AIIMS Zoology Locomotion And Movement Class 11 Questions

During vigorous exercise sufficient oxygen is not available to meet the required energy, so energy is derived through conversion of pyruvic acid to lactic acid.

Cervical vertebrae differ from other vertebra in having -

Choose the correct option for the labelling in the given diagram (A, B, C, D)

Myosin head separates from actin when:

Na and K concentration changes across the muscle cell membrane resulting in development of potential difference. So, Na and K ions are necessary for muscle contraction. Thus, both assertion and reason are true.

Haversian canal in the bone of mammals are connected by small blood vessel canal called

In old age, stiffness of joints is due to the

During muscular contraction, which of the following events occur? (i) H⁻zone disappears (ii) A band widens (iii) I band reduces in width (iv) Width of A band is unaffected (v) M line and Z line come closer.

Skeletal muscles appear striated due to presence of two characteristic proteins in alternating dark and light bands. Which of the following is a correct match of the protein with its light refractive property and colour? Protein Colour Property

Which of the following is correct about the given figure?

Which one of the following is a sesamoid bone?

The shoulder blade is made of

A cricket player is fast chasing a ball in the field. Which one of the following groups of bones are directly contributing in this movement?

Given diagram shows bone of the left human hindlimb as seen from front. It has certain mistakes in labeling. Two of the wrongly labeled bones are:

Which one of the following is a sesamoid bone?

If a stimulus, several times greater than the threshold stimulus is provided to a muscle fibre, it will:-

Sprain is due to excessive pulling of