Concept explainers
Introduction:
The nervous system is defined as the network of neurons spread throughout the body and
conducts the signals between different body parts. It is majorly divided into the central nervous
system and peripheral nervous system. The coordination between the two mediates different
functions performed by the body.
Answer to Problem 1TY
The correct answer is option (c) the central nervous system.
Explanation of Solution
Explanation/justification for the correct answer:
Option (c) the central nervous system. The central nervous system is mainly involved in controlling functions like movements, awareness, thoughts, sensations, memory, and speech. It consists of the brain and the spinal cord which are involved in the processing of sensory inputs and sends motor signals. Hence, this option is correct.
Explanation for incorrect answer:
Option (a) the peripheral nervous system. The Peripheral nervous system has a network of nerves present all over the body and connects to the CNS. Thus, it does not constitute the brain and the spinal cord. Hence, this option is incorrect.
Option (b) the efferent division of the nervous system. The efferent division connects the central nervous system to the effector system and thus allows the CNS to control various responses. Hence, this option is incorrect.
Option (d) autonomic nervous system. It is a division of the peripheral nervous system and regulates digestion, sexual arousal, respiration, blood pressure, and heart rate. Thus, it does not constitute the brain and the spinal cord. Hence, this option is incorrect.
Option (e) the central and peripheral nervous system. The CNS and the PNS are the two major divisions of the nervous system but the brain and the spinal cord are part of the central nervous system only. Hence, this option is incorrect.
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Chapter 33 Solutions
Principles of Biology
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- The autonomic nervous system consists of: The sympathetic and parasympathetic divisions The cerebral hemisphere and the corpus callosum The somatic nervous system The cerebellum and medulla oblongata The brain and spinal cordarrow_forwardThe central nervous system provides neural integration of efferent information transmitted from the autonomic nervous system. True or falsearrow_forwardWhich of the following statements is not true about neurons? When there is no active nerve impulse, the concentration of Na+ ions outside of the cell is greater than inside the cell After a nerve impulse passes a region of the axon, that region will not be able to carry another impulse again for a brief period of time When a nerve impulse occurs, sodium channels in the axon open first, followed by potassium channels The inside of an axon is typically negatively charged compared to the outside of an axon The cell uses energy to actively pump Na+ ions into the axon and K+ ions out of the axon.arrow_forward
- The autonomous nervous system regulates involuntary functions of the body and can be subdivided into the sympathetic and the parasympathetic nervous system. Both of these systems control the same group of body functions, but have opposite effects on the functions they regulate. The sympathetic nervous system prepares the body for intense physical activity like the fight-or-flight response. The parasympathetic nervous system has the opposite effect and relaxes the body and inhibits or slows many high energy functions. Which of the following involuntary effects in the body are brought about by the sympathetic nervous system during a fight-or- flight situation? i. Increased salivation ii. Increased digestion ii. Loss of bowel and bladder control iv. Body shivering Сrying Pupil dilation B. i, iv and v V. vi. A. i, ii and vi C. iii, iv and vi D. iii and varrow_forwardThese neurons belongs to the CNS: (More than one possible choice) A neuron in the brain A neuron carrying a signal into a skeletal muscle A neuron carrying a signal into cardiac muscle A neuron carrying signals form receptors in the skin A neuron carrying signals from the stomach a neuron in the spinal cord grey matterarrow_forwardAll of the followings are correct except, ---------------------. Even “simple” nervous systems can display complex behavior More complex nervous systems show centralization In many species, ganglia grouped together at the anterior end form an integrating center Nerve nets carry action potentials in both directions interconnected nerves are called gangliaarrow_forward
- A very rostral coronal slice of the human brain is most likely to cut through The occipital lobe The frontal lobe The temporal lobe The parietal lobe -------------------------------- The critical neural structures for initiating an action potential is The dendrites The synaptic terminals The soma The axon hillock.arrow_forwardHuman nervous system parts and functionsarrow_forwardShow the parts and functions of the Central Nervous System. Labled each part propey.arrow_forward
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