Anatomy & Physiology: The Unity of Form and Function
8th Edition
ISBN: 9781259277726
Author: Kenneth S. Saladin Dr.
Publisher: McGraw-Hill Education
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Chapter 13, Problem 10TYR
Summary Introduction
Introduction:
The spinal cord is a collection of nerve tissues that arise from the brain stem. It is a site which contains many motor neurons, interneurons and complex neural circuits. It is often known as ‘nuts and bolts’ of the nervous system. It controls and enables the forces on muscles and its adaptive movements.
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All 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 CNS
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.
In a single reflex arc involved in the knee-jerk reflex, how many synapses are activated within the spinal cord? a.Thousands b.Hundreds c.Dozens d.Two e.One
Chapter 13 Solutions
Anatomy & Physiology: The Unity of Form and Function
Ch. 13.1 - Prob. 1AYLOCh. 13.1 - Prob. 2AYLOCh. 13.1 - Prob. 3AYLOCh. 13.1 - Prob. 4AYLOCh. 13.1 - Prob. 5AYLOCh. 13.1 - Prob. 6AYLOCh. 13.1 - Prob. 7AYLOCh. 13.1 - Prob. 8AYLOCh. 13.1 - The position of the posterior and anterior horns...Ch. 13.1 - Prob. 10AYLO
Ch. 13.1 - Prob. 11AYLOCh. 13.1 - Prob. 12AYLOCh. 13.1 - Names and functions of the descending tractsCh. 13.1 - Prob. 14AYLOCh. 13.1 - Prob. 15AYLOCh. 13.1 - Prob. 16AYLOCh. 13.1 - Prob. 1BYGOCh. 13.1 - Prob. 2BYGOCh. 13.1 - Prob. 3BYGOCh. 13.1 - Prob. 4BYGOCh. 13.1 - Prob. 5BYGOCh. 13.2 - Prob. 1AYLOCh. 13.2 - Prob. 2AYLOCh. 13.2 - Prob. 3AYLOCh. 13.2 - Prob. 4AYLOCh. 13.2 - Prob. 5AYLOCh. 13.2 - Prob. 6AYLOCh. 13.2 - Prob. 7AYLOCh. 13.2 - Prob. 8AYLOCh. 13.2 - Prob. 9AYLOCh. 13.2 - Prob. 10AYLOCh. 13.2 - Prob. 11AYLOCh. 13.2 - Prob. 12AYLOCh. 13.2 - Prob. 6BYGOCh. 13.2 - Prob. 7BYGOCh. 13.2 - Prob. 8BYGOCh. 13.2 - Prob. 9BYGOCh. 13.3 - Prob. 1AYLOCh. 13.3 - The pathway and constituents of a somatic reflex...Ch. 13.3 - Prob. 3AYLOCh. 13.3 - Structure and function of muscle spindlesCh. 13.3 - Stretch reflexes; one or more examples; the...Ch. 13.3 - Prob. 6AYLOCh. 13.3 - Prob. 7AYLOCh. 13.3 - Prob. 8AYLOCh. 13.3 - Prob. 9AYLOCh. 13.3 - Name five structural components of a typical...Ch. 13.3 - State the function of each of the following in a...Ch. 13.3 - Prob. 12BYGOCh. 13.3 - Prob. 13BYGOCh. 13.3 - Prob. 14BYGOCh. 13 - arachno-Ch. 13 - Prob. 2BYMVCh. 13 - Prob. 3BYMVCh. 13 - Prob. 4BYMVCh. 13 - Prob. 5BYMVCh. 13 - Prob. 6BYMVCh. 13 - Prob. 7BYMVCh. 13 - Prob. 8BYMVCh. 13 - Prob. 9BYMVCh. 13 - tecto-Ch. 13 - Below L2. the vertebral canal is occupied by a...Ch. 13 - Prob. 2TYRCh. 13 - Nerve fibers that adjust the tension in a muscle...Ch. 13 - A stretch reflex requires the action of _______ to...Ch. 13 - Prob. 5TYRCh. 13 - Prob. 6TYRCh. 13 - Prob. 7TYRCh. 13 - Prob. 8TYRCh. 13 - Prob. 9TYRCh. 13 - Prob. 10TYRCh. 13 - Prob. 11TYRCh. 13 - Prob. 12TYRCh. 13 - The cerebellum receives feedback from the muscles...Ch. 13 - In the ______ reflex, contraction of flexor...Ch. 13 - Prob. 15TYRCh. 13 - Prob. 16TYRCh. 13 - Prob. 17TYRCh. 13 - Prob. 18TYRCh. 13 - Prob. 19TYRCh. 13 - Prob. 20TYRCh. 13 - Prob. 1WWTSCh. 13 - Prob. 2WWTSCh. 13 - Prob. 3WWTSCh. 13 - Some spinal nerves are sensory and others are...Ch. 13 - Prob. 5WWTSCh. 13 - The anterior and posterior horns of the spinal...Ch. 13 - Prob. 7WWTSCh. 13 - Prob. 8WWTSCh. 13 - Prob. 9WWTSCh. 13 - Prob. 10WWTSCh. 13 - Jillian is thrown from a horse. She strikes the...Ch. 13 - Wallace is the victim of a hunting accident. A...Ch. 13 - Anthony gets into a fight between rival gangs As...Ch. 13 - Stand with your right shoulder, hip, and foot...Ch. 13 - When a patient needs a tendon graft, surgeons...
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- The superior colliculi are twin bodies within the corpora quadrigemina of the midbrain that are involved in a. visual reflexes. b. auditory reflexes. c. relaying of cutaneous information. d. release of pituitary hormones.arrow_forwardHyporeflexia occurs when normal reflexes are weak but not absent. Damage to which of the following would result in hyporeflexia? Hyporeflexia occurs when normal reflexes are weak but not absent. Damage to which of the following would result in hyporeflexia? A.Motor neuron B. Sensory neuron C.Skeletal muscle D. Any of the choices would result in hyporeflexia. Which option to select..arrow_forwardThe autonomic nervous system is also called a. voluntary. b. involuntary. c. neuralgic. d. carpal.arrow_forward
- The most important autonomic control center in the CNS is:- a. the cerebral cortex. b. the limbic system. c. the midbrain. d. the hypothalamus. e. the sympathetic chain gangliaarrow_forwardAll of the following statements are accurate about the choroid plexus except a. it is located within the ventricles of the brain. b. it is composed of ependymal cells and blood capillaries. c. it receives and filters all sensory information. d. it produces and circulates cerebrospinal fluid.arrow_forwardMark the following statements on the role of the brain in movement as true or false. If a statement is false, correct it to make a true statement. a. The dopaminergic neurons of the substantia nigra enhance the actions of the caudate nucleus and putamen. b. The cerebellum monitors the initiation of movement but does not monitor ongoing movements. c. The basal nuclei inhibit inappropriate movements and are required for the initiation of movement. d. The correction of motor error by the cerebellum can occur over the long term by motor learningarrow_forward
- Which of the following is most correct: A. Most spinal nerves contain both somatic and autonomic fibers. B. Most body responses to changing internal and external environments involve both enhanced skeletal muscle and visceral activity C. Somatic and autonomic branches are not truly individual entities, function is well integrated. D. Higher brain centers regulate both somatic and autonomic function. E. All these are correct.arrow_forwardIn the knee-jerk reflex, the afferent neurons Select one: a. innervate leg flexor muscles b. are sensory neurons c. innervate leg flexor and extensor muscles d. innervate leg extensor muscles e. are cranial nervesarrow_forwardUse logic to determine whether each of the following reflexes is a somatic reflex or an autonomic (visceral) reflex. Hint: think about what the effector is — is it a skeletal muscle, or is it a smooth / cardiac muscle or gland? -Patellar (knee-jerk) reflex -Pupillary light reflex (autonomic/somatic) -Effectors are skeletal muscles (autonomic/somatic) -Effectors are smooth muscles or glands (autonomic/somatic) -Regulation of blood pressure (autonomic/somatic) -Salivary reflex (autonomic/somatic)arrow_forward
- 1. The single long process that extends from a typical motor nerve cell is the a. axon. b. synapse. c. cell body d. dendrite. 2. The cerebral hemispheres communicate with each other by means of the a. cerebral cortex. b. corpora cardiaca. c. corpus callosum. d. corpus allata. 3. Which of the following statements concerning the peripheral nervous system is false? a. There are 31 pairs of spinal nerves. b. Some nerves are both sensory and motor. c. Spinal nerves lead to and from the spinal cord. d. Cranial nerves lead from the brain directly to the spinal cord. 4. Which of the following sequences is correct? a. sensory neurons->interneurons->motor neurons b. motor neurons->integrators->sensory neurons c. receptors->sensory neurons->motor neurons->interneurons d. sensory neurons->receptors->motor neurons 5. The left hemisphere of the brain is…arrow_forwardReflexes 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.arrow_forwardThe autonomic nervous system innervates:- all of these except a. cardiac muscle. b. skeletal muscle. c. smooth muscle. d. salivary glands. e. blood vesselsarrow_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