سہارا اور حرکت

Muscle contraction involves the sliding of:

• 1 Cellulose and chitin
• 2 Actin and myosin
• 3 Insulin and glucagon
• 4 Collagen and keratin

The energy for muscle contraction comes directly from:

• 1 Calcium alone
• 2 ATP
• 3 Water
• 4 Oxygen alone

Joints that allow movement in all directions are:

• 1 Hinge joints
• 2 Pivot joints only
• 3 Fixed joints
• 4 Ball and socket joints

Cartilage is found at the:

• 1 Inside red blood cells
• 2 Teeth only
• 3 Surface of the skin
• 4 Ends of bones in joints

Lack of calcium and vitamin D in children causes:

• 1 Beriberi
• 2 Night blindness
• 3 Rickets
• 4 Scurvy