Sigmoid notch is formed by

• cavity formed by humerus

• cavity formed by radius-ulna

• cavity formed by tibia-fibula

• cavity formed by femur

An acromian process is characteristically found in the

• pelvic girdle of mammals

• skull of frog

• pectoral girdle of mammals

• sperm of mammals

During strenuous excercise, glucose is converted into

• glycogen

• pyruvic acid

• starch

• lactic acid

One animal that does not perform locomotion is

• Sycon

• Nereis

• Sepia

• Euglena

Spindle fibre is made up of

• tubulin

• humulin

• intermediate filament

• flagelin

Ligament is mainly made up of

• reticulin

• elastin

• myosin

• collagen

In rabbit, end of a long bone is connected in another by

• tendon

• ligaments

• muscle

• cartilage

Action potential is generated by

• Na⁺

• K⁺

• Ca⁺

• Cl^-

Which of the following is a transparent tissue?

• Tendon

• Fibrous cartilage

• Hyaline cartilage

• All of these

Which of the following is important for muscle contraction and nerve impulse transmission?

• Ca²⁺ ions

• Mg²⁺ ions

• Both (a) and (b)

• Fe²⁺ ions