Exchange of Gases

Q.

How many ATP molecules are produced in the Krebs cycle?

1. Glucose is converted in CO₂

2. ADP is converted to ATP

3. Pyruvic acid is converted to CO₂

4. Pyruvic acid is converted to ATP

Q. What is the function of the alveoli?

Q.

The first step of cellular respiration involves the breakdown of glucose into a three-carbon compound called pyruvate.

The described step occurs in which part of the cell?

1. Cytoplasm

2. Vacuole

3. Nucleus

4. Mitochondria

Q.

What is recycled in ATP cycle?

Q.

In the alveoli, the partial pressure of O₂ is ____i_____ mm Hg, while the partial pressure of CO₂ is ____ii_____ mm Hg.

The information in which alternative completes the given statement?

1. 

2. 

3. 

4. 

Q.

How many ATP does 1 glucose contain

Q.

Air moves out of the lungs when the pressure inside the lungs is ___.

1. greater than the pressure in the atmosphere

2. greater than the intra-alveolar pressure

3. less than the pressure in the atmosphere

4. equal to the pressure in the atmosphere

Q.

The correct sequence of anaerobic respiration in yeast is

1. Glucose $\stackrel{Cytoplasm}{\to }$Pyruvate $\stackrel{Mitochondria}{\to }$Ethanol $+$ Carbon dioxide

2. Glucose $\stackrel{Cytoplasm}{\to }$Pyruvate $\stackrel{Cytoplasm}{\to }$Lactic Acid

3. Glucose $\stackrel{Cytoplasm}{\to }$Pyruvate$\stackrel{Mitochondria}{\to }$Lactic Acid

4. Glucose $\stackrel{Cytoplasm}{\to }$Pyruvate $\stackrel{Cytoplasm}{\to }$Ethanol $+$ Carbon dioxide

Q.

Which of these explain(s) the diffusion of oxygen from alveoli to blood?

1. Low concentration of oxygen in the blood.

2. Low concentration of oxygen in the alveoli.

3. High concentration of oxygen in the alveoli.

4. High concentration of oxygen in the blood.

Q. is a process in which glucose is broken down in the cell to release energy.

1. Breathing
2. Cellular respiration
3. Inhalation
4. Exhalation

Q.

Pyruvic acid is formed during

1. Kreb's cycle

2. Glycolysis

3. Ornithine cycle

4. Calvin cycle

Q. The pharynx opens into the larynx by a slit-like aperture called _______.

1. bronchus
2. glottis
3. trachea
4. epiglottis

Q.

During inspiration, the concentration of oxygen inside the alveoli is_______ that in blood capillaries.

1. less than

2. more or less than

3. more than

4. same as

Q.

Gas is exchanged in the alveoli by a process of _____.

1. Simple diffusion

2. Active transport

3. Facilitated diffusion

4. Filtration

Q.

The exchange of gases between the alveoli and blood in the lungs, as well as between blood and tissue, depends on

1. partial pressure of the gases

2. pressure and the diffusion capacity of the gases

3. pressure of the gases

4. diffusion capacity of the gases

Q. 1 molecule of Haemoglobin carries .........( 1) ........ molecule/s of oxygen, but 1 molecule of Myoglobin carries .........( 2) ........molecule/s of oxygen. 1 gm. of haemoglobin carries......... (3) ........ ml. of oxygen, and 100 ml. of blood carries......... (4) ........ ml. of oxygen. The partial pressure of $C{O}_2$, in arterial and venous blood is .........( 5) ........ and .........( 6)............, whereas the partial pressure of $O_2$, in arterial and venous blood is ........ .(7).. ...... and ........ .(8) ........ Maximum $O_2$ is carried through ......... (9) ........ of blood while maximum $C{O}_2$ is carried through ......... (10) ........ of blood.

Q. Explain the part of cellular respiration that produces less amount of energy.

Q. In earthworm dorsal blood vessel and collecting channel are located

1. Behind ${14}^{th}$ segment
2. Anterior to ${13}^{th}$ segment
3. Throughout the segmented body
4. In typhlosolar region

Q.

The exchange of gases between inhaled air and blood is referred as ___.

1. cellular respiration

2. external respiration

3. internal respiration

4. circulatory respiration

Q. What is alveoli ? Explain it with diagram.

Q. People living at sea level have around 5 million $RBCs/m{m}^3$ of blood whereas those living at an altitude of 5400 m have around 8 million. This is because

1. There is more UV radiation which enhances RBCs production
2. People eat more nutritive food which helps in formation of more RBCs
3. People get pollution free air to breathe with more oxygen becoming available
4. Atmospheric $O_2$ level is less so that more RBCs are needed to absorb the required amount of $O_2$ to survive.

Q. The main organs responsible for respiration are:

1. Stomach
2. Lungs
3. Trachea
4. Pharynx
5. Alveoli
6. Capillaries
7. Intestines
8. Bronchi

Q.

Which of these gases are mostly transported by binding to hemoglobin?

1. Carbon dioxide
2. Carbon monoxide
3. Nitrogen
4. Oxygen

Q. Tracheal rings of which vertebrate are not of hyaline cartilage but of calcified?

1. Birds
2. Reptiles
3. Mammals
4. Both (B) and (C)

Q. The percentage of oxygen in the inhaled air is _____.

1. 18
2. 16
3. 21
4. 12

Q. In the respiratory system, rings of cartilage are found in .

1. lungs
2. alveoli
3. trachea
4. diaphragm

Q.

The atmospheric pressure of oxygen ______ with an increase in altitude.

1. decreases

2. increases

3. remains constant

4. slightly changes

Q. Complete the pathway of the passage of air.

Q. Inorder to hold their breath for a long time, free divers hyperventilate to decrease $C{O}_2$ level in blood.

1. True
2. False