Gaseous Exchange 💱

Question 1

Respiration

Answer 1

Complex process of oxidation reduction in which food is oxidized to release energy

Question 2

During respiration which is release as by product

Answer 2

CO2

Question 3

Gases exchange takes placed by the process of

Answer 3

Diffusion

Question 4

Source of oxygen called respiratory media for aquatic and terrestrial organisms are

Answer 4

Air and water 💦

Question 5

Which is the main source of oxygen on earth

Answer 5

Latter is the main source of oxygen on earth which contains about 21% oxygen

Question 6

Why it is more difficult for aquatic organisms to obtain oxygen

Answer 6

Because water is denser than air

Question 7

External waxy covering called ?

Answer 7

Cuticle

Question 8

The cutilarized epidermis of leaves has numerous pores called ?

Answer 8

Stomata

Question 9

Stomata is responsible for

Answer 9

Exchange of gases and evaporation of water

Question 10

Stoma is formed by two modified bean shaped ?

Answer 10

Guard cells

Question 11

Opening and closing of stomata depends upon

Answer 11

Turgidity of guard cells

Question 12

What is photorespiration

Answer 12

It is a metabolic process that occurs commonly in plants like wheat rice and sugarcane

Question 13

The plants in which photo respiration occurs are termed as

Answer 13

C3 plants

Question 14

During hot and dry days stomata are

Answer 14

Closed to conserve water

Question 15

During photosynthesis which enzyme is involved in catalyzing the fixation of carbon dioxide with RuBp to form an unsatavle hexose sugar ?

Answer 15

Rubisco

Question 16

When ribolose bi phosphate combines with oxygen which two products are formed ?

Answer 16

One molecule of phosphoglyceric acid ( PGA )and one molecule of phosphoglycolate

Question 17

What is the concentration of Oxygen and carbon dioxide outside or inside respiratory surface ?

Answer 17

There is greater concentration of Oxygen and lesser concentration of carbon dioxide outside the respiratory surface then inside 💠

Question 18

Properties of respiratory surfaces :

Answer 18

🐼Permeable
🐼 wet
🐼 thin
🐼 large surface area and relation to volume

Question 19

Respiratory organs of hydra

Answer 19

Diffusion by general body surface

Question 20

Respiratory organs of earthworm

Answer 20

⭐Wet skin as respiratory surface

⭐ Moisture is absorbed by mucus secreted from the goblet glands in the skin of earthworm

⭐ They have developed blood vascular system which can efficiently and rapidly transport respiratory gases within the body

Question 21

Respiratory organs of cockroach

Answer 21

They have special type of respiratory system called tracheal system

Question 22

Tracheal System consists of internal tubes called

Answer 22

Trachea

Question 23

Trachea consist of minute slit like pores known as

Answer 23

Spiracles

Question 24

Spiracles is divided into fine branches known as :

Answer 24

Tracheoles

Question 25

How many spiracles does cockroach have ?

Answer 25

10 pairs of spiracles on lateral sides of cockroach

🗞️ Two (2) lie in thoracic segments

🗞️ Eight (8) in first abdominal segments

Question 26

Blood vascular system in cockroach is :

Answer 26

Devoid of Haemoglobin

Question 27

Respiratory system of fish

Answer 27

🎠 Respiratory organs : Gills

🎠 Gills are outgrowth of pharynx

🎠In bony fishes —- Ventilation is brought about by combined effect of mouth and opercula

🎠 Gas exchange is also facilitated in gills due to counter current flow of water 💦 and blood

🎠 Countercurrent flow is very effective as it enables the fish extract up to 80% to 90% of oxygen from water that flow over the gills

🎠🎠🎠

Question 28

Respiratory organs of frog

Answer 28

✓frog has evolved vascularised paired out growth from the lower part of known as lungs

Question 29

Frog has :

Answer 29

Alveoli which are separated from each other through septum

Question 30

Site of exchange of gases are called

Answer 30

Alveoli

Question 31

In frog ventilation is

Answer 31

Single & two way path

Question 32

Incomplete ventilation

Answer 32

The type of ventilation does not allow the lungs to be completely empty or refill by air hence termed as incomplete ventilation

Question 33

What is an buccopharyngeal respiration

Answer 33

Change of gases through thin vascularized lining of buccal cavity

Question 34

When exchange of gases takes place on land through lungs is known as

Answer 34

Pulmonary respiration

Question 35

frog goes into water a burries itself in mud it exchange gases by its moist and highly vascularized thin skin this is known as

Answer 35

Cutaneous respiration

Question 36

Why are coming in lungs is always oxygen rich in birds ?

Answer 36

One way flow of air(unidirectional flow of air through mouth ) enables a bird to fly at very high altitude without any shortage of oxygen as the air coming in lungs is always oxygen rich

Question 37

The total capacity of human lungs is 5L . what percentage of air is filled when person takes deep breath ?

Answer 37

80%

Question 38

In frog 🐸 New air drawn into buccopharyngeal cavity through nostrils and old air retained under pressure in ?

Answer 38

Lungs