Tag: muscle tissue

Questions Related to muscle tissue

Which of the following muscle fibres do not show striation and taper at both ends?

biology animal tissue muscle tissue structure of protein muscle tissues

  1. Cardiac muscle fibres

  2. Smooth muscle fibres

  3. Skeletal muscle fibres

  4. Voluntary muscle fibres

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Correct Option: A

Choose the correct answer from the alternatives given.
Which of the following tissues is most affected due to the deficiency of oxygen? 

biology animal tissue muscle tissue structure of protein muscle tissues

  1. Cardiac muscles

  2. Visceral muscles

  3. Hyaline cartilage

  4. Long bones

Show answer
Correct Option: A
Explanation:

When oxygen demand increases, heart rate and cardiac output increase, which increases the flow of blood through the lung and the pressure required to force blood through the arterioles and capillaries of the lung. Due to this, the cardiac muscles are most affected due to deficiency of oxygen. So, the correct option is 'Cardiac muscles'.

One amongst the following is not a property of cardiac muscle fibres

biology animal tissue muscle tissue structure of protein muscle tissues

  1. Their T- tubules occur at the level of Z - discs

  2. They are innervated by branches from cranial and spinal nerves

  3. Striated in appearance

  4. Their refractory period is longest

Show answer
Correct Option: A
Explanation:
Cardiac muscle fibres are involuntary and striated in appearance, which is present in the heart. The main characteristic of this is they initiate their rhythmic impulses. Their refractory period is the longest. This type of muscle fibres is innervated by branches from cranial and spinal nerves. Skeletal muscle contains Z-discs to connect the one muscle fibre from another muscle fibres. But cardiac muscle fibres do not contain Z-disc
Thus, the correct answer is 'Their T- tubules occur at the level of Z - discs.'

Which muscles having functionally multinucleated conditions?

biology animal tissue muscle tissue structure of protein muscle tissues

  1. Cardiac muscle

  2. Smooth muscle

  3. Voluntary muscle

  4. All of these

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Correct Option: A
Explanation:

Skeletal muscle cells are multinucleated from the fusion of muscle cells. Smooth muscle cells are strictly mononucleated, and cardiac muscle cells are mononucleated in humans. However, cardiac muscle cells are functionally syncytium. They have their cells interconnected with gap junctions, which allow rapid co-ordinated contraction of the muscle cells. The cells, however, are not multinucleated and are not true syncytium (as seen in case of skeletal muscle) but functionally they are syncytium (multinucleated). Therefore, cardiac muscle is functionally multinucleated and skeletal (voluntary) muscle are true multinucleated. So, the correct option is 'Cardiac muscle'.

Skeletal muscles are controlled by?

biology animal tissue muscle tissue structure of protein muscle tissues

  1. Sympathetic nervous system

  2. Parasympathetic nervous system

  3. Somatic nervous system

  4. Sympathetic and parasympathetic both

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Correct Option: C
Explanation:
  • The somatic nervous system is the part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles. The somatic nervous system consists of afferent nerves or sensory nerves, and efferent nerves or motor nerves.
  • Skeletal muscle is a form of striated muscle tissue, which is under the voluntary control of the somatic nervous system. 
  • Hence Skeletal muscles are controlled by Somatic nervous system.
  • So, the correct answer is 'Somatic nervous system'.

The type of muscle fibre present in the wall of alimentary canal is 

biology animal tissue muscle tissue structure of protein muscle tissues

  1. smooth muscle fibre

  2. striped muscle fibre

  3. cardiac muscle fibre

  4. both (a) and (b)

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Correct Option: A
Explanation:
The wall of the gut or the alimentary canal is made up of smooth muscle fibres. The presence of these muscles makes it an involuntary organ.
So, the correct answer is 'smooth muscle fibre'.

Which of the following statements is incorrect ?

biology animal tissue muscle tissue structure of protein muscle tissues

  1. Smooth muscles are ,found in urinary bladder, alimentary canal and genital

  2. A striated muscle Is a syncylium Le., a multinudeate structure

  3. The cytoplasm of striated muscle is called endoplasm

  4. The plasma membrane and ER of striated muscles are called sarcolemma and sarcoplasmic reticulum respectively

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Correct Option: A
Explanation:
Smooth muscles are found in the urinary bladder, alimentary canal, and genitals. They are involuntary muscles and have a major role in the transport of substances.
So, the correct answer is ' Smooth muscles are found in urinary bladder, alimentary canal and genital'.

Largest smooth muscle is present in _____________.

biology animal tissue muscle tissue structure of protein muscle tissues

  1. Leg

  2. Thigh

  3. Uterus of pregnant woman

  4. Urethra

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Correct Option: C

Which one of the following is correct pairing of a body part and like kind of muscle tissue that moves it ?

biology animal tissue muscle tissue structure of protein muscle tissues

  1. Iris Involuntary smooth muscle

  2. Heart wall Involuntary unstriated muscle

  3. Biceps of upper arm smooth muscle fibers

  4. Abdominal wall smooth muscle

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Correct Option: A

Select the correct option:

Which one of the following is correct pairing of a body part with the kind of muscle tissue present in it?

biology animal tissue muscle tissue structure of protein muscle tissues

  1. Biceps of upper arm- Smooth muscle fibres

  2. Abdominal wall- Voluntary smooth muscle

  3. Iris- Involuntary smooth muscle

  4. Heart wall- Involuntary unstriated muscle

Show answer
Correct Option: C
Explanation:

Involuntary smooth muscles are those muscles that are not under the control of our will and are without any striations (stripes). Iris has involuntary smooth muscle. Biceps of upper arm have  striated muscle fibres and abdominal wall has involuntary smooth muscles. Heart wall has involuntary striated muscle.