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Control and Coordination Test -11

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Control and Coordination Test -11
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Weekly Quiz Competition
  • Question 1
    1 / -0

    Which is the longest part of the neuron?

    Solution

    Axon is the longest part of neuron that connects cell body and nerve ending. Axons are in effect the primary transmission lines of the nervous system.

  • Question 2
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    Which centre regulates swallowing, coughing and vomiting?

    Solution

    The medulla oblongata is located in the brain stem, anterior to cerebellum. This is a cone-shaped nerve cell located in the hind brain, which controls a number of involuntary functions like coughing, sneezing and vomitting.

  • Question 3
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    Which of the following performs dual functions i.e. both exocrine and endocrine functions?

    Solution

    Pancreas acts as dual gland as pancreas has the dual function of secreting hormones into blood (endocrine) and secreting enzymes through ducts (exocrine).

  • Question 4
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    What is BMR?

    Solution

    BMR stands for Basal metabolic rate, and it refers to number of calories that human body needs to function is called basal metabolic rate.

  • Question 5
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    Which of the following impact's the growth by reversing the effects of auxin?

    Solution

    Abscisic acid is a plant hormone that acts as growth retardator for plant by reversing the effect of auxin.

  • Question 6
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    Sympathetic and parasympathetic both are the components of

    Solution

    Sympathetic and parasympathetic both are the components of automonic nervous system (ANS).

  • Question 7
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    Spinal cord is enclosed in bony cage called ?

    Solution

    spinal cord is protected by a bony structure called vertebral column, it present in dorsal surface.

  • Question 8
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    Which Hormone maintain calcium and phosphate levels in the blood ?

    Solution

    Calcitonin hormone maintains the calcium and phosphate levels in the blood. It provides strong bones and healthy teeth.

  • Question 9
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    What is the  function of glucagon ?

    Solution

    Glucagon hormone is released from pancreas that increases the sugar level in the blood to facilitate the need of  sugar in our body.

  • Question 10
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    Which neuron carries impulses from receptor to brain?

    Solution

    Sensory neuron carries electrical impulses from receptor to  brain while motor neuron carries electrical impulses from brain to effectors.

  • Question 11
    1 / -0
    Positive geotropic response is __________ shown by roots.
    Solution
    Roots grow mostly positively geotropic. That is, they grow towards the earth. Whereas, shoots are negatively geotropic.
  • Question 12
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    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 13
    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 14
    1 / -0
    Nodes of Ranvier are found in
    Solution
    Correct option: B

    Explanation:
    • Nodes of Ranvier are found in Myelinated nerve fibres. The gaps between two adjacent myelin sheaths are called nodes of Ranvier
    • Non-myelinated nerve fibres are enclosed by a Schwann cell that does not form a myelin sheath around the axon. Nodes of Ranvier is absent in them.
      Thus, Option B is correct.

  • Question 15
    1 / -0
    Longest cell in the human body is
    Solution
    The longest cell in the human body is the neuron with a length of 90cm-100cm, linking the central nervous system (brain and spinal cord) to other parts of the body.

    So, the correct answer is option A.
  • Question 16
    1 / -0
    Antiauxin used in picking cotton balls is
  • Question 17
    1 / -0
    Neuron is different from the muscle, due to the presence of:
    Solution
    Alternate light and dark bands are present only in skeletal muscles. Muscles contain special proteins called contractile proteins. Dendrites are the short cytoplasmic extensions of the cell body of a neuron, which receive stimulus from other neurons. Dendrites are part of a nerve fibre, not a muscle fibre. 
    Thus, the correct answer is option D.
  • Question 18
    1 / -0
    Which of the following pairs is incorrectly matched 
  • Question 19
    1 / -0
    Myelin sheath covers ____________.
    Solution
    • Axons of neurons can be either myelinated or non-myelinated. 
    • Myelin sheath is made up of proteins and fatty substances. 
    • It allows electrical impulses to transmit quickly and efficiently along the nerve cells.
    So, the correct answer is option 'B'.

  • Question 20
    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'.

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