Biology ยท General Awareness

Muscle Biology

836 Questions

Muscle biology covers the structures, functions, and contraction mechanisms of skeletal, cardiac, and smooth muscles. Test questions target filaments, stimuli, and specific muscle roles. A clear understanding helps secure marks in biology sections.

Skeletal muscle controlCardiac muscle propertiesMuscle contraction mechanismActin and myosin filamentsMuscle functions

Muscle Biology Questions

Multiple choice

Which of the following muscular tissues have spindle-shaped cells?

  1. Skeletal muscles

  2. Smooth muscles

  3. Cardiac muscles

  4. Striated muscles

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The correct answer is smooth muscles. Muscle tissue contracts without conscious control, having the form of thin layers or sheets made up of spindle-shaped, unstriated cells with single nuclei, and found in the walls of the internal organs, such as the stomach, intestine, bladder, and blood vessels, excluding the heart.

Multiple choice

Which of the following statements is true?

  1. Nodes of Ranvier occur in non-myelinated nerve fibre.

  2. Hyaline cartilage stores fat.

  3. Collagen is associated with clotting of blood.

  4. Single unit smooth muscle contracts rhythmically.

  5. Ligament connects bone with muscle.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Single unit smooth muscle contracts rhythmically. This statement is correct.

Multiple choice

Which of the following pairs does not match?

  1. Muscular movement - ATP

  2. Heart - pacemaker

  3. Monocyte - haemoglobin

  4. Nerve impulse - acetylcholine

  5. -
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Monocyte is a large phagocytic white blood cell with a simple oval nucleus and clear, greyish cytoplasm. It is not concerned with haemoglobin.

Multiple choice

Largest smooth muscle is present in

  1. leg

  2. thigh

  3. uterus of a pregnant woman

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

Smooth muscles make up the walls of the intestine, uterus, blood vessels and internal muscles of the eye. Largest smooth muscle is present in the uterus of pregnant women.

Multiple choice

Alary muscle is associated with

  1. heart and circulation

  2. malpighian tubules and excretion

  3. trachea and respiration

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

The alary muscles, so named because of their general wing or delta shape in many insects, lie immediately on top of the dorsal diaphragm. Each chamber has a pair of alary muscles which expand and contract to facilitate the flow of haemolymph through the heart.

Multiple choice

Why does heavy exercise cause muscle cramps?

  1. Due to the formation of lactic acid

  2. Due to the evolution of high concentration of CO2

  3. Due to the formation of ethanol

  4. Due to complete absence of oxygen in muscles
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Heavy exercise causes muscle cramps due to the formation of lactic acid.

Multiple choice

Involuntary muscles are

  1. cardiac muscles

  2. smooth muscles

  3. cardiac muscles and smooth muscles

  4. cardiac muscles and striated muscles
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

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