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Assertion: Ciliary movement occurs in most of our internal tubular organs which are lined by ciliated epithelium. Reason: Passage of ova through the female reproductive tract is also facilitated by the ciliary movement.

Assertion: All locomotions are movements but all movements are not locomotion. Reason: Movement is one of the significant features of living beings.

Assertion: Ball and socket joints are the most mobile joints. Reason: Synovial fluid is present here in synovial cavity such arrangement allows considerable movement.

Assertion: Arthritis or inflammation of a joint makes the joint painful. Reason: Some toxic substances are deposited at the joint.

Assertion: Movement of body parts serves to change the body posture. Reason: Body parts move in relation to the body axis.

Assertion: There are similarities between the locomotion of unicellular organisms and multicellular animal. Reason: Ciliary, flagellar and amoeboid movement occur in unicellular organisms.

Assertion: White muscle fibres have very less quantity of myoglobin. Reason: White muscle fibres have high number of sarcoplasmic reticulum.

Assertion: Skeleton helps in the blood cell formation. Reason: Blood flows through skeleton.

Assertion: Muscle contraction force increases with rise in strength of stimulus. Reason: This is due to increased contraction of individual muscle fibres with increase in stimulus strength.

Assertion: Muscle as a whole doesn't obey all or none law. Reason: Each muscle fibre contracts maximally whenever it contracts.