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Biology > Gaseous Exchange 💱 > Flashcards

Gaseous Exchange 💱 Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

Respiration

A

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

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2
Q

During respiration which is release as by product

A

CO2

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3
Q

Gases exchange takes placed by the process of

A

Diffusion

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4
Q

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

A

Air and water 💦

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5
Q

Which is the main source of oxygen on earth

A

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

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6
Q

Why it is more difficult for aquatic organisms to obtain oxygen

A

Because water is denser than air

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7
Q

External waxy covering called ?

A

Cuticle

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8
Q

The cutilarized epidermis of leaves has numerous pores called ?

A

Stomata

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9
Q

Stomata is responsible for

A

Exchange of gases and evaporation of water

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10
Q

Stoma is formed by two modified bean shaped ?

A

Guard cells

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11
Q

Opening and closing of stomata depends upon

A

Turgidity of guard cells

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12
Q

What is photorespiration

A

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

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13
Q

The plants in which photo respiration occurs are termed as

A

C3 plants

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14
Q

During hot and dry days stomata are

A

Closed to conserve water

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15
Q

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

A

Rubisco

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16
Q

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

A

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

17
Q

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

A

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

18
Q

Properties of respiratory surfaces :

A

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

19
Q

Respiratory organs of hydra

A

Diffusion by general body surface

20
Q

Respiratory organs of earthworm

A

⭐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

21
Q

Respiratory organs of cockroach

A

They have special type of respiratory system called tracheal system

22
Q

Tracheal System consists of internal tubes called

A

Trachea

23
Q

Trachea consist of minute slit like pores known as

A

Spiracles

24
Q

Spiracles is divided into fine branches known as :

A

Tracheoles

25
Q

How many spiracles does cockroach have ?

A

10 pairs of spiracles on lateral sides of cockroach

🗞️ Two (2) lie in thoracic segments

🗞️ Eight (8) in first abdominal segments

26
Q

Blood vascular system in cockroach is :

A

Devoid of Haemoglobin

27
Q

Respiratory system of fish

A

🎠 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

🎠🎠🎠

28
Q

Respiratory organs of frog

A

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

29
Q

Frog has :

A

Alveoli which are separated from each other through septum

30
Q

Site of exchange of gases are called

A

Alveoli

31
Q

In frog ventilation is

A

Single & two way path

32
Q

Incomplete ventilation

A

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

33
Q

What is an buccopharyngeal respiration

A

Change of gases through thin vascularized lining of buccal cavity

34
Q

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

A

Pulmonary respiration

35
Q

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

A

Cutaneous respiration

36
Q

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

A

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

37
Q

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

A

80%

38
Q

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

A

Lungs

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