Learn › NEET · Biology › Locomotion and Movement
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.
▶ Practise Locomotion and Movement online (free)
Subtopics
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 · hard · theory
Ciliary movement in humans occurs in the ______, helping to move ______:
A. Trachea and Fallopian tubes; mucus/ova respectively ✓ Correct
B. Heart; blood only
C. Limbs; bones
D. Brain; neurons
Solution: Cilia line the respiratory tract (move dust-laden mucus) and oviducts (move the ovum).
Q12 — Types of Movement & Muscle · hard · theory
Which set correctly matches muscle type to control? Skeletal, Cardiac, Smooth —
A. Involuntary, Involuntary, Voluntary
B. Involuntary, Voluntary, Voluntary
C. Voluntary, Involuntary, Involuntary ✓ Correct
D. Voluntary, Voluntary, Involuntary
Solution: Skeletal = voluntary; cardiac and smooth = involuntary.
Q13 — Skeletal Muscle Structure · hard · theory
During muscle contraction (sliding filament theory), the ______ shortens while the length of the ______ remains unchanged:
A. A band; I band
B. Sarcomere; myosin filament grows
C. A band; H zone
D. I band and H zone; A band ✓ Correct
Solution: Sliding filament theory: I band and H zone shorten and the sarcomere shortens, but the A band (myosin) length is constant.
Q14 — Skeletal Muscle Structure · hard · theory
The centre of the A band, appearing lighter and lacking thin filaments (at rest), is the:
A. Z line
B. H zone (with the M line at its centre) ✓ Correct
C. I band
D. Sarcolemma
Solution: The H zone is the central A-band region with only thick filaments; the M line bisects it.
Q15 — Mechanism of Muscle Contraction · hard · theory
The reddish muscle fibres that resist fatigue contain abundant ______ and rely on ______ respiration:
A. Actin only; anaerobic
B. Glycogen only; anaerobic
C. Myoglobin/mitochondria; aerobic ✓ Correct
D. Calcium; fermentation
Solution: Red (type I) fibres have plentiful myoglobin and mitochondria, favouring aerobic respiration and endurance.
Q16 — Mechanism of Muscle Contraction · hard · theory
The rigor mortis (stiffening of muscles after death) occurs because:
A. Muscles keep contracting with energy
B. ATP is no longer available to detach the myosin heads from actin ✓ Correct
C. Calcium is completely removed
D. Too much ATP is present
Solution: Without ATP, cross-bridges cannot detach, so actin and myosin remain locked — causing rigor mortis.
Q17 — Skeletal System · hard · theory
The human vertebral column consists of ______ vertebrae, formed from ______ at birth (some fuse later):
A. 26; 26
B. 12; 7
C. 33; 26
D. 26; 33 ✓ Correct
Solution: An adult has 26 vertebrae (some cervical/sacral/coccygeal fuse) from 33 present at birth.
Q18 — Skeletal System · hard · theory
The pectoral girdle (shoulder) is made of the ______, while the pelvic girdle is made of the ______:
A. Two coxal bones; clavicle and scapula
B. Femur and tibia; humerus and radius
C. Sternum and ribs; skull bones
D. Clavicle and scapula; two coxal (hip) bones ✓ Correct
Solution: Pectoral girdle = clavicle + scapula; pelvic girdle = two coxal bones (ilium, ischium, pubis).
Q19 — Joints & Disorders · hard · theory
Osteoporosis, common in older people (especially post-menopausal women), is characterised by:
A. Inflammation of joints by the immune system
B. Low blood calcium causing muscle spasms
C. Excess uric acid in joints
D. Decreased bone mass and mineral density due to reduced oestrogen ✓ Correct
Solution: Osteoporosis is age/oestrogen-related loss of bone mass and density, raising fracture risk.
Q20 — Joints & Disorders · hard · theory
Gout is a joint disorder caused by the inflammation due to the accumulation of ______ crystals in the joints:
A. Uric acid ✓ Correct
B. Calcium carbonate
C. Oxalate
D. Cholesterol
Solution: Gout results from deposition of uric acid (urate) crystals in the joints, causing painful inflammation.
Q21 — Types of Movement & Muscle · medium · theory
Amoeboid movement in humans (e.g. by macrophages and leucocytes) is brought about by:
A. Muscle contraction
B. Flagella
C. Pseudopodia formed by streaming of protoplasm (microfilaments) ✓ Correct
D. Cilia
Solution: Amoeboid movement uses pseudopodia formed by cytoskeletal filaments (actin), as in WBCs and macrophages.
Q22 — Types of Movement & Muscle · medium · theory
Smooth (unstriated) muscle is found in the walls of internal organs such as the:
A. Alimentary canal and blood vessels ✓ Correct
B. Heart only
C. Limbs
D. Tongue
Solution: Smooth muscle is involuntary, non-striated, and lines hollow visceral organs (gut, blood vessels, etc.).
Q23 — Skeletal Muscle Structure · medium · theory
The region of a sarcomere containing only thin filaments, which shrinks during contraction, is the:
A. I band (isotropic, light band) ✓ Correct
B. A band
C. M line
D. H zone only
Solution: The I band (actin only) shortens on contraction; the A band (myosin length) stays constant.
Q24 — Skeletal Muscle Structure · medium · theory
The thin filament of a myofibril is composed of actin plus the regulatory proteins:
A. Myosin and myoglobin
B. Keratin and casein
C. Tropomyosin and troponin ✓ Correct
D. Collagen and elastin
Solution: Each actin (F-actin) filament carries tropomyosin and troponin, which regulate the actin–myosin interaction.
Q25 — Mechanism of Muscle Contraction · medium · theory
Ca²⁺ initiates contraction by binding to ______, which moves ______ to expose the myosin-binding sites on actin:
A. Tropomyosin; troponin
B. Actin; myoglobin
C. Troponin; tropomyosin ✓ Correct
D. Myosin; actin
Solution: Ca²⁺ binds troponin, shifting tropomyosin away from actin's binding sites so cross-bridges can form.
Q26 — Mechanism of Muscle Contraction · medium · theory
The energy for the sliding of filaments (breaking of the actin-myosin cross-bridge) comes from:
A. Hydrolysis of ATP ✓ Correct
B. Lactic acid
C. Ca²⁺ binding alone
D. Oxygen alone
Solution: ATP binds the myosin head to release it from actin; its hydrolysis re-cocks the head for the next stroke.
Q27 — Skeletal System · medium · theory
The number of pairs of ribs in humans is ______, of which ______ pairs are "true" ribs:
A. 10 pairs; 5 pairs
B. 12 pairs; 5 pairs
C. 12 pairs; 7 pairs ✓ Correct
D. 14 pairs; 7 pairs
Solution: Humans have 12 pairs of ribs; the first 7 (true ribs) attach directly to the sternum.
Q28 — Skeletal System · medium · theory
The appendicular skeleton consists of the bones of the limbs and their girdles; the number of bones in it is:
A. 100
B. 126 ✓ Correct
C. 206
D. 80
Solution: The appendicular skeleton has 126 bones — limb bones plus the pectoral and pelvic girdles.
Q29 — Joints & Disorders · medium · theory
The autoimmune disorder in which the immune system attacks the joints (causing inflammation) is:
A. Osteoporosis
B. Tetany
C. Rheumatoid arthritis ✓ Correct
D. Gout
Solution: Rheumatoid arthritis is an autoimmune joint inflammation; osteoporosis is bone loss, gout is uric acid crystal deposition.
Q30 — Joints & Disorders · medium · theory
The hinge joint, which allows movement in only one plane (e.g. bending), is found at the:
A. Elbow and knee ✓ Correct
B. Shoulder
C. Neck (atlas–axis)
D. Wrist rotation
Solution: Hinge joints (elbow, knee) allow movement in a single plane like a door hinge.