Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
4th Edition
ISBN: 9781259853197
Author: Robert Brooker
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 42, Problem 5TY
Summary Introduction
Introduction: Different organisms have different types of nervous system. For example, jellyfishes have a simple nerve net and humans contain a well-defined complex nervous system. The nervous system of humans is composed of CNS and PNS. CNS stands for “Central nervous system” and it is composed of brain and the spinal cord. However, PNS or “Peripheral nervous system” contains the neurons that connect brain and spinal cord to each other and to other parts of the body.
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The nervous system that consists of 12 pairs of cranial nerves and 31 pairs of spinal nerves is calleda. central.b. peripheral.c. sympathetic.d. parasympathetic.
A fight-or-flight response in the body is controlled by thea. sympathetic division of the nervous system.b. parasympathetic division of the nervous system.c. release of acetylcholine from postganglionic neurons.d. somatic nervous system.
Which of the following is not a part of the periphrial nervous system (PNS)?
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Chapter 42 Solutions
Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
Ch. 42.1 - Core Skill: Connections Nervous systems are one of...Ch. 42.1 - Scientists have determined that the brain mass of...Ch. 42.2 - Prob. 1CCCh. 42.2 - Prob. 2CCCh. 42.2 - Prob. 3CCCh. 42.2 - Prob. 4CCCh. 42.3 - Prob. 1CCCh. 42.3 - What was the hypothesis proposed by Gaser and...Ch. 42.3 - Prob. 2EQCh. 42.3 - CoreSKILL Based on the results described here and...
Ch. 42 - A nerve net consists of a. bilateral neurons that...Ch. 42 - Prob. 2TYCh. 42 - Prob. 3TYCh. 42 - The white matter of the CNS is composed of a....Ch. 42 - Prob. 5TYCh. 42 - Prob. 6TYCh. 42 - Prob. 7TYCh. 42 - Prob. 8TYCh. 42 - In humans, the ______ blank hemisphere of the...Ch. 42 - ______ blank is a progressive disease that causes...Ch. 42 - Prob. 1CQCh. 42 - Prob. 2CQCh. 42 - Core Concept: Systems New properties of life...Ch. 42 - Discuss how the two parts of the nervous system of...Ch. 42 - List the three major divisions of the brain of...
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- Preparing the body for the "fight-or-flight" response is the role of the a.parasympathetic division b.somatic nervous system c.cerebrum d.sympathetic divisionarrow_forwardSelect the statement that best describes the local circuitry of the spinal cord. a. There is no local circuitry within the spinal cord. b. Local circuits enable the same neurons to innervate both distal and proximal muscles. c. Neurons that innervate distal muscles are interconnected across the midline. d. None of the answers. e. Neurons that innervate proximal muscles are interconnected through many spiral cord segments.arrow_forwardThe autonomic nervous system is also called a. voluntary. b. involuntary. c. neuralgic. d. carpal.arrow_forward
- The peripheral nervous system that transfers signal to the brain is the:a. sympathetic nervous system b. parasympathetic nervous system c. sensory nervous systemd. central nervous systemarrow_forwardwhich of the following does not describe the somatic nervous system? A. motor neurons that innervate glands, cardiac and skeletal muscle B. a system of motor neurons that innervate all muscle cells c. voluntary nervous system d. general sensory for skin and joints.arrow_forwardThe vast majority of neurons are located in the a. Outer bulges of the neocortex b. Cerebellum and brainstem C. Autonomic Nervous System d. Creases in the neocortexarrow_forward
- Which of the following statements about the functional divisions of the nervous system is false?a. Somatic sensory neurons carry signals from a range of sources like skeletal muscles, the skin, and special sensory organs.b. Visceral sensory neurons carry signals from organs such as the heart and kidneys to the spinal cord and brain.c. Somatic motor neurons regulate involuntary secretions from glands and the contraction of smooth and cardiac muscles.d. The autonomic nervous system is a key regulator of homeostasisin the body.arrow_forwardWhich 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_forwardThe autonomic system has two divisions, called thea. CNS and PNS.b. somatic and skeletal systems.c. efferent and afferent systems.d. sympathetic and parasympathetic divisionsarrow_forward
- What are the components of the nervous system A. The brain and spine cord B. The somatic and automatic nerve system C. The sympathetic and parasympathetic divisions D. Sensory and motor neuronsarrow_forwardA bundle of axons in the peripheral nervous system is called a: A. Neuron B. Ganglion 1 C. Tractarrow_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
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