Locomotion and Movement – Daily Practice Problem (DPP)

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🎯 NEET 2026 Daily Practice Problem (DPP)

Topic: Locomotion and Movement | 20 High-Yield MCQs

Q1. Macrophages and leucocytes in the blood exhibit which type of movement?

  1. Ciliary movement
  2. Flagellar movement
  3. Amoeboid movement
  4. Muscular movement
✅ View Answer & Explanation

Correct Answer: (3) Amoeboid movement
Explanation: Some specialized cells like macrophages and leucocytes move using pseudopodia, similar to Amoeba.

Q2. The functional unit of contraction in a muscle fiber is:

  1. Sarcomere
  2. Sarcoplasm
  3. Myofibril
  4. Fascicle
✅ View Answer & Explanation

Correct Answer: (1) Sarcomere
Explanation: A sarcomere is the portion of a myofibril between two successive Z-lines and is the basic functional unit of muscle contraction.

Q3. Which protein mask the active binding sites for myosin on the actin filaments in a resting state?

  1. Troponin
  2. Tropomyosin
  3. Meromyosin
  4. Actinin
✅ View Answer & Explanation

Correct Answer: (1) Troponin
Explanation: In a resting state, a subunit of troponin masks the active binding sites for myosin on the actin filaments.

Q4. The ‘Sliding Filament Theory’ can be best explained as:

  1. Actin and Myosin filaments shorten and slide pass each other
  2. Actin and Myosin filaments do not shorten but rather slide pass each other
  3. When myofilaments slide pass each other, Myosin filaments shorten while Actin filaments do not
  4. When myofilaments slide pass each other, Actin filaments shorten while Myosin filaments do not
✅ View Answer & Explanation

Correct Answer: (2) Actin and Myosin filaments do not shorten but rather slide pass each other
Explanation: Contraction occurs by the sliding of thin filaments over the thick filaments without actual shortening of the individual filaments.

Q5. Which of the following ions is essential for muscle contraction as it triggers the release of binding sites?

  1. $Na^+$
  2. $K^+$
  3. $Ca^{++}$
  4. $Mg^{++}$
✅ View Answer & Explanation

Correct Answer: (3) $Ca^{++}$
Explanation: Calcium ions bind to troponin, causing a conformational change that unmasks the active sites on actin.

Q6. The number of occipital condyles in the human skull is:

  1. One
  2. Two
  3. Three
  4. Four
✅ View Answer & Explanation

Correct Answer: (2) Two
Explanation: Human skull is dicondylic because it possesses two occipital condyles that articulate with the first vertebra (atlas).

Q7. Which of the following is a ‘Floating Rib’ in humans?

  1. 7th pair
  2. 8th pair
  3. 9th pair
  4. 12th pair
✅ View Answer & Explanation

Correct Answer: (4) 12th pair
Explanation: The last two pairs of ribs (11th and 12th) are not connected ventrally and are called floating ribs.

Q8. The joint between the atlas and axis is an example of:

  1. Ball and socket joint
  2. Pivot joint
  3. Hinge joint
  4. Saddle joint
✅ View Answer & Explanation

Correct Answer: (2) Pivot joint
Explanation: The pivot joint between atlas and axis allows for the rotational movement of the head (the “no” movement).

Q9. Myasthenia gravis is an autoimmune disorder that affects:

  1. Skeletal muscles directly
  2. Neuromuscular junction
  3. Smooth muscles
  4. Joints
✅ View Answer & Explanation

Correct Answer: (2) Neuromuscular junction
Explanation: It leads to fatigue, weakening, and paralysis of skeletal muscles by attacking acetylcholine receptors at the NMJ.

Q10. The total number of bones in the human hind limb is:

  1. 24
  2. 30
  3. 14
  4. 20
✅ View Answer & Explanation

Correct Answer: (2) 30
Explanation: Femur (1), Patella (1), Tibia-Fibula (2), Tarsals (7), Metatarsals (5), Phalanges (14) = 30 bones.

Q11. Glenoid cavity articulates:

  1. Scapula with acromion
  2. Clavicle with scapula
  3. Humerus with scapula
  4. Clavicle with acromion
✅ View Answer & Explanation

Correct Answer: (3) Humerus with scapula
Explanation: The head of the humerus fits into the glenoid cavity of the pectoral girdle (scapula) to form the shoulder joint.

Q12. Accumulation of uric acid crystals in joints causing inflammation is called:

  1. Osteoporosis
  2. Gout
  3. Arthritis
  4. Tetany
✅ View Answer & Explanation

Correct Answer: (2) Gout
Explanation: Gout is a specific type of arthritis caused by the deposition of monosodium urate crystals in joint spaces.

Q13. Red muscle fibres are rich in:

  1. Sarcoplasmic reticulum
  2. Myoglobin and mitochondria
  3. Lactic acid
  4. Glycogen only
✅ View Answer & Explanation

Correct Answer: (2) Myoglobin and mitochondria
Explanation: Red fibres (Aerobic muscles) contain high myoglobin content and many mitochondria for sustainable energy production.

Q14. The H-zone in the skeletal muscle fibre is due to:

  1. The central gap between myosin filaments in the A-band
  2. The central gap between actin filaments extending through myosin filaments in the A-band
  3. Extension of myosin filaments in the central portion of the A-band
  4. Absence of myofibrils in the central portion of A-band
✅ View Answer & Explanation

Correct Answer: (2) Central gap between actin filaments
Explanation: The H-zone is the central part of the thick filament (A-band) which is not overlapped by thin filaments (actin).

Q15. Knee joint and elbow joint are examples of:

  1. Saddle joint
  2. Ball and socket joint
  3. Pivot joint
  4. Hinge joint
✅ View Answer & Explanation

Correct Answer: (4) Hinge joint
Explanation: Hinge joints allow movement primarily in one plane (flexion and extension), like the hinge of a door.

Q16. During muscle contraction, which of the following does NOT shorten?

  1. I-band
  2. A-band
  3. Sarcomere
  4. H-zone
✅ View Answer & Explanation

Correct Answer: (2) A-band
Explanation: The A-band (thick filaments) remains constant in length. I-band, H-zone, and the total sarcomere shorten.

Q17. Acetabulum is found in:

  1. Pectoral girdle
  2. Pelvic girdle
  3. Skull
  4. Vertebral column
✅ View Answer & Explanation

Correct Answer: (2) Pelvic girdle
Explanation: Acetabulum is the cavity in the pelvic girdle where the head of the femur articulates to form the hip joint.

Q18. Wild contractions in muscles due to low $Ca^{++}$ in body fluid is called:

  1. Tetany
  2. Tetanus
  3. Fatigue
  4. Dystrophy
✅ View Answer & Explanation

Correct Answer: (1) Tetany
Explanation: Hypocalcemic tetany involves involuntary muscle spasms due to low calcium levels increasing neuronal excitability.

Q19. The monomeric protein which polymerizes to form Myosin is:

  1. G-actin
  2. Meromyosin
  3. Tropomyosin
  4. Troponin
✅ View Answer & Explanation

Correct Answer: (2) Meromyosin
Explanation: Each thick filament (myosin) is a polymerized protein made of many monomeric proteins called meromyosins.

Q20. Synovial joints are characterized by:

  1. Presence of fluid-filled synovial cavity
  2. Fixed and immovable nature
  3. Presence of white fibrous tissue only
  4. Slight movement only
✅ View Answer & Explanation

Correct Answer: (1) Presence of fluid-filled synovial cavity
Explanation: Synovial joints (freely movable joints) have a cavity filled with synovial fluid which reduces friction between articulating surfaces.

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