Breathing and Exchange of Gases Test 30

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Breathing and Exchange of Gases Test 30

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Question 1
1 / -0

In which part of the body, the blood is purified (oxigenation) ?

A
Heart

B
Atrium

C
Lungs

D
Ventricle

Solution

The lungs are responsible for the oxygenation (purification) of blood. In the lungs, alveoli are thin-walled structures and surrounded by numerous capillaries. At this site, the CO$$_2$$ from the blood is taken up by the alveoli and O$$_2$$ is replenished in the blood.
Thus, the correct answer is option C.
Question 2
1 / -0

Observe the given model that can be used to demonstrate the breathing mechanism in human beings.
Name the structures which can be compared to.

A
Lungs

B
Diaphragm

C
Trachea

D
Nostrils(Nose)

Solution

The given model is of lungs. There is a pair of lung present in the human body contain air sacs called alveoli. They are connected to trachea. Trachea is also called windpipe that connects the pharynx and larynx to the lungs.
So the correct answer is 'Lungs'.
Question 3
1 / -0

The CO$$_{2}$$ in the blood is mostly carried

A
By haemoglobin in RBC

B
In the cytoplasm of WBC

C
In the plasma as bicarbonate ions

D
By plasma proteins

Solution

Carbon dioxide is carried in the body in the following forms:
•7% of carbon dioxide is transported in the dissolved state in plasma.
•23% of carbon dioxide is transported as carbaminohaemoglobin in blood.
•70% of carbon dioxide is transported as bicarbonates in plasma.
Hence, maximum carbon dioxide is carried in blood in plasma as bicarbonate ions.
So, the correct answer is 'In the plasma as bicarbonate ions'.
Question 4
1 / -0

Tracheal respiration takes air to

A
Blood

B
Lungs

C
Body cavity

D
Tissues

Solution

The respiratory system consists of a network of the trachea, these thin tracheal branches carry oxygen from the air to the tissues. The opening of the spiracles is regulated by the sphincters. Exchange of gases takes place at the tracheoles by diffusion.
So the correct answer is 'Tissues'.
Question 5
1 / -0

At rest the volume of air that moves in and out per hour is called

A
Resting volume

B
Vital capacity

C
Lung capacity

D
Tidal volume

Solution

Tidal volume is the amount of air replaced during normal inhalation and exhalation when no extra effort is applied. It is 500ml in a normal healthy person.
So, the correct answer is option D.
Question 6
1 / -0

What is correct about breathing in adult Frog?

A
In water - skin, gills

B
In water - skin, buccal cavity

C
On land - skin, lungs, gills

D
On land - skin, buccal cavity
Solution
Frogs can live both on land and in freshwater and belong to class Amphibia of phylum Chordata.
Frogs respire on land and in the water by two different methods. In water, skin acts as a respiratory organ(i.e cutaneous respiration) by diffusion.
On land, the buccal cavity, skin and lungs act as the respiratory organs. The respiration by lungs is called pulmonary respiration. Hence, on land adult frog breathe with skin, buccal cavity.
So, the correct answer is 'on land skin, buccal cavity'.
Question 7
1 / -0

The medullary respiratory centre is directly affected

A
Chemically

B
Physically

C
Neuronally

D
None of these

Solution

Chemical regulation of breathing is part of the involuntary (autonomic) control of breathing. This mechanism is part of the bodies homeostasis to maintain an appropriate balance and concentration of CO₂, O₂, HCO₂^- and pH. There are two types of chemoreceptors that react strongly to a change in the blood gases: central and peripheral chemoreceptors. Central chemoreceptors are located on the ventrolateral surface of the medulla oblongata. They respond indirectly to blood pCO₂ but not to pO₂. CO₂ diffuses across the blood brain barier from blood to cerebral spinal fluid (CSF) while H⁺ and HCO₃^- are unable to.
So, the correct option is 'Chemically'.
Question 8
1 / -0

Given below are four matchings of an animal and its kind, of respiratory organ.
I. Silver fish - Trachea
II. Scorpion - Book lung
III. Sea squirt - Pharyngeal slits
IV. Dolphin - Skin
Which of them is true?

A
II and IV

B
Ill and IV

C
I and IV

D
I, ll and Ill

Solution

The respiratory organ of silverfish is trachea.
Book lung is the respiratory organ of scorpions.
Pharyngeal slits are the respiratory organs of sea squirt.
Like other mammals, the respiratory organ of dolphin is lungs.
So, the correct answer is option D.
Question 9
1 / -0

Which of the following statements is correct with respect to respiration?

A
Respiration can occur only when oxygen is available.

B
There are two types of respiration.

C
Respiration is also known as breathing.

D
All of the above

Solution

Respiration is of two types: aerobic and anaerobic respiration. Aerobic involves oxygen. On the other hand, in anaerobic respiration, respiration occurs in an environment where the oxygen is very less or absent. In both the processes, energy is produced for the organism. But, the energy produced by aerobic respiration is much higher than the energy produced through anaerobic respiration.
In higher organisms, respiration involves breathing (taking in oxygen-rich air and giving out carbon dioxide-rich air through nostrils) as well as cellular respiration.
So, the correct answer is option B.
Question 10
1 / -0

Type of respiration in Cockroach is

A
Cutaneous

B
Tracheal

C
Pulmonary

D
Brancheal

Solution

In cockroach respiratory system is well developed. The trachea plays a vital role in the transport of respiratory gases hence respiratory system is also called the tracheal system. The tracheal system includes;
a) Stigmata or spiracles
b) Trachea
c) Tracheoles.
So, the correct answer is 'Tracheal'.

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Breathing and Exchange of Gases Test 30

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Breathing and Exchange of Gases Test 30

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Question 1

Heart

Atrium

Lungs

Ventricle

Solution

Question 2

Lungs

Diaphragm

Trachea

Nostrils(Nose)

Solution

Question 3

By haemoglobin in RBC

In the cytoplasm of WBC

In the plasma as bicarbonate ions

By plasma proteins

Solution

Question 4

Blood

Lungs

Body cavity

Tissues

Solution

Question 5

Resting volume

Vital capacity

Lung capacity

Tidal volume

Solution

Question 6

In water - skin, gills

In water - skin, buccal cavity

On land - skin, lungs, gills

On land - skin, buccal cavity

Solution

Question 7

Chemically

Physically

Neuronally

None of these

Solution

Question 8

II and IV

Ill and IV

I and IV

I, ll and Ill

Solution

Question 9

Respiration can occur only when oxygen is available.

There are two types of respiration.

Respiration is also known as breathing.

All of the above

Solution

Question 10

Cutaneous

Tracheal

Pulmonary

Brancheal

Solution

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