Muscles

Muscles MDCAT MCQs with answers

23 past paper MCQs on Muscles, from the Support and Movement unit of MDCAT Biology. The year each question appeared is shown where known; tap “Show answer” for the correct option and a short solution.

Read the notes first Practise the unit as a quiz

1.Irregular striations and involuntary control are related to: (MDCAT 2023)

  1. cardiac muscle cells
  2. fibroelastic cartilage cells
  3. skeletal muscle cells
  4. smooth muscle cells
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Correct answer: (a) cardiac muscle cells

Cardiac muscle is striated like skeletal muscle but works without the will, and its striations are less regular.

2.Which feature is possessed by smooth muscles? (MDCAT 2024)

  1. voluntary control
  2. branched fibres
  3. uninucleate cells
  4. striated appearance
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Correct answer: (c) uninucleate cells

A smooth muscle cell is spindle shaped with one central nucleus and no striations.

3.Which is the common feature between cardiac and smooth muscles? (UHS MDCAT 2025)

  1. Voluntary
  2. Involuntary
  3. Branched
  4. Unbranched
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Correct answer: (b) Involuntary

Cardiac and smooth muscle are both involuntary; only cardiac muscle is branched.

4.Which of the following characters is shared by both skeletal and cardiac muscles? (UHS MDCAT 2025)

  1. Presence of Striation
  2. Involuntary control
  3. Multinucleated fibers
  4. Intercalated discs
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Correct answer: (a) Presence of Striation

Both are striated; only cardiac muscle is involuntary and has intercalated discs.

5.Which of the following muscle types are involuntary in action? (UHS MDCAT 2025)

  1. Skeletal and smooth
  2. Skeletal and cardiac
  3. Cardiac and smooth
  4. Smooth muscle only
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Correct answer: (c) Cardiac and smooth

Cardiac and smooth muscle both work without conscious control.

6.In which of the following combinations, both components have non-striated muscle fibers? (UHS MDCAT 2025)

  1. Intestine & biceps
  2. Intestine & blood vessels
  3. Heart & lungs
  4. Stomach & heart
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Correct answer: (b) Intestine & blood vessels

Smooth, unstriated fibres line the gut and the walls of the blood vessels.

7.Which muscle type is under conscious control and is multinucleated? (KMU MDCAT 2025)

  1. Smooth muscle
  2. Skeletal muscle
  3. Cardiac muscle
  4. Ciliary muscle
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Correct answer: (b) Skeletal muscle

Skeletal muscle alone is both voluntary and multinucleated.

8.Activity of which organ would be compromised with impaired function of smooth muscles? (NUMS MDCAT 2025)

  1. Heart
  2. Lungs
  3. Stomach
  4. Tongue
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Correct answer: (c) Stomach

The wall of the stomach is smooth muscle, and its churning depends on it.

9.Cardiac muscles are different from skeletal muscles because they: (SZABMU MDCAT 2025)

  1. Lack striations
  2. Are voluntary and multinucleated
  3. Are involuntary and multinucleated
  4. Are striated but involuntary
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Correct answer: (d) Are striated but involuntary

Cardiac muscle is striated like skeletal muscle but works without conscious control.

10.Which of the following does NOT relate to smooth muscles? (KMU MDCAT 2024)

  1. Controlled by the autonomic nervous system
  2. Have spindle shaped cells
  3. Line the wall of heart
  4. Lack striations
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Correct answer: (c) Line the wall of heart

The heart wall is cardiac muscle, which is striated; smooth muscle lines the gut and vessels.

11.Which feature is absent from cardiac muscles? (NUMS MDCAT 2023)

  1. Intercalated disc
  2. Multinucleate cells
  3. Light and dark bands
  4. Contractile sarcomeres
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Correct answer: (b) Multinucleate cells

Cardiac muscle cells have a single nucleus each; it is skeletal muscle that is multinucleate.

12.Smooth muscles are found in all mentioned below except (UHS MDCAT 2023)

  1. Trachea
  2. Bronchi
  3. Bronchioles
  4. Alveoli
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Correct answer: (d) Alveoli

The alveolar wall is a single layer of flat cells with no muscle in it.

13.Irregular striations and involuntary control is related to? (UHS MDCAT 2023)

  1. Cardiac muscle cells
  2. Fibroelastic cartilage cell
  3. Skeletal muscle cells
  4. Smooth muscle cells
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Correct answer: (a) Cardiac muscle cells

Cardiac muscle is faintly striated and beats without conscious control.

14.Tricep muscles are: (PMC MDCAT 2022)

  1. Flexor muscles
  2. Extensor muscles
  3. Adductor muscles
  4. Abductor muscles
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Correct answer: (b) Extensor muscles

The triceps straightens the elbow, so it is an extensor.

15.Bicep muscles are: (PMC MDCAT 2022)

  1. Flexor muscles
  2. Extensor muscles
  3. Adductor muscles
  4. Abductor muscles
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Correct answer: (a) Flexor muscles

The biceps bends the elbow, so it is a flexor.

16.Which of the following muscles are controlled by somatic nervous system: (PMC MDCAT 2022)

  1. heart muscles
  2. Skeletal muscles
  3. Involuntary muscles
  4. Smooth muscles
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Correct answer: (b) Skeletal muscles

The somatic nervous system serves the skeletal muscles, which we control at will.

17.Which is incorrect for cardiac muscles? (PMC MDCAT 2022)

  1. Show involuntary control
  2. Branched cells
  3. Have no striations
  4. Have intercalated disc
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Correct answer: (c) Have no striations

Cardiac muscle is striated, though less regularly than skeletal muscle.

18.Cardiac muscles are the muscles of: (PMC MDCAT 2022)

  1. Aorta
  2. Comary vein
  3. Heart
  4. Liver
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Correct answer: (c) Heart

Cardiac muscle is found only in the wall of the heart.

19.Which one of the following is the character of Cardiac Muscles? (PMC MDCAT 2022)

  1. Made up of unstrained and branched cells
  2. Voluntary in action
  3. Self excitatory or myogenic
  4. Striated and unbranched
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Correct answer: (c) Self excitatory or myogenic

Cardiac muscle sets its own rhythm, so its beat is myogenic.

20.Cardiac tissue is made up of : (PMC MDCAT 2022)

  1. Cardiac muscle
  2. Smooth muscles
  3. Skeletal muscles
  4. Gut muscles
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Correct answer: (a) Cardiac muscle

The wall of the heart is cardiac muscle and nothing else.

21.Smooth muscles are long and spindle-shaped with nucleus ---- per cell: (NUMS MDCAT 2022)

  1. One
  2. Two
  3. Three
  4. Many
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Correct answer: (a) One

A smooth muscle cell is spindle shaped with one central nucleus.

22.Which one of the following are “myogenic” type of muscles? (PMC MDCAT 2020)

  1. Glandular muscles
  2. Cardiac muscles
  3. Skeletal muscles
  4. Smooth muscles
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Correct answer: (b) Cardiac muscles

Cardiac muscle sets its own rhythm, so its contraction is myogenic.

23.Which one of the following muscles are considered as “Voluntary muscles”? (PMC MDCAT 2020)

  1. Smooth muscles
  2. Cardiac muscles
  3. Skeletal muscles
  4. Glandular muscles
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Correct answer: (c) Skeletal muscles

Skeletal muscle alone is under conscious control.

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