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Structural Organisation in Animals Test - 24

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Structural Organisation in Animals Test - 24
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  • Question 1
    1 / -0
    Fats are stored in human body as_________________.
    Solution
    $$\textbf{Correct option:}$$  Option B
    $$\textbf{Explanation for correct option:}$$
    Option B
    $$\bullet$$   Adipose tissue are fat-storing tissues found below the skin
    and between internal organs. 
    $$\bullet$$  Their cells are filled with fat globules and act as an insulator.

    $$\textbf{Explanation for incorrect options: }$$
    Option A: Cuboidal epithelium cells are cube-shaped cells that provide mechanical support. They form the lining of kidney tubules and ducts of salivary glands.
    Option C: Bone is connective tissue. It forms the framework that supports the body. It also anchors the muscles and supports the main organs of the body.
    Option D: Cartilage is a connective tissue that has widely spaced cells. They have a solid matrix composed of proteins and sugars. They smoothen the bone surfaces at joints.

    $$\textbf{Conclusion:}$$  Thus, fats are stored in the human body as adipose tissue.

  • Question 2
    1 / -0
    Striated muscle fibres possess
    Solution
    Striated muscle fibres appear to have transverse strips when viewed under the microscope. This is because they show alternative transverse light and dark bands. Most striated muscles are attached to bones by tendons. They are also called skeletal muscles.

  • Question 3
    1 / -0
    A person met with an accident in which two long bones of hand were dislocated. Which among the following may be the possible?
    Solution
    Tendon is a tough fibrous connective tissue which connects muscle to bone. As two bones are dislocated so, tendon break is not possible.  
    Skeletal muscle helps to maintain the structural framework of the body. Due to breakage of skeletal muscle 2 bones cannot be dislocated. 
    Areolar tissue is found in bone marrow. It fills the space inside the organ, supports the internal organ and also helps in tissue repair. 
    The ligament is a fibrous connective tissue, which connects bone to another bone. Hence, breakage of the ligament can be the reason for dislocation. Therefore, option C is correct.
  • Question 4
    1 / -0
    Nucleated part of nerve cell is called as
    Solution
    Axon is the long, thin hair like part arising from the cell body of the neuron. 
    Dendrites are short, branched parts arising from cell body or cyton. Dendrites are many in number.  
    Cyton is a part of neuron containing the nucleus. It is also called cell body. Therefore, option C is correct. 
  • Question 5
    1 / -0
    Nervous tissue is not found in_____________.
    Solution
    Brain, spinal cord and nerves constitute nervous tissue. Tendon is a fibrous connective tissue connecting bones to muscles. Nervous tissue is absent in tendon. These are made up of collagen. Tendons and muscles work together to move bones. Therefore, option C is correct. 

  • Question 6
    1 / -0
    Nerve fibre is
    Solution
    A nerve fibre is a long, thin hair-like extension arising from the cell body of a neuron. In the myelinated nerve, the axon is ensheathed with myelin. Therefore, option C is correct. 
  • Question 7
    1 / -0
    Largest number of cell bodies of neuron in our body are found in the_________.
    Solution
    The largest number of cell bodies of neurons in our body is found in the brain.
    The human brain is the main organ of the human nervous system. It is located in the head, protected by the skull. It has the same general structure as the brains of other mammals, but with a more developed cerebral cortex.
    The human brain is composed of neurons, glial cells, and blood vessels.
  • Question 8
    1 / -0
    Synapse is the junction of________________.
    Solution
    A synapse is a junction that permits the nerve cell to pass an electrical signal or chemical signal to another nerve cell. Hence, it is a junction of nerve cells. 
    Therefore, option B is correct.  

  • Question 9
    1 / -0
    Neurons are classified on the basis of
    Solution
    Neurons can be differentiated as unipolar, bipolar or multipolar depending upon the number of processes arising from the cell body. 
    Unipolar neuron possesses just one process emerging from the cell. 
    Bipolar neuron possesses two processes. These processes arise from each end of the cell body. 
    Multipolar shows many processes arising from the cell body.
    Therefore, option B is correct. 
  • Question 10
    1 / -0
    Which tissue does lack blood supply and heals slowly?
    Solution
    • Nervous tissue is well supplied with blood vessels. 
    • Muscle tissue has an abundant blood supply. 
    • Bone cells are embedded in a hard matrix that is made up of salts of calcium and phosphate. Bone is supplied with blood vessels through the haversian canal. 
    • Cartilage has widely spaced cells that are embedded in the matrix made of proteins and sugars. Cartilage has limited repair capabilities because chondrocytes are bound in lacunae and hence they cannot migrate to damaged areas. Therefore, cartilage damage is difficult to heal. Also, because hyaline cartilage does not have a blood supply, the deposition of the new matrix is slow. 

    Therefore, option C is correct. 


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