NEET Biology Locomotion and Movement MCQs Set 13

Multiple Choice Questions (MCQs) for NEET Biology: Locomotion and Movement

Access targeted multiple-choice questions for Locomotion and Movement designed to align with the latest NEET academic syllabus for NEET Biology. These objective practice sets help students evaluate their conceptual understanding and improve exam readiness.

Practice Locomotion and Movement MCQs for NEET Biology

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Multiple Choice Questions

Question 1: Muscle is a specialised tissue of which embryonic origin?
(a) Ectodermal
(b) Mesodermal
(c) Endodermal
(d) Neural crest only
Show Answer & Explanation

Answer: (b) Mesodermal

Explanation:
1. Muscles are mesodermal in origin.

Teacher's Note:
1. They show excitability, contractility, extensibility and elasticity.

Question 2: Which of the following is NOT a property of muscle?
(a) Excitability
(b) Contractility
(c) Secretion
(d) Elasticity
Show Answer & Explanation

Answer: (c) Secretion

Explanation:
1. Muscles show excitability, contractility, extensibility and elasticity, but not secretion.

Teacher's Note:
1. These properties enable movement.

Question 3: The three types of muscle are
(a) striated, cardiac and bone
(b) smooth, tendon and cardiac
(c) voluntary, striated and ligament
(d) skeletal, visceral and cardiac
Show Answer & Explanation

Answer: (d) skeletal, visceral and cardiac

Explanation:
1. Skeletal (striated, voluntary), visceral (smooth, involuntary) and cardiac (striated, involuntary).

Teacher's Note:
1. Cardiac muscles are branched and show intercalated discs.

Question 4: The plasma membrane of a muscle fibre is called
(a) sarcoplasm
(b) sarcomere
(c) sarcolemma
(d) sarcoplasmic reticulum
Show Answer & Explanation

Answer: (c) sarcolemma

Explanation:
1. Sarcolemma is the plasma membrane of the muscle fibre; its cytoplasm is the sarcoplasm.

Teacher's Note:
1. The sarcoplasmic reticulum stores calcium.

Question 5: A muscle fibre is a syncytium because
(a) it has only one nucleus
(b) it has no nucleus
(c) it has many cells joined
(d) its sarcoplasm contains many nuclei
Show Answer & Explanation

Answer: (d) its sarcoplasm contains many nuclei

Explanation:
1. Skeletal muscle fibres are multinucleate.

Teacher's Note:
1. The sarcoplasmic reticulum is the store of Ca2+.

Question 6: The store house of calcium ions in a muscle fibre is the
(a) mitochondrion
(b) sarcoplasmic reticulum
(c) Golgi body
(d) lysosome
Show Answer & Explanation

Answer: (b) sarcoplasmic reticulum

Explanation:
1. Ca2+ is released from the sarcoplasmic reticulum when a signal arrives, triggering contraction.

Teacher's Note:
1. It is a modified endoplasmic reticulum.

Question 7: Light bands (I bands) contain mainly ______ and dark bands (A bands) contain mainly ______.
(a) myosin, actin
(b) troponin, tropomyosin
(c) tropomyosin, myosin
(d) actin, myosin
Show Answer & Explanation

Answer: (d) actin, myosin

Explanation:
1. The I band has thin actin filaments and the A band has thick myosin filaments.

Teacher's Note:
1. Actin is isotropic, myosin anisotropic.

Question 8: The elastic fibre at the centre of each I band is the
(a) Z line
(b) M line
(c) H zone
(d) A band
Show Answer & Explanation

Answer: (a) Z line

Explanation:
1. Z line bisects each I band and anchors the thin filaments.

Teacher's Note:
1. The M line holds thick filaments in the middle of the A band.

Question 9: The functional unit of contraction in a myofibril is the
(a) sarcolemma
(b) myoblast
(c) sarcomere
(d) fascicle
Show Answer & Explanation

Answer: (c) sarcomere

Explanation:
1. The portion of a myofibril between two successive Z lines is a sarcomere.

Teacher's Note:
1. Many sarcomeres make a myofibril.

Question 10: Each actin filament is made of two F-actins that are
(a) straight and made of myosin
(b) helically wound and made of monomeric G-actins
(c) parallel and made of troponin
(d) circular and made of tropomyosin
Show Answer & Explanation

Answer: (b) helically wound and made of monomeric G-actins

Explanation:
1. Each F-actin is a polymer of G-actin monomers, and two F-actin strands are helically wound.

Teacher's Note:
1. Tropomyosin runs along the groove.

Question 11: A myosin monomer (meromyosin) has
(a) a globular head with a short arm, and a tail
(b) only a tail
(c) a head with troponin
(d) two heads with tropomyosin
Show Answer & Explanation

Answer: (a) a globular head with a short arm, and a tail

Explanation:
1. Meromyosin has a globular head with a short arm (heavy meromyosin) and a tail (light meromyosin); the head has ATP and actin binding sites.

Teacher's Note:
1. The head projects as a cross arm.

Question 12: The mechanism of muscle contraction is best explained by the
(a) cell theory
(b) fluid mosaic model
(c) sliding filament theory
(d) ratchet theory of ions
Show Answer & Explanation

Answer: (c) sliding filament theory

Explanation:
1. Thin filaments slide over thick filaments, shortening the sarcomere.

Teacher's Note:
1. The filaments themselves do not shorten.

Question 13: Muscle contraction is initiated by a signal sent by the
(a) central nervous system through a motor neuron
(b) sarcolemma on its own
(c) blood only
(d) hormone only
Show Answer & Explanation

Answer: (a) central nervous system through a motor neuron

Explanation:
1. A motor neuron releases acetylcholine at the neuromuscular junction, generating an action potential in the sarcolemma.

Teacher's Note:
1. This releases Ca2+.

Question 14: During muscle contraction ______ energy is converted into ______ energy.
(a) chemical, mechanical
(b) mechanical, chemical
(c) heat, chemical
(d) electrical, light
Show Answer & Explanation

Answer: (a) chemical, mechanical

Explanation:
1. ATP hydrolysis provides chemical energy that is converted into mechanical work by the myosin heads.

Teacher's Note:
1. ATP is needed for detaching the myosin head.

Question 15: Roughly what percentage of the adult human body weight is contributed by muscles?
(a) 10 to 15 percent
(b) 70 to 80 percent
(c) 40 to 50 percent
(d) 5 percent
Show Answer & Explanation

Answer: (c) 40 to 50 percent

Explanation:
1. Muscles make up 40 to 50 percent of body weight.

Teacher's Note:
1. They are highly vascularised.

Question 16: How many bones are there in the axial skeleton of an adult human?
(a) 126
(b) 80
(c) 206
(d) 60
Show Answer & Explanation

Answer: (b) 80

Explanation:
1. The skull, vertebral column, sternum and ribs make the axial skeleton of 80 bones; the appendicular skeleton has 126.

Teacher's Note:
1. The total is 206.

Question 17: The number of bones in the human cranium and in the face are respectively
(a) 8 and 14
(b) 14 and 8
(c) 6 and 16
(d) 22 and 0
Show Answer & Explanation

Answer: (a) 8 and 14

Explanation:
1. The skull has 22 bones, 8 cranial and 14 facial.

Teacher's Note:
1. The hyoid is a U-shaped bone at the base of the buccal cavity.

Question 18: The human skull articulates with the vertebral column by means of two occipital condyles, so it is called
(a) monocondylic
(b) tricondylic
(c) dicondylic
(d) acondylic
Show Answer & Explanation

Answer: (c) dicondylic

Explanation:
1. Mammals have a dicondylic skull; reptiles and birds have a single condyle.

Teacher's Note:
1. The first vertebra is the atlas.

Question 19: Number of bones in the human vertebral column is
(a) 26
(b) 33
(c) 22
(d) 12
Show Answer & Explanation

Answer: (a) 26

Explanation:
1. The adult vertebral column has 26 bones: 7 cervical, 12 thoracic, 5 lumbar, a fused sacrum and a fused coccyx.

Teacher's Note:
1. Infants have 33 vertebrae.

Question 20: Floating ribs are the ______ pairs.
(a) 1st and 2nd
(b) 11th and 12th
(c) 8th, 9th and 10th
(d) 6th and 7th
Show Answer & Explanation

Answer: (b) 11th and 12th

Explanation:
1. The 11th and 12th pairs are not connected ventrally to the sternum.

Teacher's Note:
1. There are 7 true ribs and 3 pairs of vertebrochondral ribs.

Question 21: The longest and strongest bone of the human body is the
(a) femur
(b) humerus
(c) tibia
(d) fibula
Show Answer & Explanation

Answer: (a) femur

Explanation:
1. The femur of the thigh is the longest and strongest bone.

Teacher's Note:
1. The cup-shaped patella covers the knee.

Question 22: Each half of the pectoral girdle consists of
(a) a clavicle and a scapula
(b) an ilium and an ischium
(c) a pubis and an ischium
(d) a humerus and a radius
Show Answer & Explanation

Answer: (a) a clavicle and a scapula

Explanation:
1. The scapula bears the glenoid cavity for the humerus, and the clavicle is the collar bone.

Teacher's Note:
1. The pelvic girdle has three fused bones: ilium, ischium and pubis.

Question 23: The joint between the atlas and axis is a ______ joint.
(a) hinge
(b) saddle
(c) pivot
(d) gliding
Show Answer & Explanation

Answer: (c) pivot

Explanation:
1. The atlas rotates over the axis in a pivot joint.

Teacher's Note:
1. The knee is a hinge joint and the shoulder a ball and socket joint.

Question 24: The joint between the carpal and metacarpal of the thumb is a
(a) hinge joint
(b) pivot joint
(c) ball and socket joint
(d) saddle joint
Show Answer & Explanation

Answer: (d) saddle joint

Explanation:
1. The thumb joint is a saddle joint, allowing wide movement.

Teacher's Note:
1. The joint at the shoulder is ball and socket.

Question 25: Joints between the cranial bones are
(a) synovial
(b) fibrous (sutures)
(c) cartilaginous
(d) pivot
Show Answer & Explanation

Answer: (b) fibrous (sutures)

Explanation:
1. Cranial bones are joined by dense fibrous connective tissue forming immovable sutures.

Teacher's Note:
1. Cartilaginous joints are found between adjacent vertebrae.

Question 26: The number of phalanges in each human limb is
(a) 8
(b) 5
(c) 14
(d) 7
Show Answer & Explanation

Answer: (c) 14

Explanation:
1. Each limb has 14 phalanges.

Teacher's Note:
1. Carpals are 8 and tarsals are 7.

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Practice MCQs for NEET Biology Locomotion and Movement

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