NEET Human Physiology 2

Question 1

Which enzyme in saliva begins the digestion of starch?

Accepted Answer

Salivary amylase (Ptyalin)

Answer

Salivary amylase (ptyalin) in saliva begins breaking down starch into maltose in the mouth, initiating carbohydrate digestion.

Question 2

What is the role of the epiglottis in the human body?

Accepted Answer

Prevent food from entering the trachea

Answer

The epiglottis is a flap of cartilage that closes over the trachea during swallowing to prevent food and liquid from entering the airways.

Question 3

Which hormone is responsible for regulating blood glucose levels by lowering them?

Accepted Answer

Insulin

Answer

Insulin, secreted by beta cells of the pancreatic islets of Langerhans, facilitates glucose uptake by cells, lowering blood glucose levels.

Question 4

What is the process of gas exchange between blood and body cells called?

Accepted Answer

Internal (tissue) respiration

Answer

Internal (tissue) respiration refers to the exchange of O2 and CO2 between the blood capillaries and body cells at the tissue level.

Question 5

Which vessels carry blood away from the heart?

Accepted Answer

Arteries

Answer

Arteries carry oxygenated blood away from the heart to tissues (except the pulmonary artery, which carries deoxygenated blood to lungs).

NEET - National Eligibility cum Entrance Test Practice Test