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शनिवार, 22 जुलाई 2017

Class–VI (CHAPTER-08) BODY MOVEMENTS

Class–VI
(CHAPTER-08)
BODY MOVEMENTS
Question 1.Fill in the blanks:
(a)Joints of the bones help in the ————— of the body.
(b)A combination of bones and cartilages forms the ——— of the body.
(c)The bones at the elbow are joined by a ——– joint.
(d)The contraction and of the ———- pulls the bones during movement.
Answer: Fill in the blanks:
(a)Joints of the bones help in the movement of the body.
(b)A combination of bones and cartilages forms the skeleton of the body.
(c)The bones at the elbow are joined by hinge joint.
The contraction and of the muscles pulls the bones during movement.
Question 2.Indicate true (T) and false (F) among the following sentences.
(a)The movement and locomotion of all animals is exactly the same.
(b) The cartilages are harder than bones.
(c)The finger bones do not have joints.
(d)The fore arm has two bones.
(e)Cockroaches have an outer skeleton.
Answer: True/False (a)F, (b)F, (c)F, (d)T, (e)T
Question 3.Match the items in Column I with one or more items of Column II.
Column IColumn II
Upper jawhave fins on the body.
Fishhas an outer skeleton.
Ribscan fly in the air.
Snailis an immovable joint
Cockroachprotect the heart. Shows very slow movement. Have streamlined body.
Answer:
Column IColumn II
Upper jawIs an immovable joint.
FishHave fins, have a streamlined body.
RibsProtect the heart.
SnailShows very slow movement.
CockroachHave an outer skeleton, can fly in air.
Question 4.Answer the following:
(a)What is a ball and socket joint?
(b)Which of the skull bones are movable?
(c)Why can our elbow not move backwards?
Answer:
(a) The rounded end of bone fits into the cavity of the other bone. Such a joint allows movements in all directions.
(b)Lower jaw
(c)Elbow cannot move backwards because it has hinge joint which allows only back and forth movements.

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