Free Muscles MCQs with Answers
50 Muscles MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Muscles covers skeletal, smooth and cardiac muscle, their microscopic structure and the roles of tendons, myofibrils, actin and myosin. It explains the sliding filament mechanism, sarcomere shortening, neuromuscular transmission and calcium regulation, while distinguishing voluntary skeletal movement from involuntary contraction in smooth and cardiac muscle.
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50 questions · page 2 of 3
- A. Blood
- B. Liver
- C. Spleen
- D. Muscles
Explanation: Myoglobin is an oxygen binding protein present in all muscle fibers. It is an iron-containing protein similar to haemoglobin and gives the…
Correct answer: Muscles- A. at the back of the upper part of the leg
- B. at the front of the upper part of the leg
- C. at the back of the lower part of the leg
- D. at the front of the lower part of the leg
Explanation: The hamstring muscles are actually located at the back of the thigh, not the front of the lower leg.
Correct answer: at the front of the lower part of the leg- A. Option A
- B. Option B
- C. Option C
- D. Both A and B
- E. Both A and C
Explanation: Smooth muscles are present in the walls of internal organs such as the stomach, intestine, bladder, etc.
Correct answer: Option A- A. Smooth muscles
- B. Cardiac muscles
- C. Skeletal muscles
- D. All of these
Explanation: The floor of the chest is called diaphragm which is a sheet of skeletal muscles.
Correct answer: Skeletal muscles- A. Sarcolemma
- B. Sarcoplasmic reticulum
- C. Sarcomere
- D. Myofilament
Explanation: The correct answer is the sarcolemma, which is the modified cell membrane surrounding each muscle fiber.
Correct answer: Sarcolemma- A. Cylindrical, multinucleate
- B. Spindle shaped, uninucleate, involuntary
- C. Branched, striated
- D. Striated, multinucleate
Explanation: Smooth muscles are spindle-shaped, non-striated, involuntary with single nucleus.
Correct answer: Spindle shaped, uninucleate, involuntary- A. Smooth muscles
- B. Cardiac muscles
- C. Skeletal muscles
- D. Glandular muscles
Explanation: Muscles in the body are categorized into three main types: Smooth, Cardiac, and Skeletal.
Correct answer: Skeletal muscles- A. It is an extensor muscle
- B. Its insertion is on tibia
- C. Originate from pelvic girdle and top of femur
- D. Originate from ilium and femur
Explanation: The hamstring muscles are a group of three muscles located at the back of the thigh.
Correct answer: Originate from pelvic girdle and top of femur- A. Muscle Fatigue
- B. Tetany
- C. Cramps
- D. Oxygen debt in muscles
Explanation: Muscle Fatigue: This option is the correct answer. The condition described, where lactic acid builds up in thigh muscles, causing…
Correct answer: Muscle Fatigue- A. Flexor muscles
- B. Extensor muscles
- C. Adductor muscles
- D. Abductor muscles
Explanation: The adductors, as a group, are responsible for bringing the legs inwards towards each other (adduction) when the leg is extended and…
Correct answer: Adductor muscles- A. Tendon
- B. Ligament
- C. Reticular tissue
- D. Cartilage
Explanation: Option (a) is correct. Tendons are fibrous connective tissues that attach muscles to bones.
Correct answer: Tendon- A. 2
- B. 4
- C. 6
- D. 8
Explanation: In a muscle sarcomere, each myosin filament (thick filament) is surrounded by 6 actin filaments (thin filaments) at each end.
Correct answer: 6- A. They are multinucleated
- B. They are 1-1 nm in diameter and surrounded by sarcolemma
- C. They contain O2 storing molecules called myoglobin
- D. Their cytoplasm contains a high concentration of carbohydrates
Explanation: Skeletal muscle fibres are not 1-1 nm in diameter. They are 10-100 micrometers in diameter and are surrounded by sarcolemma.
Correct answer: They are 1-1 nm in diameter and surrounded by sarcolemma- A. Motor system
- B. Motor unit
- C. Motor set
- D. Fascicle
- E. None of the above
Explanation: Explanation for this question will be added soon.
Correct answer: Motor unit- A. Bundle of connective tissue
- B. Bundle of myofibrils
- C. Bundle of muscle fibers
- D. Muscle cells
Explanation: A muscle fascicle is a bundle of skeletal muscle fibres surrounded by perimysium, a type of connective tissue.
Correct answer: Bundle of muscle fibers- A. Smooth muscle
- B. Cardiac muscle
- C. Skeletal muscle
- D. Visceral muscle
Explanation: Refer to the following table from Punjab Board Textbook.
Correct answer: Smooth muscle- A. Ligaments
- B. Cartilage
- C. Membranes
- D. Tendons
Explanation: A tendon is a fibrous connective tissue which attach bones to muscles.
Correct answer: Tendons- A. One
- B. Two
- C. Three
- D. Many....
Explanation: Smooth muscle cells are spindle shaped, have a single, centrally located nucleus, and lack striations. They are called involuntary muscles.
Correct answer: One- A. Intercalated disc
- B. Multinucleate cells
- C. Light and dark bands
- D. Contractile sarcomere
Explanation: Cardiac muscle: It is a contractile tissue present in the heart. The muscle fibres are cylindrical, branched and uninucleate.
Correct answer: Multinucleate cells- A. Muscle fibrin
- B. Muscle fibers
- C. Sarcomere
- D. None of these
Explanation: Muscle contraction occurs when sarcomeres within muscle fibers shorten.
Correct answer: Muscle fibers