Biology Questions

During respiration, about 97% of oxygen is transported by Red Blood Cells in blood and the remaining 3% gets dissolved in the plasma.Around 20-25% of carbon dioxide is carried by haemoglobin as carbamino-haemoglobin.

Oxygen enters the blood from the lungs and carbon dioxide is expelled out of the blood into the lungs. The blood serves to transport both gases. Oxygen is carried to the cells. Carbon dioxide is carried away from the cells.

Fat-soluble vitamins except are the vitamins that are not soluble in water and are only absorbed when taken with higher fat food.

There are 4 types of fat soluble vitamins. They are :

• Vitamin A
• Vitamin D
• Vitamin E
• Vitamin K

Water soluble vitamins are Vitamin B and Vitamin C.

Graded potentials are changes in membrane potential that vary in size, as opposed to being all-or-none.

In the given options, They increase amplitude as they move away from the stimulus point is not true about the graded potentials.