Inspiration

Q.

Define breathing and explain the mechanism of breathing in human beings.

Q.

Question 6
Match the items in Column I with those in Column II:
$\begin{array}{cc}& \\ ColumnI& ColumnII\\ \left(a\right)Yeast& \left(i\right)Earthworm\\ \left(b\right)Diaphragm& \left(ii\right)Gills\\ \left(c\right)Skin& \left(iii\right)Alcohol\\ \left(d\right)Leaves& \left(iv\right)Chestcavity\\ \left(e\right)Fish& \left(v\right)Stomata\\ \left(f\right)Frog& \left(vi\right)Lungsandskin\\ & \left(vii\right)Tracheas\end{array}$

Q.

Describe the process of breathing.

Q.

What are the three important aspects about the overall chemical equation of respiration, pertaining to the following?’
(iii) Forms of energy liberated

Q. Explain mechanism of breathing stepwise with special mention on role of various muscles involved in breathing.

Q. Assertion :If two men, expire the same volume of air after normal inspiration, they have the same expiratory capacity. Reason: Expiratory capacity includes tidal volume and inspiratory reserve volume.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. State one function of each of the following:
Intercostal muscles

Q. Breathing involves 2 stages, inspiration and .

1. expiration
2. inhalation
3. diffusion

Q. With regard to the respiratory system and the process of respiration in man, answer the following question.
Name the two muscles that help in breathing.

Q. In mammals, ventilation movements of lungs are governed by

1. Diaphragm
2. Muscular wall of lungs
3. Intercostal muscles
4. Diaphragm and intercostal muscles

Q. Mark the correct pair of muscles involved in the normal breathing in humans.

1. External and internal intercostal muscles
2. Diaphragm and abdominal muscles
3. Diaphragm and external intercostal muscles
4. Diaphragm and intercostal muscles

Q. Which respiratory associated muscles would be contracted if you blow up a balloon?

1. Diaphragm contracts and internal intercostal muscles would relax
2. External intercostal muscle contract and phrenic muscles would contract
3. Internal intercostal and abdominal muscle would contract
4. Internal intercostal muscles are external intercostal muscles would contract

Q. Muscles attached to diaphragm contract during inspiration to make it.

1. Flat
2. Dome-shaped
3. Concave
4. Rotate

Q. During inspiration, muscles of diaphgram

1. Contracts
2. Expands
3. No effect
4. Coiled like string

Q. During inhalation, we take in air containing many gases but our body uses only oxygen. Which is the gas that is exhaled out?

1. Carbon dioxide
2. Carbon monoxide
3. Sulphur dioxide
4. (b) and (c) above.

Q. Consider the following four statements (i - iv) and select the correct option stating which ones are true (T) and which ones are false (F).
(i) Formation of oxyhaemoglobin occurs at the alveolar surface.
(ii) During gaseous exchange the gases diffuse from high partial pressure to low partial pressure.
(iii) Carbon dioxide cannot be transported by haemoglobin.
(iv) Earthworm respires through parapodia.

1. (i) T(ii)F(iii)T(iv)F
2. (i) F(ii)F(iii)T(iv)F
3. (i)T(ii)T(iii)F(iv)F
4. (i)F(ii)T(iii)F(iv)T

Q.

Identify the error(s) in the given statements.

During exhalation, ribs move upwards and outwards as the muscles relax.

Q. Tissue respiration is a type of

1. External respiration
2. Internal respiration
3. Encretion
4. Expiration

Q. During inspiration, air passes into lungs due to

1. Muscular expansion of lungs
2. Increase in volume of thoracic cavity and fall in lung pressure
3. Increased volume of thoracic cavity
4. Fall in pressure inside the lungs

Q. Inspiration is initiated by the contraction of?

1. Both a and b
2. External intercostal muscles
3. Internal intercostal muscles
4. Diaphragm

Q. With regard to the respiratory system and the process of respiration in man, answer the following questions:
Name the two muscles that help in breathing.

Q. Volume of thoracic chamber increases in the anteroposterior and dorsoventral axis in the human by?

1. Contraction of diaphragm and external intercostal muscles
2. Relaxation of diaphragm and external intercostal muscles
3. Relaxation of diaphragm and abdominal muscles
4. None of these