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P.7 Topic 1: The Muscular and Skeletal System Quiz

16 Standard National Curriculum Questions • Immediate Millisecond Evaluation • Official UNEB Rationales

Question: 1 / 16

Score: 0 / 0 (0%)

P.7 • Topic 1 Question 1 of 16

1 Mark • UNEB Standard

Which of the following organisms relies on a hydrostatic skeleton for movement and structural support?

💡 UNEB Examiner Insight & Textbook Rationale

Earthworms possess a hydrostatic skeleton where pressurized coelomic fluid inside the body cavity provides support and enables circular/longitudinal muscles to contract.

P.7 • Topic 1 Question 2 of 16

1 Mark • UNEB Standard

Which bone of the human appendicular skeleton is recognized as the longest, heaviest, and strongest in the human body?

💡 UNEB Examiner Insight & Textbook Rationale

The Femur (thigh bone) is the longest, heaviest, and strongest bone in the human body, extending from the hip socket down to the knee.

P.7 • Topic 1 Question 3 of 16

1 Mark • UNEB Standard

What is the total number of vertebrae found in the normal human vertebral column (backbone)?

💡 UNEB Examiner Insight & Textbook Rationale

The human vertebral column contains exactly 33 vertebrae: 7 cervical, 12 thoracic, 5 lumbar, 5 sacral (fused), and 4 caudal/coccyx (fused).

P.7 • Topic 1 Question 4 of 16

1 Mark • UNEB Standard

In the Primary 7 wooden teaching arm model, what does the upper wooden strip represent?

💡 UNEB Examiner Insight & Textbook Rationale

In the wooden arm model, the upper piece of wood represents the Humerus (upper arm bone), acting as the fixed anchor bone.

P.7 • Topic 1 Question 5 of 16

1 Mark • UNEB Standard

Why must an insect periodically undergo moulting (ecdysis) during its development?

💡 UNEB Examiner Insight & Textbook Rationale

Because an exoskeleton is composed of a non-living, rigid cuticle, it cannot stretch. Arthropods must shed the old cuticle periodically to grow.

P.7 • Topic 1 Question 6 of 16

1 Mark • UNEB Standard

Which type of movable joint allows omnidirectional movement in all directions (360-degree rotation)?

💡 UNEB Examiner Insight & Textbook Rationale

A ball and socket joint (such as the shoulder and hip joints) allows rotation and movement in all three planes (omnidirectional).

P.7 • Topic 1 Question 7 of 16

1 Mark • UNEB Standard

What happens to the antagonistic arm muscles when a person bends (flexes) their arm at the elbow?

💡 UNEB Examiner Insight & Textbook Rationale

When bending the arm, the biceps acts as a flexor and contracts (shortens and bulges), while the triceps relaxes (lengthens and thins).

P.7 • Topic 1 Question 8 of 16

1 Mark • UNEB Standard

What is the first aid procedure R.I.C.E. used to manage?

💡 UNEB Examiner Insight & Textbook Rationale

R.I.C.E. (Rest, Ice, Compression, Elevation) is the official first aid protocol for managing soft tissue injuries: sprains, strains, and dislocations.

P.7 • Topic 1 Question 9 of 16

1 Mark • UNEB Standard

What is the primary physiological function of articular cartilage found capping the ends of long bones at a joint?

💡 UNEB Examiner Insight & Textbook Rationale

Smooth articular cartilage cushions the articulating ends of bones, absorbs mechanical shock, and prevents direct bone-to-bone rubbing friction.

P.7 • Topic 1 Question 10 of 16

1 Mark • UNEB Standard

A Primary 7 child developed soft, weak leg bones that bowed outward under body weight. Which nutritional deficiency disease is this?

💡 UNEB Examiner Insight & Textbook Rationale

Rickets is caused by a nutritional deficiency of Vitamin D, Calcium, or Phosphorus, resulting in soft pliable bones that bend into bow-legs or knock-knees.

P.7 • Topic 1 Question 11 of 16

1 Mark • UNEB Standard

Which tough connective tissue joins a bone to another bone at a movable joint?

💡 UNEB Examiner Insight & Textbook Rationale

Ligaments join bone to bone at a joint (BLB: Bone-Ligament-Bone), stabilizing the joint and preventing dislocation.

P.7 • Topic 1 Question 12 of 16

1 Mark • UNEB Standard

How many pairs of ribs in the human rib cage are classified as True Ribs?

💡 UNEB Examiner Insight & Textbook Rationale

The rib cage has 7 pairs of True Ribs (pairs 1 to 7) that attach directly to the sternum in front via their own costal cartilages.

P.7 • Topic 1 Question 13 of 16

1 Mark • UNEB Standard

What type of fracture occurs when a broken bone tears through muscle tissue and pierces outside through the skin?

💡 UNEB Examiner Insight & Textbook Rationale

A Compound (open) fracture occurs when the broken bone pierces through the skin, causing an open bleeding wound with high risk of bacterial infection.

P.7 • Topic 1 Question 14 of 16

1 Mark • UNEB Standard

Which of the following describes the correct posture when lifting a heavy box from the floor?

💡 UNEB Examiner Insight & Textbook Rationale

Lifting should be done by squatting down with a straight back and pushing upward using the powerful thigh muscles (quadriceps), not the waist.

P.7 • Topic 1 Question 15 of 16

1 Mark • UNEB Standard

Which of the following is an airborne bacterial disease that attacks the human skeletal spine?

💡 UNEB Examiner Insight & Textbook Rationale

Tuberculosis of the spine (Spinal TB) is caused by Mycobacterium tuberculosis bacteria, spreading through airborne droplets or unboiled milk, causing severe backache and hunchback deformities.

P.7 • Topic 1 Question 16 of 16

1 Mark • UNEB Standard

What is the primary function of splints applied during first aid for a fractured limb?

💡 UNEB Examiner Insight & Textbook Rationale

Splints hold the broken bone in one fixed position (immobilize it), preventing the jagged bone ends from cutting blood vessels, nerves, or muscles.

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