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 1 of 3
- A. Cardiac muscle
- B. Skeletal muscle
- C. Smooth muscle
- D. None of the three
Explanation: Cardiac muscle has the cross striations of skeletal muscle because it uses the same actin and myosin arrangement, but it contracts…
Correct answer: Cardiac muscle- A. Voluntary
- B. Involuntary
- C. Branched
- D. Unbranched
Explanation: Both contract without conscious control, cardiac muscle beating rhythmically on its own and smooth muscle working the gut, blood vessels…
Correct answer: Involuntary- A. Presence of striation
- B. Involuntary control
- C. Multinucleated fibers
- D. Intercalated discs
Explanation: Both use the same regular arrangement of actin and myosin filaments, so both show cross striations under the microscope.
Correct answer: Presence of striation- A. Skeletal and smooth
- B. Skeletal and cardiac
- C. Cardiac and smooth
- D. Smooth muscle only
Explanation: Cardiac muscle beats rhythmically without conscious control and smooth muscle works the gut, blood vessels and other hollow organs…
Correct answer: Cardiac and smooth- A. Intestine & biceps
- B. Intestine & blood vessels
- C. Heart & lungs
- D. Stomach & heart
Explanation: The walls of the intestine and of blood vessels both contain smooth muscle, which has no striations and works involuntarily.
Correct answer: Intestine & blood vessels- A. 206
- B. 300
- C. 650
- D. 703
Explanation: The human body has about 600 to 650 skeletal muscles, so 650 is the accepted approximate figure.
Correct answer: 650- A. Skeletal Muscles
- B. Smooth Muscles
- C. Cardiac Muscles
- D. All of these
Explanation: Skeletal muscles are the most numerous and make up most of the muscle mass involved in voluntary movement and posture.
Correct answer: Skeletal Muscles- A. Strength
- B. Flexibility
- C. Normal physical endurance
- D. Agility
Explanation: Cardiorespiratory capacity measures how effectively the heart, lungs and blood supply oxygen during sustained activity, so it is most…
Correct answer: Normal physical endurance- A. Bony fish
- B. Cartilaginous fish.
- C. Fish like mammals.
- D. All fishes.Primary & Secondary Schooling (K-12)
Explanation: S-band or lateral undulatory locomotion is characteristically associated with cartilaginous fish, whose flexible bodies and fins produce…
Correct answer: Cartilaginous fish.- A. Plantigrade
- B. Digitigrade
- C. Unguligrade
- D. Hopping
Explanation: Unguligrade animals walk on the tips of their digits, often enclosed in hooves, which lengthens the effective limb and permits the…
Correct answer: Unguligrade- A. Cockroach
- B. Snail
- C. Earthworm
- D. Star fish
Explanation: An earthworm moves by alternating circular and longitudinal muscle contractions while its setae anchor parts of the body to the soil.
Correct answer: Earthworm- A. Ulna
- B. Radius
- C. Olecronon process of ulna.
- D. Scapula
Explanation: The biceps brachii inserts mainly on the radial tuberosity and therefore attaches to the radius.
Correct answer: Radius- A. Bracheoradialis
- B. Brachialis.
- C. Intercostals
- D. Triceps
Explanation: The triceps brachii opposes the biceps brachii: biceps flexes the elbow whereas triceps extends it.
Correct answer: Triceps- A. They are multinucleated.
- B. They are 10 - 100 ?m in diameter & surrounded by sarcolemma
- C. They contain O2 storing molecules called hemoglobin.
- D. Their cytoplasm contains high concentration of carbohydrates
Explanation: Skeletal muscle fibres contain myoglobin, an oxygen-storing pigment, rather than haemoglobin, which is the oxygen-carrying protein in red…
Correct answer: They contain O2 storing molecules called hemoglobin.- A. They appear darker than smooth muscles by naked eye.
- B. Alternating dark and light bands appear on their surface when visualized by naked eye.
- C. Alternating dark and light bands appear on their surface when visualized via a microscope.
- D. All of these
Explanation: Skeletal muscle is called striated because microscopic examination shows repeating alternating dark A bands and light I bands.
Correct answer: Alternating dark and light bands appear on their surface when visualized via a microscope.- A. A smooth muscle
- B. A cardiac muscle
- C. A skeletal muscle.
- D. All of these
Explanation: Smooth muscle contraction is regulated involuntarily by autonomic signals, local factors, and hormones, rather than by conscious motor…
Correct answer: A smooth muscle- A. Striations and branched fibres
- B. Striations and unbranched fibres
- C. Multiple nuclei and unbranched fibres
- D. Multiple nuclei and branched fibres
Explanation: The correct answer is Option A: 'striations and branched fibres.' Cardiac muscle tissue is distinct for its striated appearance and…
Correct answer: Striations and branched fibres- A. Skin
- B. Heart
- C. Forelimb
- D. Urinary bladder
Explanation: The correct answer is the urinary bladder. Smooth muscle is found in the walls of hollow organs such as the urinary bladder, where it…
Correct answer: Urinary bladder- A. Snail
- B. Starfish
- C. Jellyfish
- D. Earthworm
Explanation: Jellyfish are known for using jet propulsion to move. They contract their bell-shaped body, expelling water to push themselves forward.
Correct answer: Jellyfish- A. Irregularly striped and spindle shaped with one nucleus per cell
- B. Unstriped and spindle shaped with one nucleus per cell
- C. Unstriped, branched and voluntary in action
- D. Striped, cylindrical and voluntary in action
Explanation: The correct answer is Option B: 'Unstriped and spindle shaped with one nucleus per cell.' This describes the smooth muscle tissue that is…
Correct answer: Unstriped and spindle shaped with one nucleus per cellMuscles MCQs: common questions
Are these Muscles MCQs free?
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