Part 5: Skeletal System Overview – Axial and Appendicular Skeleton, Bones, Cartilages, Joints
Part 5 (25 MCQs) from Skeletal System Overview – Axial and Appendicular Skeleton, Bones, Cartilages, Joints in Chapter 20: Locomotion and Movement (NCERT Class 11 + NEET UG relevance).
Part 5: Skeletal System Overview – Axial and Appendicular Skeleton, Bones, Cartilages, Joints
Q1. The total number of bones in the human adult skeleton is:
a) 200
b) 206
c) 210
d) 215
Answer: b) 206
Explanation:
- ✅ (b) Human adult skeleton has 206 bones.
- Others are incorrect.
Q2. Axial skeleton includes:
a) Skull, vertebral column, ribs, sternum
b) Limbs and girdles
c) Pectoral and pelvic girdle
d) Only vertebral column
Answer: a) Skull, vertebral column, ribs, sternum
Explanation:
- ✅ (a) Axial skeleton = central framework (80 bones).
Q3. The appendicular skeleton consists of:
a) Skull and ribs
b) Limbs and girdles
c) Sternum and vertebral column
d) Ribs and clavicle
Answer: b) Limbs and girdles
Explanation:
- ✅ (b) Appendicular skeleton = 126 bones of limbs & girdles.
Q4. The number of bones in vertebral column is:
a) 24
b) 26
c) 28
d) 30
Answer: b) 26
Explanation:
- ✅ (b) Vertebral column has 26 vertebrae in adults (33 in children, fused later).
Q5. How many cervical vertebrae are present in humans?
a) 5
b) 6
c) 7
d) 8
Answer: c) 7
Explanation:
- ✅ (c) 7 cervical vertebrae (C1–C7).
Q6. The number of thoracic vertebrae is:
a) 5
b) 7
c) 10
d) 12
Answer: d) 12
Explanation:
- ✅ (d) Thoracic vertebrae = 12, articulate with ribs.
Q7. The number of lumbar vertebrae is:
a) 3
b) 5
c) 7
d) 9
Answer: b) 5
Explanation:
- ✅ (b) Lumbar = 5, largest vertebrae, bear body weight.
Q8. Sacrum is formed by fusion of:
a) 3 vertebrae
b) 4 vertebrae
c) 5 vertebrae
d) 6 vertebrae
Answer: c) 5 vertebrae
Explanation:
- ✅ (c) Sacrum = fusion of 5 vertebrae.
Q9. Coccyx is formed by fusion of:
a) 2 vertebrae
b) 3 vertebrae
c) 4 vertebrae
d) 5 vertebrae
Answer: c) 4 vertebrae
Explanation:
- ✅ (c) Coccyx = fusion of 4 small vertebrae.
Q10. The total number of ribs in humans is:
a) 12 pairs
b) 11 pairs
c) 13 pairs
d) 10 pairs
Answer: a) 12 pairs
Explanation:
- ✅ (a) Humans have 12 pairs of ribs (24 total).
Q11. How many pairs of true ribs are there?
a) 5
b) 7
c) 10
d) 12
Answer: b) 7
Explanation:
- ✅ (b) True ribs = first 7 pairs, directly attached to sternum.
Q12. False ribs are:
a) 8th, 9th, 10th pairs
b) 11th, 12th pairs
c) 1st and 2nd pairs
d) 5th and 6th pairs
Answer: a) 8th, 9th, 10th pairs
Explanation:
- ✅ (a) False ribs attach indirectly via 7th rib cartilage.
Q13. Floating ribs are:
a) 8th and 9th
b) 9th and 10th
c) 11th and 12th
d) 7th and 8th
Answer: c) 11th and 12th
Explanation:
- ✅ (c) Floating ribs do not connect to sternum.
Q14. Pectoral girdle consists of:
a) Clavicle and scapula
b) Sternum and scapula
c) Clavicle and humerus
d) Scapula and sternum
Answer: a) Clavicle and scapula
Explanation:
- ✅ (a) Pectoral girdle attaches upper limbs to axial skeleton.
Q15. Pelvic girdle consists of:
a) Ilium, ischium, pubis
b) Ilium and femur
c) Ilium and scapula
d) Femur and tibia
Answer: a) Ilium, ischium, pubis
Explanation:
- ✅ (a) Pelvic girdle = hip bone (fusion of ilium, ischium, pubis).
Q16. The longest bone in the human body is:
a) Tibia
b) Humerus
c) Femur
d) Fibula
Answer: c) Femur
Explanation:
- ✅ (c) Femur = longest, strongest bone.
Q17. The smallest bone in the human body is:
a) Incus
b) Malleus
c) Stapes
d) Fibula
Answer: c) Stapes
Explanation:
- ✅ (c) Stapes (ear ossicle) = smallest bone.
Q18. How many bones are present in human skull?
a) 20
b) 22
c) 24
d) 26
Answer: b) 22
Explanation:
- ✅ (b) Skull = 22 bones (8 cranial + 14 facial).
Q19. The vertebral column protects:
a) Brain
b) Spinal cord
c) Heart
d) Lungs
Answer: b) Spinal cord
Explanation:
- ✅ (b) Vertebral column surrounds & protects spinal cord.
Q20. The sternum is also known as:
a) Collar bone
b) Chest bone
c) Knee cap
d) Shoulder blade
Answer: b) Chest bone
Explanation:
- ✅ (b) Sternum = flat chest bone.
Q21. Cartilage is different from bone because:
a) It has blood supply
b) It has calcium salts
c) It lacks blood vessels
d) It is harder
Answer: c) It lacks blood vessels
Explanation:
- ✅ (c) Cartilage is avascular; bone is vascular.
Q22. Which joint connects skull bones?
a) Synovial
b) Cartilaginous
c) Fibrous
d) Ball-and-socket
Answer: c) Fibrous
Explanation:
- ✅ (c) Skull sutures = immovable fibrous joints.
Q23. Which joint is present in vertebral column?
a) Synovial pivot
b) Cartilaginous
c) Fibrous
d) Hinge
Answer: b) Cartilaginous
Explanation:
- ✅ (b) Intervertebral discs = cartilaginous joints.
Q24. The knee joint is an example of:
a) Pivot joint
b) Hinge joint
c) Ball-and-socket joint
d) Saddle joint
Answer: b) Hinge joint
Explanation:
- ✅ (b) Knee = hinge joint → uniaxial movement.
Q25. The atlas vertebra articulates with:
a) Axis vertebra
b) Occipital bone
c) Thoracic vertebra
d) Sacrum
Answer: b) Occipital bone
Explanation:
- ✅ (b) Atlas (C1) articulates with occipital condyles → nodding of head.
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