The human skeleton is composed either of cartilage or bones. Both tissues provide an internal supporting framework of the body. Human adults have bony skeleton, but cartilage is also present in some regions. There are number of bones in human body that help in support and movement.
Welcome to an intriguing exploration of the human skeleton in Class 12 Chapter 16: Support and Movement. The skeletal system forms the foundation of our body, comprising bones, joints, and connective tissues that work together to support, protect, and enable movement. Throughout this chapter, we'll uncover the secrets of our skeleton, understanding how its structure and functions intertwine to provide the necessary framework for our body's stability. We'll delve into the essential roles played by the skeletal system, from offering structural support to safeguarding vital organs like the heart and lungs.
Get ready to explore the remarkable complexity of the human skeleton, Join us as we embark on an enlightening journey through this chapter, decoding the marvels of our skeletal system and its pivotal role in supporting and enabling movement."
1. How many bones are there in adult human body?
Correct option is A (206 bones in body).
2. In early embryonic life the whole skeleton is made of:
A. Bones
B. Soft bones
C. Cartilage
D. Both B and C
Correct option is: D (both B and C).
3. Cartilage is a type of connective tissue consisting of cells called ________.
A. Osteocytes
B. Osteoblasts
C. Chondrocytes
D. Osteoclast
Correct option is: C (chondrocytes).
4. A tough, flexible matrix of cartilage is made up of ________.
A. Type I collagen
B. Type II collagen
C. Both of these
D. None of these
Correct option is: B (Type II collagen)
5. There are no blood vessels present in the ground substance of _________.
A. Cartilage
B. Bones
C. Both cartilage and bones
D. None of these
Correct option is: A (cartilage).
6. How many types of cartilage are there?
A. Two
B. Three
C. Four
D. Five
Correct option is: B (three).
7. In inter-vertebral disc which type of cartilage is present?
A. Hyaline cartilage
B. Fibrous cartilage
C. Elastic cartilage
D. None of these
Correct option is: B (fibrous cartilage).
8. Elastic cartilage supports the flexible portion of which part of the body?
A. Nose
B. External ear
C. Epiglottis
D. All of these
Correct option is: D (all of these).
9. Beauty bones is the other name of which bone?
A. Sternum
B. Clavicle
C. Humerus
D. Scapula
Correct option is: B (clavicle).
10. Bones the hardest and the most rigid form of __________ in the body.
A. Connective tissue
B. Epithelial tissue
C. Glandular tissue
D. None of these
Correct option is: A (connective tissue).
11. What are the function of bones?
A. Give shape and structure to the body
B. Protect delicate internal organ
C. Produce blood cells
D. All of these
Correct option is: D (all of these).
12. The intracellular space of bones are called _____________.
A. Osteocytes
B. Lacunae
C. Osteoclast
D. None of these
Correct option is: B (lacunae).
13. Bone marrow is present in which bones of the body?
A. Ribs
B. Sternum
C. Bones of pelvis
D. All of these
Correct option is: D (all of these).
14. In adult human, the matrix of bone consist of inorganic matter.
A. 65%
B. 75%
C. 95%
D. 100%
Correct option is: A (65%).
15. In adult human, the matrix of bones consist of_________.
A. Calcium phosphate
B. Sodium phosphate
C. Magnesium phosphate
D. All of these
Correct option is: A (calcium phosphate).
16. In adult human, the matrix of bones consist of ______ of organic substances.
A. 25%
B. 35%
C. 65%
D. 75%
Correct option is: B (35%)
17. Organic substances of bone matrix are:
A. Protein
B. Collagen
C. Both A and B
D. All of these
Correct option is: C (Both A and B).
18. Bones are composed of cells that are,
A. Osteoblasts
B. Osteoclasts
C. Osteocytes
D. All of these
Correct option is: D (all of these).
19. Immature bone cells are:
A. Osteoblast
B. Osteocytes
C. Chondrocytes
D. None of these
Correct option is: A (osteoblasts).
20. Responsible for the maintenance of bone and calcium is function of:
A. Osteoclast
B. Osteocyte
C. Osteoblasts
D. Chondrocytes
Correct option is: B (osteocyte).
21. Which one is true about bones?
A. No blood circulation
B. Having rich blood supply
C. No inorganic salts
D. None of these
Correct option is: B (having rich blood supply).
22. Calcium and phosphate may be released in to the blood, under the control of which hormone?
A. Parathormone
B. Calcitonin
C. Oxytocin
D. Both A and B
Correct option is: D (Both A and B).
23. The skeletal system of some invertebrates is outside of the body called___________ for-example_________.
A. Endoskeleton; arthropods
B. Exoskeleton; arthropods
C. Endoskeleton; echinoderms
D. Exoskeleton; echinoderms
Correct option is: B–Exoskeleton; arthropods
24. How many bones are there in axial skeleton?
A. 20 bones
B. 58 bones
C. 80 bones
D. 110 bones
Correct option is: C (80bones).
25. How many bones are there in appendicular skeleton?
A. 126 bones
B. 136 bones
C. 162 bones
D. 146 bones
Correct option is: A (126 bones).
26Cartilage is referred to as:
A. Soft bone
B. Hard bone
C. Hollow bone
D. None of these
Correct option is: A (soft bone).
27. There are how many facial bones in human body?
A. 15
B. 19
C. 12
D. 14
Correct option is: D (14 bones).
28. Total number of bones in skull are:
A. 28
B. 38
C. 22
D. 20
Correct option is: A (28).
29. Where is the hyaline cartilage found in the body?
A. At the ends of long bones
B. In the nose and ears
C. Trachea and bronchi
D. All of the above
Correct option is: D (all of the above).
30. How many vertebrae are there in vertebral column of human body?
A. 23 vertebrae
B. 30 vertebrae
C. 33 vertebrae
D. 43 vertebrae
Correct option is: C (33 vertebrae).
31. How many ribs are there in man?
A. 10 pairs
B. 12 pairs
C. 14 pairs
D. 16 pairs
Correct option is: B (12 pairs).
32. Human ear has three bones collectively called _________.
A. Stapes
B. Hyoid
C. Incus
D. Ossicles
Correct option is: D (ossicles).
33. Pectoral girdle consist of:
A. Arms
B. Legs
C. Skull
D. None of these
Correct option is; A (arms).
34. Largest bone in human body is :
A. Tibia
B. Fibula
C. Femur
D. Ulna
Correct option is: C (femur).
35. Cranium consist of how many bones?
A. 10 bones
B. 8 bones
C. 14 bones
D. None of these
Correct option is: B (8 bones).
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