Tag: muscle tissue

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Questions Related to muscle tissue

Multiple choice biology animal tissue muscle tissue structure of protein muscle tissues

Contractile proteins are found in_________________.

  1. Bones

  2. Blood

  3. Muscles

  4. Cartilage
Reveal answer Fill a bubble to check yourself
C Correct answer
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. 

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 embryonic development in human muscle tissue structure of protein muscle tissues

Muscles of iris and ciliary body originate from

  1. Ectodoerm

  2. Mesoderm

  3. Endoderm

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Sarcosome is a term used for

  1. Mitochondria

  2. Golgi bodies

  3. Ribosomes

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

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

Involuntary muscle fibres are unique of

  1. Diaphragm; eye muscles; intercostal muscle

  2. Urinary bladder; blood vessels

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
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)'.

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

Their contraction is involuntary, vigorous and rhythmic holds true for

  1. Striated muscles

  2. Cardiac muscles

  3. Unstriated muscles

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

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

Which one of these muscles tires out easily?

  1. Cardiac

  2. Unstriated

  3. Striated

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

High contents of myoglobin and cytochromes are present in

  1. Red muscles

  2. White muscles

  3. Intermediate muscles

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

Unstriped muscle are also known as

  1. Visceral

  2. Smooth

  3. Involuntary

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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.