Support And Movement (Chapter No.16) - MCQs - Biology Book Two (English) - Class 2nd Year (XII or 12th) Science Group

Go To Index
Chapter No.16
Support And Movement

Multiple Choice Questions

1. Encircle the correct choice:
i) The type of bone cell that tears down bone during the building and remodelling process are:
a) Osteocytes
b) Osteoblasts
c) Osteoclasts ✔
d) Bone lining cells

ii) During bone formation, as the periosteum calcifies. it gives rise to a thin plate of compact bone called:
a) Periosteal bud
b) Periosteal bone collar ✔
c) Primary ossification center
d) Epiphyseal plate

iii) The ring like shape of the girdle is due to the joining of coxal bone with the sacrum of vertebral column at anterior side and below by a joint in between pubic part called:
a) Pubic symphysis ✔
b) Iliac junction
c) Pelvic symphysis
d) Syndesmosis

iv) Cartilage is a soft flexible form of connective tissue Surrounded by a layer called:
a) Myocardium
b) periosteum
c) Osteoderm
d) Perichondrium ✔

v) An antagonist muscle is relaxed while the other side opposite to antagonist muscle:
a) Contracted ✔
b) Relaxed
c) No change
d) Extremely relaxed

vi) The stage when old bone tissues are removed and gets replaced with new ones that joins both fractured sides called:
a) Bone remodeling stage ✔
b) Bone callus formation
c) Cartilaginous callus formation
d) Hematoma formation

vii) Which is related to the mild to severe grade of stretching or tearing of a ligament that holds the bones of a joint together?
a) Spasm
b) Tetany
c) Sprains ✔
d) Cramps

viii) Muscle fiber are gathered in many groups each group of fibers is called a fascicle which is surrounded by a membrane called:
a) Sarcolemma
b}Perimysium ✔
c) Endomysium
d) Epimysium

ix) The heart muscles arranged in a branching network where cells are joined together and making a:
a) Syncytium ✔
b) Sarcoplasmic reticulum
c) Endoplasmic reticulum
d) T-tubules

x) These joints hold the bone by dense connective tissue contain collagenous fibers:
a) Fibrous joints ✔
b) Syndesmosis
c) Gamphosis
d) Synovial joints


Important Points To Remember:

• Human skeleton acts as a framework of the body.
• The study of human bones is called osteology. 
• Bone has distinct regions called epiphysis, diaphysis and metaphysis and covered by different layers.
• Bones and cartilage are composed of numerous cells.
• Different types of cartilages are located in skeleton and plays vital role in protecting joints.
• Human skeleton is formed by numerous bones and has two major divisions called axial and appendicular skeleton which include separate bones.
• Bones are joined to form different joints.
• The major groups of joints are called fibrous, synovial and cartilaginous joints.
• The common disorders of the skeletal system are disc slip, spondylosis, sciatica, and arthritis.
• Repair of several types of bone fracture takes place m different steps in sequence i.e., hematoma formation, internal and external callus formation, replacement of cartilage by trabecular bone and remodeling.
• First-aid treatment is also used for the injuries in joints like dislocation and sprain.
• There are three types of muscles in the body that perform movement.
• Skeletal muscles are present in organs that work voluntarily.
• Non-skeletal muscles  are present in organs that work in involuntary organs.
• Cardiac muscles  are present in heart.
• Skeletal muscle fiber contains numerous myofibril.
• Myofibril contain two kinds of protein filaments namely actin and myosin.
• Actin and myosin filaments are cross linked and perform muscles contraction.
• Out to abnormal muscle contraction teeny and cramps takes place.
• ADP stands for Adenosine diphosphate.
• ATP stands for Adenosine triphosphate.
• 'A' band stands for Anisotropic band.
• 'I' band stands for Isotropic band.
• "H" zone stands for Helle Zone.
• "M" line or Disc stands for Myomesin line or disc.
• (Tn-C) stands for Troponin C.
• (Tn-I) stands for Troponin I.
• (Tn-T) stands for Troponin T.
• "Z" line or Disc stands for Zwischen line or disc.