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Structural Organisation in Animals Test - 44

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Structural Organisation in Animals Test - 44
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  • Question 1
    1 / -0
    Intercalated discs are present in
    Solution
    Cardiac muscle is made up of a type of muscle cells called cardiomyocytes. These muscle cells are connected to each other by an intercalated disc that helps them to act as a single functional organ.
    So, the correct option is 'Cardiac muscles'.
  • Question 2
    1 / -0
    Outer layer of skin that frog casts off is composed of:
    Solution
    Simple squamous epithelium is a single layer of large flat cells. It is also called pavement epithelium. It is present in the outer layer of skin of a frog, which is usually cast off by a process called moulting.
    So, the correct answer is option A.
  • Question 3
    1 / -0
    Neuro-fibrils are present in ___________.
    Solution
    A. Cyton
    EXPLANATION: Neuro-fibrils are found in the cyton. Cyton is the main part of the neuron and consists of the nucleus and cytoplasm. It is also called as the cell body of neurons, which helps to carry impulses from dendrites to the axon.
  • Question 4
    1 / -0
    The outer covering of non-myelinated neurons in brain is?
    Solution
    Unlike unmyelinated axons in peripharal nerves which are embedded in neurilemma of Schwann cells, the axons of central nerves do not have any covering. They are lined by the plasma membrane which is called Axolemma.
    Hence the correct option is B.
  • Question 5
    1 / -0
    ____________ is present at the region of joining of two cardiac muscle cells 
    Solution
    The intercalated disc is a unique feature of cardiac muscle, which is present in the region of joining of two cardiac muscle. This intercalated disc help in the contraction of heart muscles in synchronization.
    On the other hand, the basement membrane and fibres are features of skeletal muscle, and Ligaments are the connective tissue that connects two bones at the joint. Hence the correct answer is C.
  • Question 6
    1 / -0
    Which one is connected with different types of connective tissues?
    Solution
    There are mainly four types of basic tissues in animals i.e. Connective Tissue, Epithelial Tissue, Muscle Tissue & Nervous Tissue. Out of all the four options, only Option D contains the connective tissue alone i.e. Cartilage, Adipose tissue, and Blood. 
    Hence the correct option is D.
  • Question 7
    1 / -0
    Direction of nerve impulse is reversed in nerve with.
    Solution
    Answer is option A i.e. "Axo-axonic"
    Axo-axonic is a type of neural structure synapse between two axons. In case case, the axon of one neuron makes synapse with axon of the other neuron (i.e both, site of neurotransmitter release and site of receptor binding, are axons). It is essential for the transmission of nerve impulses. Axoaxonic junction modulate neuronal transmission by either inhibiting or facilitating depolarization at the presynaptic membrane.
  • Question 8
    1 / -0
    Squamous epithelium occurs in inner lining of:
    Solution
    Squamous epithelium is also called pavement epithelium. They are composed of large flat cells arranged in a single layer. These are present in the inner linings of the lung alveoli and terminal bronchioles and are involved in the exchange of gases between lung alveoli and blood capillaries.
    So, the correct answer is 'Lung alveoli'.
  • Question 9
    1 / -0
    Match the columns.
    Column IColumn II
    aLigamentpStores Fat
    bTendonqConnect Bone to Bone
    cAreolar TissuerConnect Muscle to Bone
    dAdipose TissuesForms Blood cells
    tFilling Tissue
    Solution
    B. a-q, b-r, c-t, d-p
    EXPLANATION: Ligament is a fibrous connective tissue, which connects bone to bone. Ligament helps to hold structures together and keep the bones stable. 
    Tendon is also a fibrous connective tissue, which attaches bone to muscle. Tendon helps to move the bones smoothly. 
    Areolar tissue is a loose connective tissue. The fibers of this tissue is arranged in a net and act as a filling tissue. 
    Adipose tissue is also a type of loose connective tissue. This tissue is made up of adipocytes. It stores energy in the form of fat and is found under the skin, between muscles, within bone marrow and in breast tissue.  
  • Question 10
    1 / -0
    Which is not part of nervous tissue?
    Solution
    Intermedin is also called a melanocyte-stimulating hormone. This hormone is not a part of the nervous system. Intermedin regulates skin pigmentation. On the other hand, Cyton and axon are the parts of a nerve cell (or neuron), and myelin is a fatty substance surrounding neurons. Hence all three cytons, axons, and myelin are the part of the nervous system & intermedin is not a part of nervous system.  The correct answer is D.
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