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Control and Coordination Test -14

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Control and Coordination Test -14
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  • Question 1
    1 / -0

    Auxins are

    Solution

    Auxin is a plant hormone produced in the stem tip that promotes cell elongation. Auxin moves to the darker side of the plant, causing the cells there to grow larger than corresponding cells on the lighter side of the plant.

  • Question 2
    1 / -0

    The junction between the axon of one neuron and dentrite of the next is called

    Solution

    A synapse is an important part of the nervous system involved in the transmission of nerve signals. 

  • Question 3
    1 / -0

    Which of the following is nastic movement?

    Solution

    Nastic movements are plant movements that occur in response to environmental stimuli but unlike tropic movements.

  • Question 4
    1 / -0

    Posture and balance of the body is controlled by.

    Solution

    It coordinates and regulates muscular activity.

  • Question 5
    1 / -0

    Which growth hormone is present in the tip of the stem?

    Solution

    Auxins are a powerful growth hormone produced naturally by plants. They are found in shoot and root tips and promote cell division, stem and root growth. 

  • Question 6
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    Name the connective tissue covering of the brain

    Solution

    The meninges refer to the membranous coverings of the brain and spinal cord.

  • Question 7
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    Which part of the brain is concerned with muscular coordination in the body?

    Solution

     It is responsible for precision of voluntary actions and maintaining the posture and balance of the body. 

  • Question 8
    1 / -0

    Which one of the endocrine gland is known as a master gland

    Solution

    Growth hormone is one of the hormones secreted by the pituitary. As its name indicates, growth hormone regulates growth and development of the body.

  • Question 9
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    The production of which hormone in adults lead to a gorilla – like appearance called acromegaly?

    Solution

    Growth harmone produce by pituitary gland and when it acts on some tissues directly it cause gorilla or growth harmone disorder.

  • Question 10
    1 / -0

    If the parathyroid gland is damaged, there may be a

    Solution

    In hypocalcemia, the calcium level in blood is too low. A low calcium level may result from a problem with the parathyroid glands, as well as from diet, kidney disorders, or certain drugs.

  • Question 11
    1 / -0
    Which organ cells produce gastrointestinal hormones?
    Solution
    All of the above are gastrointestinal hormones,
  • Question 12
    1 / -0
    Which of the following systems provide control and coordination in human?
    Solution
    The nervous system provides control and coordination to the body of human beings. It generates electrical impulses and helps in sending and receiving signals from different parts of the body. This helps in the control and coordination of the body.
    The correct option is A.
  • Question 13
    1 / -0

    STATEMENT-1: Morphactin inhibits mitosis.
    STATEMENT-2: Morphactin is derived from fluorene-9-carboxylic acid.
    Select the correct option regarding given statements:
    Solution
    Morphactins inhibit mitosis in the root meristem and disturb the polarity of cell division.
    Morphactin is a derivative of fluorene-9-carboxylic acid and is often called "antigibberellin"
    Thus,  STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1.
  • Question 14
    1 / -0
    Which of the following is a dicarboxylic acid with one double bond?

    Solution
    Traumatic acid is a dicarboxylic acid with one double bond. Its molecular formula is $$C_{12}H_{20}O_4$$. It is found in some plants and stimulates healing when a plant tissue undergoes trauma.

  • Question 15
    1 / -0
    Match the following.
    SET A                                        SET B
    Name of hormone            Functional group in hormones
    1) Testosterone                      a) double bond
    2) Estradiol                             b) Ketone
    3) Progesterone                     c) Alcohols
    4) Ethylene                            d) Alcohol and ketone
    Solution
    Testosterone contains alpha beta unsaturated carbonyl group and a secondary OH group.
    Estradiol contains a phenolic OH group and a secondary alcohol.
    Progesterone contains alpha beta unsaturated carbonyl group and carbonyl group.
    Ethylene contains a carbon carbon double bond.

  • Question 16
    1 / -0
    The hormone insulin is secreted by which organ?
    Solution
    The hormone insulin is secreted by the pancreas. Inside the pancreas, beta cells make the hormone insulin. With each meal, beta cells release insulin to help the body use or store the blood glucose it gets from food.
    So, the correct answer is option D.
  • Question 17
    1 / -0
    For artificial ripening of fruit, which of the following is used?

    Solution
    All of the given options are phytohormones (plant hormones).  
    Plant hormones control all the growth and development activities like cell division, enlargement, flowering, seed formation, dormancy and abscission. The major function of the given hormones are as follows:  
    A) Auxin- Cell elongation of stems and roots 
    B) Cytokinin- Promotes lateral and adventitious shoot growth by inducing cell division. 
    C) Ethylene- Hastens the ripening of fruits
    D) Gibberellin-  Breaks seed dormancy promotes flowering  Hence, ethylene gas is used for the artificial ripening of fruits. 
  • Question 18
    1 / -0
    Receptors of hormones are generally:
    Solution
    Receptors of hormones are generally proteins. 

    Hormones affect distant cells by binding to specific receptor proteins in the target cell resulting in a change in cell function. When a hormone binds to the receptor, it results in the activation of a signal transduction pathway. 

    This may lead to cell type-specific responses that include rapid non-genomic effects or slower genomic responses where the hormones acting through their receptors activate gene transcription, resulting in increased expression of target proteins.

    Option D is correct.
  • Question 19
    1 / -0
    Which of the following substance acts as stimulator?
    Solution
    Hormones acts as stimulator. Hormones are essential for every activity of life, including the processes of digestion, metabolism, growth, reproduction, and mood control. Many hormones, such as neurotransmitters, are active in more than one physical process. To release active hormones quickly into the irulation, hormone biosynthetic cells may produce and store biologically inactive hormones in the form of pre- or prohormones. These can then be quickly converted into their active hormone form in response to a particular stimulus.
  • Question 20
    1 / -0
    Which of following hormone is produced by testis?
    Solution
    A) Correct option C

    B) Explanation for correct option
    • Testosterone is the primary sex hormone in males. 
    • It is a steroid hormone secreted by testis in the Leydig cells also known as interstitial cells. 
    • Testosterone helps in the spermatogenesis and the development of male secondary sexual characters.
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