Biology · General Awareness

Muscle Biology

798 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

Body stiffening after death is due to

  1. muscle tension

  2. treppe

  3. muscle twitch

  4. muscle tonus

  5. rigor mortis
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

It is the stiffening of the body after death. It is caused by non-separation of actin myosin complex due to the non-availability of ATP/CTP.

Multiple choice

Hands and legs have

  1. involuntary muscles

  2. voluntary muscles

  3. Both A & b

  4. None of theses
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Voluntary muscles are those that are under conscious control, such as the skeletal muscles in our arms and legs. Involuntary muscles, like those in the heart or stomach, function automatically.

Multiple choice

Cardiac muscle fibres are different from skeletal muscles because these are :

  1. striated, involuntary

  2. non-striated,voluntary

  3. non-striated involuntary

  4. antagonistic
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cardiac muscles from the walls of heart. These are intermediate in structure being striated and involuntary. It is meant for automatic and rhythmic contraction. On the other hand skeletal muscles are striated and voluntary, they are most abundant and found attached to skeleton. They are supplied by somatic nerve and hence are under voluntary control.The smooth muscles are non-striated and involuntary. They often encircle or surround viscera. They are supplied by autonomic nervous system. 

Multiple choice

Which of the following does not match?

  1. Muscular movement - ATP

  2. Heart - pace-maker

  3. Monocyte - haemoglobin

  4. Nerve impulse - acetylcholine
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Monocyte is the largest white blood cells (WBCs) whereas heamoglobin is found in RBCs. Thus monocyte is not correctly matched with haemoglobin. 

Multiple choice

Bundle of His is a network of :

  1. Muscular fibre throughout the heart

  2. Muscular fibre throughout the wall of ventricle

  3. Nerve fibre throughout the heart

  4. Nerve fibre throughout the wall of ventricle
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is the bundle of cardiac muscle fibers that passes from the atrioventricular node to the interventricular septum and then the ventricles. It conducts the electrical impulses that regulate the heartbeat from the right atrium to the left and right ventricles.