Question

Answer the following in short :-

1. Define breathing.

2. What is respiration?

3. What are guard cells?

4. Name one artery which brings deoxygenated blood from the heart.

5. What is ascent of sap?​

Answer 1

Answer :-

★ Answer the following in short :-

1. Define breathing.

➮ Breathing: Breathing is is a mechanical process of inhaling and exhaling air which doesn't involve any enzymes.

2. What is respiration?

➮ Respiration: Respiration is a complex biochemical process in which enzymes are involved. Energy is released and stored in form of ATP.

3. What are guard cells?

➮ Gases are exchanged through small openings on the leaves called stomata. Each stoma has two bean-shaped cells called guard cells.

4. Name one artery which brings deoxygenated blood from the heart.

➮ Pulmonary artery is a artery which brings deoxygenated blood from the heart.

5. What is ascent of sap?

➮ Ascent of sap: The upward movement of water and minerals from roots to the top of plant is called ascent of sap.

More Information

Some more information related to respiration and guard cells :-

• Respiration are of two types :-

1. Aerobic respiration
2. Anaerobic respiration

• In respiration, energy is released and stored in the form ATP.
• The inner walls of the guard cells are thicker than the outer walls. When, they swell and bulge outwards and the stomata opens whereas when the guard cells lose water they lose their turgidity and the stomata closes.
• ATP = Adenosine Triphosphate.