Tag: muscle tissue

Questions Related to muscle tissue

Contractile proteins are found in_________________.

biology animal tissue muscle tissue structure of protein muscle tissues

  1. Bones

  2. Blood

  3. Muscles

  4. Cartilage

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Correct Option: C
Explanation:

From all the above options, only muscle has a property of contraction. Muscle possess contractile proteins named, acitn and myosin on myofibrils. Hence, option C is correct. 

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.

Show answer
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 $4$

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Correct Option: B

Muscles of iris and ciliary body originate from

zoology embryonic development in human muscle tissue structure of protein muscle tissues

  1. Ectodoerm

  2. Mesoderm

  3. Endoderm

  4. All of the above

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Correct Option: B
Explanation:

Muscles of iris and ciliary body are "smooth muscles". Smooth muscle cells arise from undifferentiated mesenchymal cells (embryonic mesoderm). These cells differentiate first into mitotically active cells, myoblasts, which contain a few myofilaments. Myoblasts give rise to the cells which will differentiate into mature smooth muscle cells. Iris is derived from neuroectoderm but the muscles of iris is derived from mesoderm. Thus, the correct option is B.

Sarcosome is a term used for

biology multicellular structure: tissue muscle tissue structure of protein muscle tissues

  1. Mitochondria

  2. Golgi bodies

  3. Ribosomes

  4. Plastids

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Correct Option: A
Explanation:

Since the 1850s cytologists observed some granular structures in the cytoplasm of the living cells. These structures were originally named as sarcomas. The term mitochondrion was introduced by Carl Benda in 1898. The term mitochondrion became the widely used name for this organelle but still the term sarcosome is accepted to denote this organelle present in the muscle. Sarcosome is a large specialized mitochondrion found in a striated muscle fiber.
Thus, the correct answer is the option (A), 'Mitochondria'.

Involuntary muscle fibres are unique of

biology multicellular structure: tissue muscle tissue structure of protein muscle tissues

  1. Diaphragm; eye muscles; intercostal muscle

  2. Urinary bladder; blood vessels

  3. Both A and B

  4. None of the above

Show answer
Correct Option: C
Explanation:

Involuntary muscles are those, which are not under our control. Diaphragm muscles are internal muscle, that divides the thorax and the abdomen and are involuntary. The walls of large organs like stomach, intestines, uterus and urinary bladder are involuntary.
Thus, the correct answer is option (C), 'Both (A) and (B)'.

Their contraction is involuntary, vigorous and rhythmic holds true for

biology multicellular structure: tissue muscle tissue structure of protein muscle tissues

  1. Striated muscles

  2. Cardiac muscles

  3. Unstriated muscles

  4. None of the above

Show answer
Correct Option: B
Explanation:

Cardiac muscles are the muscles of the heart. They are self-contracting, autonomically regulated (meaning involuntary and must continue to contract in a rhythmic fashion for the whole life of the organism.
Thus, the correct answer is option (B), 'Cardiac muscles'.

Which one of these muscles tires out easily?

biology multicellular structure: tissue muscle tissue structure of protein muscle tissues

  1. Cardiac

  2. Unstriated

  3. Striated

  4. All of the above

Show answer
Correct Option: C
Explanation:

Skeletal muscle fiber or striated muscles are characterized as fast or slow based on their activity patterns. Fast, also called white muscle fibers, contract rapidly, have poor blood supply, operate without oxygen and tire quickly.
Thus, the correct answer is option (C), 'Striated'.

High contents of myoglobin and cytochromes are present in

biology multicellular structure: tissue muscle tissue structure of protein muscle tissues

  1. Red muscles

  2. White muscles

  3. Intermediate muscles

  4. None of the above

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Correct Option: A
Explanation:

Red muscle gives a fused contraction at a slower frequency of stimulation. The red color of muscles is due partly to myoglobin, which is probably freely dissolved in the sarcoplasm and partly to the cytochrome, which are mainly associated with the particulate components of the cytoplasm.
Thus, the correct answer is option (A), 'Red muscles'.

Unstriped muscle are also known as

biology multicellular structure: tissue muscle tissue structure of protein muscle tissues

  1. Visceral

  2. Smooth

  3. Involuntary

  4. All of the above

Show answer
Correct Option: D
Explanation:

Non-striated muscles are called as smooth muscles. Their activities are not under the voluntary control of the nervous system and are therefore known as involuntary muscles. They are called as visceral muscles because they line the blood vessels, stomach, digestive tract and other internal organs. So, the correct answer is option D.