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Neural Control and Coordination Test - 12

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Neural Control and Coordination Test - 12
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  • Question 1
    1 / -0
    The efferent process of neuron is known as 
    Solution
    The long slender projection of a nerve cell that conducts electrical impulses away from the neuron's cell body or soma is called an axon or nerve fibre. The function of the axon is to transmit information to different neurons, muscles and glands. Hence it is called the efferent process.
    Hence the correct option is A.
  • Question 2
    1 / -0
    Learning is related to which part of the human brain?
    Solution
    The cerebrum or cortex is the largest part of the human brain, associated with higher brain function such as thought and action. The cerebral cortex is divided into four sections, called as lobes. The frontal lobe, parietal lobe, occipital lobe and temporal lobe. 
    Frontal lobe - associated with reasoning, planning, parts of speech, movement, emotions, and problem solving. 
    Parietal lobe - associated with movement, orientation, recognition, perception of stimuli. 
    Occipital lobe - associated with visual processing. 
    Temporal lobe - associated with perception and recognition of auditory stimuli, memory, and speech.
    Thus, the correct answer is option C.
  • Question 3
    1 / -0
    The area where the myelin sheath is absent in the nerve fibre is called ________. 
    Solution
    A nerve cell (neuron) comprises a cyton (cell body), dendrites, and a single nerve fibre or axon. Some nerve fibres have a covering of the myelin layer that insulates the axons. Nodes of Ranvier are small gaps found in such myelinated axons. They propagate the transmission of nerve impulses.
    Thus, the correct answer is option (D), 'Node of Ranvier'.

  • Question 4
    1 / -0
    Which among the following is not part of the actual structure of a neuron?
    Solution
    Schwann cells are neuroglial cells which are non-excitable cells that support the neurons. They secrete the myelin sheath that covers the axons. Dentrites, axon and Nissl's bodies are all parts of the neuron.
    So, the correct answer is option C.
  • Question 5
    1 / -0
    Myelin sheath is formed by
    Solution
    The axon is covered by a lipid-rich membrane called myelin sheath. The myelin sheath is formed by Schwann cells and each Schwann cell covers a part of the axon. The region where axon is not covered by the myelin sheath called node of Ranvier.
    Thus, the correct answer is the option C.
  • Question 6
    1 / -0
    What is found in primates brain?
    Solution
    The neocortex, also called the neopallium, isocortex, or the six-layered cortex, is a set of layers of the mammalian cerebral cortex involved in higher-order brain functions such as sensory perception, cognition, generation of motor commands, spatial resoning and language.
    So, option C is the correct option.
  • Question 7
    1 / -0
    Which one of the following is not essentially a part of nervous system?
    Solution
    A nerve cell or neuron is the structural and functional unit of the nervous system. It has a cell body called cyton and two types of processes called axon and dendrite. Dendrites are the short cytoplasmic processes of the cell body, which receive stimulus from other neurons. The axon is a long extension of a neuron and may be covered by a lipid-rich membrane, called a myelin sheath.
    Intermedin, on the other hand, is a hormone produced by the intermediate lobe of the pituitary gland in certain vertebrates. It is also known as melanocyte-stimulating hormone.
    Thus, the correct answer is option D.

  • Question 8
    1 / -0
    The afferent process of neuron is the:
    Solution
    The dendrites of the neuron are called 'afferent processes' because they transmit impulses to the neuron cell body.
    Thus, the correct answer is an option (B), 'Dendrite'.
  • Question 9
    1 / -0
    Which part of human brain is largest?
    Solution
    • The cerebrum, which develops from the front portion of the forebrain, is the largest part of the mature brain.
    • It consists of two large masses, called cerebral hemispheres, which are connected by a deep bridge of nerve fibers called the corpus callosum and are separated by a layer, called the falx cerebri. 
      Hence, option C is correct.
  • Question 10
    1 / -0
    White matter consists of
    Solution
    White matter is a component of the central nervous system, in the brain and spinal cord. The white matter is placed on the grey matter in the brain while it lies outer to the grey matter in the spinal chord. It consists mostly of glial cells and myelinated axons that transmit signals from one region of the cerebrum to another and between the cerebrum and lower brain centres.
    Thus, the correct answer is option A.
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