Tag: tissue level of organisation

Questions Related to tissue level of organisation

From the list of characters given. Choose the characteristic which are exclusive to birds.
(a) Pneumatic bones
(b) Lungs with air sacs
(c) Four chambered heart
(d) Homoithermy
(e) Feathers
(f) Scales
(g) Crop and gizzard.

zoology tissue level of organisation specialized cells in animals tissues and types of tissues levels of organisation in animals

  1. (a), (b), (d), (e) & (g)

  2. (a), (b) & (e)

  3. (a), (b)

  4. (e) only

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Correct Option: A

The direction of impulse in a typical neuron is

zoology tissue level of organisation specialized cells in animals tissues and types of tissues levels of organisation in animals

  1. Axon to dendron

  2. Dendron to axon

  3. Both A and B

  4. None of these

Show answer
Correct Option: B
Explanation:

In a typical neuron, the incoming signals are first taken up by the dendrites and they are then passed on to the axons via the neuron body. 

Image result for The direction of impulse in a typical neuron is

So, the correct answer is 'Dendron to axon'. 

Neurilemma is outer covering of _______________.

zoology tissue level of organisation neural tissue structure of neuron nervous tissues

  1. Blood capillaries

  2. Muscle fibre

  3. Intestine

  4. Nerve fibre

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Correct Option: D

Plasmalemma of axon is called ______________.

zoology tissue level of organisation neural tissue structure of neuron nervous tissues

  1. Axolemma

  2. Neurilemma

  3. Sarcolemma

  4. None of these

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Correct Option: A

Neuro-fibrils are present in ___________.

zoology tissue level of organisation neural tissue structure of neuron nervous tissues

  1. Cyton

  2. Muscles

  3. Bones

  4. Connective tissue

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Correct Option: A

Function of nerves tissue is?

zoology tissue level of organisation neural tissue structure of neuron nervous tissues

  1. Excitability

  2. Sensitivity

  3. Elasticity

  4. Contraction

Show answer
Correct Option: A
Explanation:

  • Nervous tissues are the class of specialized tissues majorly found in the central and peripheral nervous system. 
  • These tissues are made up of neurons and their supporting cells called neuroglia. 
  • These tissues are responsible for the control and coordination throughout the body. 
  • The nervous tissues or neurons are excitable cells that work on the basis of action potentials.

So, the correct answer is 'Excitability'.

Which of the following is an incorrect match of cell junction along with its structure and function?

zoology tissue level of organisation muscle tissue structure of protein muscle tissues

  1. Cell junction - Tight junctions,
    Structure - Tightly bound, leak proof, fibrous protein 'belt' that surrounds cells ,
    Functions - Organizing junction : hold cells together such that material passes through but not between the cells.

  2. Cell junction - Desmosomes
    Structure - Intermediate filaments linked to adjoining cells through cadherins cytoskeleton.
    Functions - Anchoring junction : "buttons" cells together.

  3. Cell junction - Plasmodesmata
    Structure - Six transmembrane connexon proteins creating a "pipe" that connects cells
    Function - Communicating junctions : allow passage of small molecules from cell to cell in a tissue.

  4. Cell junction - Adherens junctions
    Structure - Transmembrane fibrous proteins.
    Functions - Anchoring junction : "roots" extra-cellular matrix to cytoskeleton.

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Correct Option: C

Which is true of contractile tissue of sphincter?
$1.$ Mesodermal
$2$. Contain stretch receptors
$3$. Rhythmicity
$4$. Indefatigible.

zoology tissue level of organisation muscle tissue structure of protein muscle tissues

  1. All the four

  2. Only $1, 2$ and $3$

  3. Only $1, 2$ and $4$

  4. Only $1, 3$ and $4$

Show answer
Correct Option: B

A human cell which contains a large amount of RER, many golgi bodies and a prominent nucleolus is most likely a

zoology tissue level of organisation muscle tissue structure of protein muscle tissues

  1. Muscle cell

  2. Secretory cell

  3. Nerve cell

  4. RBC

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Correct Option: A

What is sarcomere ?

zoology tissue level of organisation muscle tissue structure of protein muscle tissues

  1. Part between two H-lines

  2. Part between two A-lines

  3. Part between two I-bands

  4. Part between two Z-lines

Show answer
Correct Option: D
Explanation:
The sarcomeres are fibrous protein filaments that slide past one another when the muscle contracts or relaxes. It is basically the region between two Z-bands.
So, the correct answer is 'Part between two Z-lines'.
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