EBK BIOLOGY
6th Edition
ISBN: 8220106777640
Author: Maier
Publisher: PEARSON
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Chapter 24, Problem 10LTB
Summary Introduction
To determine:
If the given statement is true or false.
Introduction:
Reflexes are automatic responses to a stimulus. They are prewired in a circuit of neurons known as a reflex arc, often consisting of a sensory neuron receiving information from a sensory receptor, an interneuron passing on the information, and a motor neuron sending a message to the muscle that needs to respond.
A reflex arc can consist of a sensory receptor, a sensory neuron, an interneuron, a motor neuron, and an effector. Touching a hot baking sheet evokes the withdrawal reflex.
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True or false : A plexopathy is suspected if the symptoms are localised to a single nerve. Patients may complain of neuropathic pains, numbness or weakness and wasting of muscles?
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Chapter 24 Solutions
EBK BIOLOGY
Ch. 24 - Prob. 1LTBCh. 24 - How do sensory, motor, and interneurons differ?Ch. 24 - What are the general senses?Ch. 24 - Which brain structure controls language, memory,...Ch. 24 - Prob. 5LTBCh. 24 - Prob. 6LTBCh. 24 - Prob. 7LTBCh. 24 - Neurotransmitters. ___________. are electrical...Ch. 24 - The effects of a neurotransmitter could be...Ch. 24 - Prob. 10LTB
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- True/False: In a polysynaptic reflex, a sensory neuron synapses directly with a motor neuron.arrow_forwardAn ipsilateral reflex arc is one in whicharrow_forwardTrue/False: The autonomic nervous system is “involuntary” therefore the cerebral cortex has no control over this branch of the nervous system.arrow_forward
- Background: A doctor conducted a patellar tendon (aka knee jerk - covered in lecture, assigned reading, and laboratory) reflex test on a patient. To do so, she tested the patient's knee-jerk reflex by hitting the patient's patellar tendon with a rubber hammer.For this patient, the doctor observed that hitting the tendon caused no knee jerk reflex at all, even after many attempts.Normally, a patient will kick her lower leg after the hammer hit on the tendon.However, the doctor could stimulate contraction of the quadriceps leg muscles using a stimulating electrode that applied a voltage across the muscle. The doctor, with further analysis, determined that the receptor membranes of the stretch receptors were operating correctly.To do this, she carefully inserted an electrode into a stretch receptor's membrane, near to the location on the membrane where receptor proteins are located. She measured a change in voltage while hitting the tendon with the hammer. With further testing, the…arrow_forwardBackground: A doctor conducted a patellar tendon (aka knee jerk - covered in lecture, assigned reading, and laboratory) reflex test on a patient. To do so, she tested the patient's knee-jerk reflex by hitting the patient's patellar tendon with a rubber hammer. For this patient, the doctor observed that hitting the tendon caused no knee jerk reflex at all, even after many attempts. Normally, a patient will kick her lower leg after the hammer hit on the tendon. However, the doctor could stimulate contraction of the quadriceps leg muscles using a stimulating electrode that applied a voltage across the muscle. 1) During the examination, the patient got nervous. His heart rate increased. Which of the following would increase heart rate? Group of answer choices a)An increase in parasympathetic neural stimulation to the pacemaker node of the heart b)An increase in sympathetic neural stimulation to the pacemaker node of the heart c)An increase in acetylcholine release by motor neurons…arrow_forwardTrue or False: The cerebellum is more likely to be activated during automatic movements like walking, rather than learned movements like your golf swing.arrow_forward
- True or False: Nerves are classified as cranial or spinal depending on whether they arise from the brain or the spinal cord.arrow_forwardThe withdrawal reflex is a monosynaptic reflex arc.True ORFalsearrow_forwardConnie accidentally touched the hot kettle. Explain what happens using your knowledge of withdrawal reflex.arrow_forward
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