Question

Assertion:
Alveoli contain an extensive network of blood vessels.
Reason:
Alveoli is the site where exchange of gases occurs.

(a)Both assertion and reason are true and the reason is the correct explanation of the assertion.
(b)Both assertion and reason are true and reason is not the correct explanation of the assertion
(c)The assertion is true and the reason is false
(d)The assertion is false and the reason is true

Answer 1

Answer:

b) is the right answer ....100%

Answer 2

Both assertion and reason are true and the reason is the correct explanation of the assertion. (OPTION A)

ALVEOLI -

• Alveoli are tiny balloon-like sac-shaped structures.
• They help in the exchange of gases in the lungs.
• The alveoli are made of pneumocyte Type I and Type II cells.
• Type I cells are squamous cells lining the alveoli to increase the diffusion rate.
• Type II cells help in the reduction of surface tension y release of lamellar fluid.
• Alveoli contain an extensive network of blood vessels to facilitate the fast exchange of gases.