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Locomotion and Movement — NEET Biology MCQs with Solutions
Free NEET Biology Locomotion and Movement MCQs with step-by-step solutions covering Types of Movement & Muscle, Skeletal Muscle Structure, Mechanism of Muscle Contraction, Skeletal System, Joints & Disorders. Practise online on Prepizo — no login needed.
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Sample questions with solutions
Q1 — Types of Movement & Muscle · easy · theory
The muscle type that is voluntary, striated and attached to bones is:
A. Cardiac muscle
B. Smooth muscle
C. Involuntary muscle
D. Skeletal muscle ✓ Correct
Solution: Skeletal (striated) muscle is voluntary and moves the bones of the skeleton.
Q2 — Types of Movement & Muscle · easy · theory
The muscle found in the wall of the heart, which is striated but involuntary, is:
A. Smooth muscle
B. Visceral muscle
C. Cardiac muscle ✓ Correct
D. Skeletal muscle
Solution: Cardiac muscle is striated yet involuntary and does not fatigue.
Q3 — Skeletal Muscle Structure · easy · theory
The functional (contractile) unit of a skeletal muscle fibre is the:
A. Sarcomere ✓ Correct
B. Myoglobin
C. Sarcolemma
D. Sarcoplasm
Solution: The sarcomere (between two Z lines) is the repeating contractile unit of the myofibril.
Q4 — Skeletal Muscle Structure · easy · theory
The thick filaments of a myofibril are made mainly of the protein:
A. Troponin
B. Actin
C. Tropomyosin
D. Myosin ✓ Correct
Solution: Thick filaments are myosin; thin filaments are actin (with tropomyosin and troponin).
Q5 — Mechanism of Muscle Contraction · easy · theory
The ion whose release from the sarcoplasmic reticulum triggers muscle contraction is:
A. Calcium (Ca²⁺) ✓ Correct
B. Sodium (Na⁺)
C. Potassium (K⁺)
D. Chloride (Cl⁻)
Solution: A nerve impulse causes Ca²⁺ release, which initiates the contraction cycle by exposing actin binding sites.
Q6 — Mechanism of Muscle Contraction · easy · theory
The neurotransmitter released at the neuromuscular junction to stimulate a muscle fibre is:
A. Insulin
B. Acetylcholine ✓ Correct
C. Adrenaline
D. Dopamine
Solution: Acetylcholine released at the motor end-plate depolarises the sarcolemma, initiating contraction.
Q7 — Skeletal System · easy · theory
The total number of bones in the adult human body is:
A. 256
B. 306
C. 106
D. 206 ✓ Correct
Solution: The adult human skeleton has 206 bones (axial 80 + appendicular 126).
Q8 — Skeletal System · easy · theory
The axial skeleton includes the skull, vertebral column, ribs and:
A. Femur
B. Pelvic girdle
C. Humerus
D. Sternum ✓ Correct
Solution: The axial skeleton = skull, vertebral column, ribs and sternum (80 bones).
Q9 — Joints & Disorders · easy · theory
The freely movable joints that allow maximum movement (e.g. at the shoulder and knee) are:
A. Cartilaginous joints
B. Fixed joints
C. Synovial joints ✓ Correct
D. Fibrous joints
Solution: Synovial joints (with a fluid-filled cavity) allow considerable movement, as at the limbs.
Q10 — Joints & Disorders · easy · theory
The ball-and-socket joint is found at the:
A. Elbow
B. Shoulder (and hip) ✓ Correct
C. Skull
D. Knee
Solution: Ball-and-socket joints (shoulder, hip) permit movement in all planes/rotation.
Q11 — Types of Movement & Muscle · easy · numerical
Which of the following correctly lists the three main types of movement exhibited by cells of the human body?
A. Muscular, flagellar and ciliary
B. Ciliary, flagellar and pseudopodial
C. Amoeboid, flagellar and muscular
D. Amoeboid, ciliary and muscular ✓ Correct
Solution: The human body shows amoeboid (by pseudopodia, e.g. leucocytes), ciliary (in ducts lined by ciliated epithelium) and muscular movement. Flagellar movement is seen only in sperms and is not counted among these three general types.
Q12 — Types of Movement & Muscle · easy · numerical
Excitability, contractility, extensibility and elasticity together describe the special functional properties of which tissue?
A. Areolar connective tissue
B. Muscular tissue ✓ Correct
C. Nervous tissue
D. Glandular epithelium
Solution: These four properties — the ability to respond to stimuli, shorten, stretch and return to original length — are the defining functional properties of muscular tissue, which enables locomotion and movement.
Q13 — Types of Movement & Muscle · easy · numerical
Muscle constitutes roughly what fraction of an adult human's body weight and is mesodermal in origin?
A. About 10–15 %
B. About 70–75 %
C. About 25–30 %
D. About 40–50 % ✓ Correct
Solution: Muscles account for about 40–50 % of body weight in an adult and develop from the mesoderm, reflecting their bulk and importance in movement and posture.
Q14 — Types of Movement & Muscle · easy · numerical
Flagellar movement in the human body is exemplified by which of the following?
A. The movement of ova in the fallopian tube
B. The propulsion of mucus in the trachea
C. The engulfing of bacteria by neutrophils
D. The swimming of spermatozoa ✓ Correct
Solution: Flagellar movement is shown by the tail-driven swimming of sperm. Ova and tracheal mucus are moved by cilia, and neutrophil engulfment is amoeboid movement.
Q15 — Skeletal Muscle Structure · easy · numerical
A bundle of muscle fibres held together by a common collagenous connective-tissue sheath is called a:
A. Sarcomere
B. Fascicle ✓ Correct
C. Myofibril
D. Sarcomere disc
Solution: Many muscle fibres bundle together into a fascicle wrapped by connective tissue; groups of fascicles form the muscle. A sarcomere and myofibril are sub-cellular contractile units, not bundles of fibres.
Q16 — Skeletal Muscle Structure · easy · numerical
In a muscle fibre the plasma membrane, cytoplasm and endoplasmic reticulum are respectively given the special names:
A. Sarcoplasmic reticulum, sarcolemma and sarcoplasm
B. Sarcolemma, sarcoplasmic reticulum and sarcoplasm
C. Sarcolemma, sarcoplasm and sarcoplasmic reticulum ✓ Correct
D. Sarcoplasm, sarcolemma and sarcoplasmic reticulum
Solution: In muscle, the membrane is the sarcolemma, the cytoplasm is the sarcoplasm, and the endoplasmic reticulum is the sarcoplasmic reticulum, which stores calcium ions.
Q17 — Skeletal Muscle Structure · easy · numerical
The alternating light and dark bands that give skeletal muscle its striated appearance are due to the arrangement of:
A. Nuclei along the sarcolemma
B. Collagen fibres in the perimysium
C. Actin and myosin filaments in the myofibrils ✓ Correct
D. Mitochondria and sarcoplasmic reticulum
Solution: The striations arise from the regular, overlapping arrangement of thin actin and thick myosin filaments; the dark A band and light I band alternate along each myofibril.
Q18 — Skeletal Muscle Structure · easy · numerical
The portion of a myofibril between two successive Z lines represents one:
A. H zone
B. A band
C. I band
D. Sarcomere ✓ Correct
Solution: A sarcomere, the structural and functional unit of the myofibril, is defined as the region between two consecutive Z lines and contains one full A band flanked by half I bands.
Q19 — Mechanism of Muscle Contraction · easy · numerical
According to the sliding filament theory, muscle contraction occurs when:
A. Thin filaments slide over thick filaments, shortening the sarcomere ✓ Correct
B. Only the thick filaments contract while the thin ones lengthen
C. Both thin and thick filaments shorten in length
D. The Z lines dissolve and the myofibrils fuse together
Solution: In the sliding filament theory the filaments themselves do not shorten; the thin filaments slide inward over the stationary thick filaments, pulling the Z lines closer and shortening the sarcomere.
Q20 — Mechanism of Muscle Contraction · easy · numerical
The signal that spreads from the neuromuscular junction into the muscle fibre and triggers Ca²⁺ release is a:
A. Wave of hyperpolarisation
B. Wave of depolarisation (action potential) ✓ Correct
C. Direct flow of ATP molecules
D. Rise in blood oxygen level
Solution: Acetylcholine generates an action potential (depolarisation wave) that travels along the sarcolemma and T-tubules, causing the sarcoplasmic reticulum to release stored calcium ions.
Q21 — Mechanism of Muscle Contraction · easy · numerical
During muscle contraction, the cross bridges are formed between:
A. Two adjacent actin filaments
B. The myosin heads and the active sites on actin ✓ Correct
C. The Z line and the M line
D. Troponin and tropomyosin
Solution: The globular heads of myosin bind to exposed active sites on actin to form cross bridges; the subsequent bending of these heads (power stroke) pulls the actin filament inward.
Q22 — Mechanism of Muscle Contraction · easy · numerical
Which molecule directly supplies the energy needed for the myosin head to detach from actin and re-cock during contraction?
A. Lactic acid
B. Glucose
C. Creatine
D. ATP ✓ Correct
Solution: ATP binds the myosin head causing it to release actin, and its hydrolysis re-energises (re-cocks) the head for the next cycle. Glucose and creatine are ultimate fuel sources but do not act directly on myosin.
Q23 — Skeletal System · easy · numerical
The human skeletal system is divided into which two main divisions?
A. Cartilaginous and bony skeleton
B. Cranial and facial skeleton
C. Axial and appendicular skeleton ✓ Correct
D. Central and peripheral skeleton
Solution: The skeleton is grouped into the axial skeleton (skull, vertebral column, ribs and sternum) and the appendicular skeleton (limb bones and their girdles).
Q24 — Skeletal System · easy · numerical
The number of bones forming the axial skeleton of an adult human is:
A. 80 ✓ Correct
B. 206
C. 64
D. 126
Solution: The axial skeleton comprises 80 bones — the skull, vertebral column, ribs and sternum — while the appendicular skeleton has 126, together totalling 206 bones.
Q25 — Skeletal System · easy · numerical
The human skull is made up of how many bones (cranial plus facial)?
A. 22 ✓ Correct
B. 14
C. 8
D. 29
Solution: The skull consists of 22 bones — 8 cranial bones that enclose the brain and 14 facial bones. (Counting the hyoid and ear ossicles separately, the skull region has 29 bones in all.)
Q26 — Skeletal System · easy · numerical
The long bones of the limbs, such as the femur, primarily function in:
A. Filtration of blood
B. Production of digestive enzymes
C. Storage of urea
D. Weight bearing and movement ✓ Correct
Solution: Long bones like the femur are load-bearing levers that, worked by muscles, enable locomotion and support body weight; their marrow also contributes to blood-cell formation.
Q27 — Joints & Disorders · easy · numerical
Joints are broadly classified on the basis of their structure and mobility into which three types?
A. Fixed, movable and floating joints
B. Ball-and-socket, hinge and pivot joints
C. Fibrous, cartilaginous and synovial joints ✓ Correct
D. Bony, muscular and ligamentous joints
Solution: Structurally, joints are grouped as fibrous (largely immovable, e.g. skull sutures), cartilaginous (limited movement, e.g. between vertebrae) and synovial (freely movable, e.g. limb joints).
Q28 — Joints & Disorders · easy · numerical
The type of synovial joint present between the atlas and axis vertebrae, allowing rotation of the head, is a:
A. Pivot joint ✓ Correct
B. Hinge joint
C. Gliding joint
D. Saddle joint
Solution: The atlas–axis articulation is a pivot joint that permits rotational movement, enabling the head to turn from side to side.
Q29 — Joints & Disorders · easy · numerical
Osteoporosis, a common age-related disorder, is characterised by:
A. Deposition of uric acid crystals in the joints
B. An autoimmune attack on the synovial membranes
C. Decreased bone mass and mineral density, increasing fracture risk ✓ Correct
D. Progressive degeneration of skeletal muscle fibres
Solution: Osteoporosis involves reduced bone mass and mineral (calcium) density — often linked to a fall in oestrogen after menopause — making bones fragile and prone to fractures.
Q30 — Joints & Disorders · easy · numerical
The joint found between the carpal and metacarpal of the thumb, allowing movement in two planes, is a:
A. Pivot joint
B. Ball-and-socket joint
C. Hinge joint
D. Saddle joint ✓ Correct
Solution: The carpal–metacarpal joint of the thumb is a saddle joint, which permits movement in two planes and gives the thumb its opposable, versatile mobility.