Locomotion and Movement Chapter-Wise Test 20

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which type of movement is seen in the human eyelids?

Ciliary movement
Muscular movement
Amoeboid movement
Gliding movement
2

Muscular movement, controlled by skeletal muscles, is responsible for the opening and closing of eyelids.

Which of the following is the first bone to undergo ossification during human development?

Clavicle
Femur
Humerus
Radius
1

The clavicle is the first bone to begin ossification during fetal development.

Which of the following disorders is incorrectly matched with its cause?

Myasthenia gravis - Autoimmune disorder
Osteoporosis - Low estrogen levels
Gout - Uric acid accumulation
Tetany - Excess calcium in body fluids
4

Tetany is caused by low calcium levels in body fluids, not excess calcium​.

Which muscle protein forms the thick filaments in the sarcomere?

Actin
Troponin
Tropomyosin
Myosin
4

Myosin forms thick filaments and plays a crucial role in muscle contraction.

Which condition is characterized by reduced bone density and increased risk of fractures?

Rickets
Osteoporosis
Arthritis
Gout
2

Osteoporosis is a condition where bones lose density, making them fragile and prone to fractures.

Which connective tissue connects bones to other bones?

Tendon
Ligament
Cartilage
Synovial membrane
2

Ligaments are strong connective tissues that connect bones and stabilize joints.

What is the primary function of the Z-line in a sarcomere?

Stores calcium ions
Anchors actin filaments
Binds myosin filaments
Produces ATP
2

The Z-line anchors actin filaments and marks the boundary of a sarcomere, the functional unit of muscle contraction.

Which type of joint connects the skull bones?

Synovial joint
Cartilaginous joint
Fibrous joint
Hinge joint
3

Fibrous joints, such as sutures in the skull, allow little to no movement.

Which type of muscle contraction occurs when tension is generated without changing muscle length?

Isotonic contraction
Isometric contraction
Eccentric contraction
Concentric contraction
2

Isometric contractions generate tension without a change in muscle length, such as holding a weight steady.

Which mineral is most important for muscle contraction?

Iron
Sodium
Calcium
Magnesium
3

Calcium is essential for muscle contraction as it binds to troponin, triggering actin-myosin interaction.

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