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Neural Control and Coordination Test - 50

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Neural Control and Coordination Test - 50
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  • Question 1
    1 / -0
    Salivation is under control of
    Solution
    The medulla oblongata lies just inside the skull and above the spinal cord. The medulla controls the vital reflexes underlying heart rate, respiration, vomiting, salivation, sneezing, and coughing via the cranial nerves that have nuclei (clusters of neuronal cell bodies) in this region.
    Hence, the correct answer is (C)
  • Question 2
    1 / -0
    Which is not present in temporal lobe
    Solution
    Correct option: C.
    Broca's area is situated in the frontal part of the left hemisphere.
    Function: Speech production, language comprehension, hand movements, and sensorimotor learning and integration.
    Auditory area, Olfactory area, and Wernicke's area are situated in the temporal region of the brain.
  • Question 3
    1 / -0
    During depolarisation of neuron
    Solution
    The depolarization, also called the rising phase, is caused when positively charged sodium ions (Na+) suddenly rush through open voltage-gated sodium channels into a neuron. As additional sodium rushes in, the membrane potential actually reverses its polarity.
    Hence the correct option is B.
  • Question 4
    1 / -0
    Which is not part of brain stem
    Solution
    The brain consists of the cerebrum, brain stem, and cerebellum. The brain stem consists of midbrain, pons, and medulla. On the dorsal aspect of the midbrain, corpora quadrigemina: four colliculi, two inferior and two superior are found, which are reflex center involving vision and hearing. Whereas cerebrum is the part of the forebrain.
  • Question 5
    1 / -0
    Cerebrum is part of ________.
  • Question 6
    1 / -0
    Iodopsin occurs in
    Solution
    A. Iris is a opaque and pigmented structure in eye. It is visible as coloured portion. It regulates the amount of light entering the eye by controlling the size of pupil.
    B. Rods are the photoreceptor cells that contain rhodopsin pigment and associated with scotopic vision of eye i.e. vision under low light.
    C. Cones are the photoreceptor cells that contain iodopsin, porpyrosin and cyanopsin pigments. These cells are associated with the daylight vision and colour vision of eyes.
    D. Lens of eye is a crystalline structure in the eye ball which is held in place by ligaments that are attached to ciliary body. It is biconvex in nature and focus the light rays on the retina.
    So, the correct answer is 'Cones'.
  • Question 7
    1 / -0
    Ceruminous or wax producing glands are modified
    Solution
    Ceruminous glands are tubular glands present in external auditory canal which produce earwax. The are modified apocrine sebaceous glands. Apocrine glands are generally present in the skin and secrete their products on the skin surface. Cerumen is a modified form of sebaceous secretion. It is secreted from ceruminous glands.
    So, the correct answer is 'Apocrine sweat glands'.
  • Question 8
    1 / -0
    Sensory neurons of retina are
    Solution
    Rods and cones are sensory neurons of eye as they transmit information to other cells.
    • Rods are the photoreceptor cells that contain rhodopsin pigment and associated with scotopic vision of eye i.e. vision under low light.
    • Cones are the photoreceptor cells that contain iodopsin, porpyrosin and cyanopsin pigments. These cells are associated with the daylight vision and colour vision of eyes.
    So, the correct answer is 'Rods and cones'.
  • Question 9
    1 / -0
    Light sensitive cells of eye are present in __________.
    Solution
    A. Cornea is the anterior portion of sclera which absorbs oxygen from the air. It is the only part of human body which is devoid of blood supply and absorbs oxygen directly from the air.
    B. Sclera is the external layer of eye that maintains the shape of eye and also protects it.
    C. Choroid is the middle layer of eye that contains many blood vessels.
    D. Retina is present in the inner layer of eye. The image is perceived by brain and formed on the retina.
    Light sensitive cells are cones and rods. They are present in the retina.
    So, the correct answer is 'Retina'.
  • Question 10
    1 / -0
    A student has problem in reading as he is unable to contract his ______.
    Solution
    A. Suspensory ligaments attach the eye lens with the ciliary body.
    B. Ciliary muscles change the shape of eye lens to focus on nearby and distant objects.
    C. Pupil is an aperture in eye through which light enters the eye.
    D. Iris is pigmented and opaque structure of eye which controls the amount of light entering the eye by changing the size of pupil.
    If a student has problem in reading, this means his eye lens is not able to focus on the alphabets and this is due to inability of the ciliary muscles to contract.
    So, the correct answer is 'Ciliary muscles'.
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