflex arcs EXCEPT A.they involve a few neurons and directly enter and immediately leave the spinal cord B.they are used to prevent harm C.they are subconscious and automatic D.they only use the PNS and not the CNSarrow_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
- Name the structure that the arrow is pointing at?A. Superior colliculiB. Medial geniculate nucleusC. Thalamus D. Hypothalamus E. Epithalamus/pineal bodyarrow_forwardLesions of the cerebellum may cause A. spinal shock. B. hyperreflexia. OC. ataxia. O D. tremor at rest. E. increased tone of the flexors of the arms.arrow_forwardSpastic paralysis may occur when there is damage to a.the lower motor neurons. b.the upper motor neurons. c.either the lower or the upper motor neurons. d.Spastic paralysis would not result from either of these types of damage.arrow_forward
- Match the following: Cranial nerve to its function. Answers may be use more than once. Hypoglossal nerve + Accessory nerve - Vestibulocochlear nerve Trochlear nerve ◆ Trigeminal nerve A. Facial sensation, mastication, corneal reflex B. Tongue movement C. Downward and lateral gaze of the eye D. Balance and hearing E. Head movementarrow_forwardDamage to the dorsal ramus of a spinal nerve results ina. loss of sensation. c. Both a and b are correct.b. loss of motor function.arrow_forwardWhat neural system is primarily activated when a book is dropped into your outstretched hands with your eyes open? a. Feedback processing controlled by lower motor neurons in the spinal cord. b. None of the answers. c. Modulation of onset responses controlled by the basal ganglia. d. Motor coordination controlled by the cerebellum. e. Feedforward processing controlled by upper motor neurons in the brainstem.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