Locomotion and Movement - I (Class XI )

Cilia are short, fine, vibratile hair-like processes present on the free surface of cells. They create a current in water by means of their oar-like activity and help in movement of cells.

Deltoid muscles are abductor type of muscles that are cylindrical and ribbon-like.

It is the layer of connective tissues that surrounds the muscle fibres.

Latissimus dorsi is an adductor muscle which brings the arms towards the body.

Adductor muscles bring the limbs towards the axis of the body.

They are densely stained transverse lines which separate the sarcomeres.

They are abductor type of muscles. They pull the arms away from the body.

Also known as Bowditch's law, it states that the response of a muscle fibre to a stimulus is not proportionate to its intensity.

This type of muscle rotates a part of the body.

It is the stiffening of the body after death. It is caused by non-separation of actin myosin complex due to the non-availability of ATP/CTP.

It is an elevator type of muscle which raises the lower jaw upwards to close the mouth.

It is the largest muscle present in the buttocks.

It is the degeneration of muscles that is caused due to a genetic disorder. It is incurable.

Evertor type of muscles turn the sole outwards.

Study of movement and locomotion is called kinesiology.

It is a visceral bone found in the heart of a deer.

Incus is the anvil-shaped middle bone of the ear ossicles which helps in amplification of sound by 20-22 times.

Hyoid bone lies at the base of tongue and above the larynx and is also known as tongue bone.

These bones develop through calcification of cartilage.

It is a heterotypic bone formed in the eyelids of crocodile.

Antbear is an exception in mammals as it has eight cervical vertebrae.

It is a bone formed by the ossification of the tendons.