Tag: tissue level of organisation

Quizzes (7) Questions (14)

Questions Related to tissue level of organisation

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

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.

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

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

  3. (a), (b)

  4. (e) only
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Birds are characterized by pneumatic (hollow) bones, lungs with air sacs for efficient respiration, four-chambered hearts, homeothermy (warm-bloodedness), feathers, and a crop/gizzard for digestion. Scales are generally found on the legs of birds, but are not exclusive to them (reptiles also have scales).

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

The direction of impulse in a typical neuron is

  1. Axon to dendron

  2. Dendron to axon

  3. Both A and B

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
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'. 

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

Function of nerves tissue is?

  1. Excitability

  2. Sensitivity

  3. Elasticity

  4. Contraction
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

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

  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.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plasmodesmata are channels that traverse the cell walls of plant cells and some algal cells, allowing transport and communication between them. They are not made of connexon proteins; connexons are found in gap junctions in animal cells.

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

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

  1. All the four
  2. Only $1, 2$ and $3$
  3. Only $1, 2$ and $4$
  4. Only $1, 3$ and $4$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sphincter muscles are typically smooth muscles (mesodermal), contain stretch receptors to regulate tone, and exhibit rhythmicity in some cases (like the pyloric sphincter). They are generally not indefatigable; like other muscles, they can fatigue.

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

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

  1. Muscle cell

  2. Secretory cell

  3. Nerve cell

  4. RBC
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A cell with abundant rough endoplasmic reticulum, numerous golgi bodies, and a prominent nucleolus is heavily involved in protein synthesis and secretion, making it a secretory cell.

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

What is sarcomere ?

  1. Part between two H-lines

  2. Part between two A-lines

  3. Part between two I-bands

  4. Part between two Z-lines
Reveal answer Fill a bubble to check yourself
D Correct answer
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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