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Structural Organisation in Animals Test - 69

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Structural Organisation in Animals Test - 69
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  • Question 1
    1 / -0
    The given figure is the reproductive system of a female cockroach. The correct labelings indicted by A. B and C are respectively

    Solution
    • The female reproductive system of cockroach (Fig. 73.35) consists of a pair of ovaries, vagina, genital pouch, collateral glands, spermathecae and the external genitalia.
    • The A, B & in the given picture are: 
    A - Spermathecae:
    • These are a pair of club-shaped, unequal-sized, one spermatheca being larger than the other, structures.
    B - Collateral Glands:
    • There is a pair of white much-branched collateral glands, the left is much larger than the right.
    C - Gonapophyses:
    • The external genitalia of female lie concealed inside the gymnatorium. They consist of an ovipositor formed by two gonapophyses. 

    So the answer is 'A-Spermathecae, B- Collateral glands, C-Gonapophyses'.

  • Question 2
    1 / -0
    Neural proteins are mainly synthesized in__________
    Solution
    • The human body is made up of trillions of cells. Cells of the nervous system called nerve cells or neurons, are specialized to carry "messages" through an electrochemical process. Neurons carry out basic cellular processes such as protein synthesis and energy production.
    • Protein synthesis in the extensions of nerve cells, called dendrites, Local protein synthesis in dendrites, not in the cell body of nerves, provides the ability to respond rapidly and selectively to external stimuli. 

    So the answer is 'Dendrites'. 
  • Question 3
    1 / -0
    Which of the following is false about the heart of cockroach?
    Solution
    A cockroach's heart has 13 chambers. The blood of the cockroach is white. The pulsatile part of the heart has some valves, which pumps the blood. The heart is shaped like tubes. Each chamber has an ostia.
    So, the correct option is 'None of the above'.
  • Question 4
    1 / -0
    Bartholin's gland occurs in 
    Solution
    The Bartholin's glands are also called Bartholin glands or greater vestibular glands are two pea-sized compound racemose glands located slightly posterior and to the left and right of the opening of the vagina. They secrete mucus to lubricate the vagina.
    So the correct option is 'Females andShelps in vestibular lubrication'.
  • Question 5
    1 / -0
    Mark the incorrect statement for cockroach
    Solution
    The spermatophore is a bundle of sperm contained in a protective packet. Males of many insects(as in cockroach) use spermatophore to transfer sperm to females. Their fertilized eggs are enclosed in a capsule or protective coat called ootheca. in an average, females produce 9-10 oothecae, each containing 14-16 eggs. 
    Development of cockroach is paurometabolous i.e., exhibit gradual development and juvenile resemble an adult with some exceptions.
    Nymph grows by moulting about 13 times to reach the adult form and they are sexually immature and wings are either absent or reduced. Only adults have wings.
    So the correct option is 'Nymph undergoes 3-4 moults to reach adult form'.
  • Question 6
    1 / -0
    Which of the following muscles is present in the urinary bladder?
    Solution
    The muscle present in the urinary bladder is called 'detrusor muscle' and is a smooth muscle mostly present in the walls of the bladder. It is a single-unit smooth muscle as the whole bundle contacts in order to perform various functions of the organ. These muscles relax in order to store urine in the bladder and contract when urine is to be released.
    So, the correct answer is option A.
  • Question 7
    1 / -0
    If an earthworm is possessing $$100$$ segments rectum starts from $$23^{rd} $$ , in how many segments typhosole is extended?
    Solution
    The typhlosole of the earthworm starts from the 27$$^{th}$$ segment and continues till the segment where rectum begins. So, it continues till the last from the  23$$^{rd}$$ segment. An earthworm having 100 segments will have 48 segments that will be occupied by the typhlosole.
    So, the correct answer is '48'
  • Question 8
    1 / -0
    The type of junction that prevents separation of the cardiac cells during its functioning is
    Solution
    Cardiac muscle cells are rectangular shaped cells connected by regions called intercalated discs. The gap junctions, which are protein-lined tunnels, allow direct transmission of the depolarizing current from cell to cell, across the chambers of the heart, so that the cells contract in unison.
    So the correct answer is 'Gap junction'.
  • Question 9
    1 / -0
    There are _________ pairs of alary muscles found in cockroach.
    Solution
    There are 12 pairs of alary muscles found in cockroach.
  • Question 10
    1 / -0


    A student was asked to observe a slide of skeletal muscle fiber under the microscope. The correct diagrams(s) given below that resemble(s) the slide of skeletal muscle is/are

    Solution
    Skeletal muscles have the following features:
    1. These are striated due to the presence of sarcomere.
    2. These are unbranched
    3. The cells are multinucleate
    4. These are cylindrical in shape
    These features are shown in image D. 
    Image A shows smooth muscles that are spindle-shaped and non-striated. 
    Image B shows cardiac muscles that are striated, branched and uni-nucleate.
    Image C does not resemble any muscle. It is enucleated.
    Image D shows the striated, multi-nucleated, unbranched fibers that are skeletal muscles.
    Hence, the correct answer is 'D'
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