Locomotion and Movement Chapter-Wise Test 13

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which structure in skeletal muscle conducts electrical impulses deep into the muscle fiber?

Sarcoplasmic reticulum
T-tubules
Z-line
Myosin filaments
2

T-tubules conduct action potentials deep into muscle fibers, ensuring efficient contraction.

Which of the following structures is responsible for anchoring actin filaments in a sarcomere?

M-line
Z-line
A-band
H-zone
2

The Z-line anchors actin filaments and marks the boundary of a sarcomere.

Which of the following bones is a part of the pelvic girdle?

Scapula
Clavicle
Ilium
Humerus
3

The ilium is one of the three bones that form the pelvic girdle, along with the ischium and pubis.

Which of the following statements about muscle contraction is correct?

Calcium ions play no role in contraction.
ATP is not required for contraction.
Myosin heads form cross-bridges with actin.
Actin filaments shorten during contraction.
3

Myosin heads bind to actin filaments to facilitate contraction​.

Which of the following movements is an example of adduction?

Lifting the arm sideways
Bringing the arm towards the body
Bending the knee
Rotating the wrist
2

Adduction is the movement toward the midline of the body​.

Which of the following joints is an example of a saddle joint?

Hip joint
Elbow joint
Thumb joint
Knee joint
3

The thumb joint (between the first metacarpal and the trapezium bone) is an example of a saddle joint.

Which of the following structures connects muscle to bone?

Ligament
Tendon
Cartilage
Synovial membrane
2

Tendons are strong connective tissues that connect muscles to bones, allowing movement.

Which of the following is an incorrect statement about the sliding filament theory?

Actin filaments slide over myosin filaments during contraction.
Myosin heads form cross-bridges with actin filaments.
ATP is not required for cross-bridge formation.
Calcium ions bind to troponin to expose binding sites on actin.
3

ATP is required for cross-bridge formation and subsequent muscle contraction​.

Which of the following statements about locomotion is correct?

All movements are locomotion.
Ciliary movement helps in the transport of ova in the female reproductive tract.
Muscles do not play any role in locomotion.
Hydra does not exhibit locomotion.
2

Ciliary movement helps in transporting ova through the female reproductive tract.

Which structure prevents hyperextension of the knee joint?

Achilles tendon
Anterior cruciate ligament
Patellar ligament
Meniscus
2

The anterior cruciate ligament (ACL) prevents hyperextension and provides knee stability.

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