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Neural Control and Coordination Test - 32

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Neural Control and Coordination Test - 32
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  • Question 1
    1 / -0
    Spinal cord is the part of
    Solution
    • The central nervous system consists of the brain and spinal cord. It extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column. It is protected by meninges. 
    • The peripheral nervous system (PNS) is the division of the nervous system containing all the nerves that lie outside of the central nervous system (CNS).
    • The autonomic nervous system controls involuntary actions such as heart rate, digestion, respiratory rate, pupillary response, urination, and sexual arousal.
    • The somatic nervous system is the part of the peripheral nervous system associated with the voluntary control of body movements.
    So, the correct answer is 'Central nervous system'.
  • Question 2
    1 / -0
    The longest cell in the animal body is a/an
    Solution
    The longest cells in the human body are neurons. Neurons are cells within the nervous system and carry messages throughout the body. Although they range in size, some neurons are 3 feet long. These include the neurons that go from the skin into the spinal cord and up into the brain stem. Their impressive length makes neurons the longest cells in the body. 
    Therefore, the correct answer is option B.
  • Question 3
    1 / -0
    Cerebral cortex consists of
    Solution
    • Grey matter consists of cell bodies, dendrites and axon terminals of neurons and thus has all synapses.
    • It serves to process sensory information. Cerebral cortex is a thin highly convoluted layer of grey matter that covers cerebral hemispheres. 
    • Cerebral cortex is responsible for sensation, voluntary actions, and all conscious thought processes and thus consists of grey matter. 
    • White matter consists of myelinated and unmyelinated nerve fibers that carry impulses to and from the brain. It is mainly present in the sensory and motor areas of the brain. 
    • Dura mater is the outer most protective layer of the brain and is made up of tough, white fibrous connective tissue. 
    • Arachnoid mater is the middle protective layer of brain and consists of weblike connective tissue with thin strands. 

    Therefore, the correct answer is option A.
  • Question 4
    1 / -0
    The largest and well developed part of the brain is
    Solution
    a) Cerebellum serves to coordinate the voluntary movements of skeletal muscles as well as posture, balance and equilibrium. 
    b) Cerebrum serves to receive sensory inputs, to bring about integration before commanding voluntary motor responses, to coordinate the activities of another part of the brain, and to carry out higher thought processes for learning, memory, language and speech. 
    c) Midbrain is the small middle part of brain stem which is associated with vision, hearing, motor actions, arousal and temperature sensation. 
    d) Medulla oblongata consists of reflex centres that control heartbeat, blood vessel diameter and rhythm of breathing as well as other vital functions. 
    So, the correct answer is option B.
  • Question 5
    1 / -0
    The neurotransmitter substance found between a motor neuron and a muscle cell is
    Solution
    The neurotransmitter substance found between a motor neuron and a muscle cell is acetylcholine. In the autonomic nervous system, acetylcholine (ACh) is the neurotransmitter in the preganglionic sympathetic and parasympathetic neurons. ACh is also the neurotransmitter at the adrenal medulla and serves as the neurotransmitter at all the parasympathetic innervated organs. ACh is also the neurotransmitter at the sweat glands, and at the piloerector muscle of the sympathetic ANS. 
    Therefore, the correct answer is option D.
  • Question 6
    1 / -0
    Select the wrongly paired match
    Solution
     Frontal lobe of cerebrum is crucial in evaluation of information, judgement, decision making, and planning and response organization i.e. intellectual processes. It is the reward centres of limbic system (hypothalamus) regulate different emotions and sexual behaviour. Thus, correct option is C
  • Question 7
    1 / -0
    While walking home from night class, a college student was frightened by a barking dog. After walking to another block, she notices her breathing and heart rate have slowed down to normal levels. Which branch of her nervous system is responsible for these changes?
    Solution
    The parasympathetic nervous system is one of three divisions of the autonomic nervous system. Sometimes called as the rest and digest system, the parasympathetic system conserves energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles in the gastrointestinal tract. 
    Therefore, the correct answer is option B.
  • Question 8
    1 / -0
    Thermostat of mammalian brain is
    Solution
    The hypothalamus is responsible for certain metabolic processes and other activities of the autonomic nervous system. It synthesizes and secretes certain neurohormones, often called releasing hormones or hypothalamic hormones, and these, in turn, stimulate or inhibit the secretion of pituitary hormones. The hypothalamus controls body temperature, hunger, important aspects of parenting and attachment behaviors, thirst, fatigue, sleep and circadian rhythms.
    Therefore, the correct answer is option B.
  • Question 9
    1 / -0
    Which of the following tissues in mammals show the least capacity for regeneration?
    Solution
    Nervous tissues of the brain show the least capacity for regeneration, because of various roadblocks present in the diseased or injured CNS that hinders the pathways for the regeneration of neurons in the brain.
    So, the correct answer is 'Nervous tissue of brain'.
  • Question 10
    1 / -0
    Animals with only two germ layers are known as ________
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