Breathing and Exchange of Gases MCQ

Breathing and Exchange of Gases MCQ/Objective questions Chapter 17 Biology

Exchange of gases in earthworm takes place through

  • a. Cuticle
  • b. Tracheal tubules
  • c. Gills
  • d. Lungs
a. Cuticle

Coelontrates, sponges, flatworms and other lower vertebrates exchange gases through

  • a. Cuticle
  • b. Tracheal tubules
  • c. Gills
  • d. Body surface
d. Body surface

Which organ aquatic arthropuds and molluscs use to exchange gases?

  • a. Cuticle
  • b. Tracheal tubules
  • c. Gills
  • d. Body surface
c. Gills

A surfactant that prevents collapsing of alveoli is

  • a. Pectin
  • b. Lecithin
  • c. Cellulose
  • d. None
b. Lecithin

‘c’ shaped ring that prevent collapse of tracea is made up of

  • a. Elastic cartilage
  • b. Hyaline cartilage
  • c. Fibrous cartilage
  • d. None
b. Hyaline cartlage

Air passes into trachea from pharynx via

  • a. Mouth
  • b. Larynx
  • c. Epiglottis
  • d. None
b. Larynx

Cartilaginous box which helps in sound production is

  • a. Mouth
  • b. Lung
  • c. Pharynx
  • d. Larynx
d. Larynx

Thin sac like vascularised structure present in the lungs is

  • a. Tracheole
  • b. Branchiole
  • c. Alveoli
  • d. trachea
c. Aleveoli

Lung is surrounded by pleural membrane which contains:

  • a. Water
  • b. Pleural fluid
  • c. Air
  • d. None

Cardiac notch is present in

  • a. Right lung
  • b. Left lung
  • c. Both lungs
  • d. None
b. Left lung

Which tissue makes the alevoli of lungs?

  • a. Simple squamous
  • b. Simple cuboidal
  • c. Simple columnar
  • d. None
a. Simple squamous


The amount that we breathe in or breath out during natural breathing is

  • a. Expiratory Reserve Volume (ERV)
  • b. Inspiratory Reserve Volume (IRV)
  • c. Tidal Volume (TV)
  • d. Vital capacity (VC)
c. Tidal Volume (TV)

Volume remain in the lungs after forceful expiration is:

  • a. TV
  • b. VC
  • c. Reserve volume (RV)
  • d. Function Residual Capacity (FRC)
c. Reserve volume (RV)

Total lung capacity is

  • a. Vital capacity + Reserve capacity
  • b. Vital capacity – Reserve capacity
  • c. Tidal volume + Reserve volume + Inspiratory reserve volume
  • d. None
a. Vital capacity + Resserve capacity

The only vein that carry oxygenated blood is

  • a. Renal vein
  • b. Hepatic vein
  • c. Pulmonary vein
  • d. None
c. Plumonary vein

The only artery that carries impure/deoxygenated blood is:

  • a. Renal artery
  • b. Sinusoidal artery
  • c. Pulmonary artery
  • d. None
c. Pulmonary artery

Breathing and Exchange of Gases MCQWhich molecule among these have higher affinity for haemoglobin

  • a. CO2
  • b. O2
  • c. CO
  • d. All   three
c. CO

Respiratory rhythem centre in brain which regulate rate of respiration is a part of:

  • a. Cerebrum
  • b. Cerebellum
  • c. Medulla oblongata
  • d. None
c. Medulla oblongata

A region in pons which regulate respiratory rhythemcentre is

  • a. Chemotriggerzone
  • b. Pneumotaxis center
  • c. Hypothalamus
  • d. None
b. Pneumotaxis centre

Promininet cause of emphysema is

  • a. Malnutrition
  • b. Poor hygiene
  • c. Cigarette smoking
  • d. Adverse drug reaction
c. Cigarette smoking

Read also:

Digestion and Absorption MCQ

Plant Growth and Development MCQ

Respiration in Plants MCQ

Photosynthesis in Higher Plants MCQ

Breathing and Exchange of Gases MCQ/Objective questions Chapter 16 Biology

Ref: Chapter 17.

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