Breathing and Exchange of Gases

Question 1

Animal Phylums which shows simple diffusion of gases over body surface.

Answer 1

Sponges,Coelenterates,Flatworms

Question 2

Till which component of the conducting part is supported by incomplete cartilaginous rings.

Answer 2

Trachea—–> initial Bronchioles

Question 3

Describe a Alveoli.

Answer 3

Terminal Bronchiole give rise to very thin, irregular walled and vascularised bag like structure called the Alveoli.

Question 4

the Trachea Branches into bronchi at the level of…

Answer 4

5th Thoracic Vertebrae.

Question 5

The conducting part-Components and Functions?

Answer 5

Ext Nostrils—>Terminal Bronchioles
-transport
-clears any foreign particles
-humidifies
-bring air to the body temp.

Question 6

The 5 Steps of Respiration?

Answer 6

-Breathing(pulmunary ventilation)
-Exchange of gases along the alveolar surface
-transport of gases via Blood
-exchange of gases with cells/tissues
-use of O2 for catabolism and resultant release of co2.

Question 7

Healthy Human breaths ——times/minute

Answer 7

12-16 times/minute

Question 8

Healthy Human breaths ——times/minute

Answer 8

12-16 times/minute

Question 9

PO2 and PCO2 @ alveoli

Answer 9

Po2=104
Pco2=40

Question 10

PO2 and PCO2 @ Atm.Air

Answer 10

Po2=159
Pco2=0.3

Question 11

PO2 and PCO2 @Deoxy.Blood

Answer 11

Po2=40
Pco2=45

Question 12

PO2 and PCO2 @Oxy.Blood

Answer 12

Po2=95
Pco2=40

Question 13

PO2 and PCO2 @Tissues

Answer 13

Po2=40
Pco2=45

Question 14

Solubility of Co2 is higher than that of O2 by ——-times?

Answer 14

20-25 times
(The amount diffusion of co2 per unit difference in partial pressure is higher for Co2)

Question 15

The 3 layers of alveolar diffusion surface.

Answer 15

-thin squamous epithelium of Alveoli
-the basement substance between them
-endothelium of alveolar capillaries

Question 16

% of O2 transported bound in haemoglobin

Answer 16

97%

Question 17

% O2 transported as dissolved in Blood plasma

Answer 17

3%