Biology

Respiration and Gas Exchange

958 Questions

Access a targeted set of questions on respiration and gas exchange for competitive exams. Topics include lung volumes, the mechanism of breathing, and respiratory anatomy. Understanding these physiological processes is essential for scoring well.

Lung volumes and capacitiesBreathing mechanismsRespiratory anatomyGas exchange processes

Respiration and Gas Exchange Questions

Multiple choice zoology respiratory system phases in respiration human respiratory system parts of respiration

Abdominal breathing refers to

  1. Normal breathing

  2. Slow breathing

  3. Fast breathing

  4. Voluntary breathing
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Diaphragmatic or abdominal breathing is the normal pattern of breathing at rest: the abdomen protrudes as the diaphragm is lowered. It is done by contracting the diaphragm, a muscle located horizontally between the chest cavity and stomach cavity. Air enters the lungs and the belly expands during this type of breathing.This deep breathing is marked by expansion of the abdomen rather than the chest when breathing.

Multiple choice zoology respiratory system phases in respiration human respiratory system parts of respiration

If a respiratory surface dries out, gas exchange will 

  1. Increase

  2. Decrease

  3. Stop

  4. Not be affected
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The respiratory surface needs moisture for maximum efficiency. Oxygen from the air dissolves in the water on the surface momentarily and this allows the oxygen more time to cross the alveolar membrane. If the surface dries out, gas exchange will happen at a very reduced rate since fast-moving gaseous oxygen molecules do not efficiently cross the alveolar membrane. The reduced gas exchange is mostly likely not enough to support blood oxygenation for vital functions. 

Therefore, the correct answer is option B.

Multiple choice bio-chemistry immunology disease and its treatment manifestation and treatment of disease treatment of disease

The mucus trapped in the respiratory tract can be removed by the help of

  1. Aloe vera

  2. Honey

  3. Lemon

  4. Baking soda
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lemon treats many infections caused by bacteria, especially respiratory infection. It helps to remove the mucus accumulated in the respiratory tract. It has low pH which prevents the proliferation of bacteria.

So, the correct answer is option C.

Multiple choice botany movement in and out of the cell diffusion transport in vascular plants types of transport

Which of the following features does all gas exchange have in common?

  1. They are enclosed within ribs.

  2. They are maintained at constant temperature.

  3. The exchange surfaces are moist.

  4. They are exposed to air.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Out of all the options given the third option is the correct one.
Exchange of gases is a feature that is common in all living things. Irrespective of the genera of living organisms,  all organs that exchange gases are characterized by features such as- thin, moist, large surface area and a large capillary network.

Multiple choice zoology skeleton and movements features of a muscle muscle features muscle contraction and its effects

Panting after vigorous exercise is due to

  1. Oxygen debt

  2. Continuity of deep breathing even after exercise

  3. Continuity of mouth breathing started during exercise

  4. Requirement of rapid dissipation of energy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • During a vigorous physical exercise, lactic acid and carbon dioxide are formed in the muscles of the body.
  • The production of lactic acid can be prevented by the flow of required oxygen to the muscles thus, our body uses more oxygen than replenished.
  • Therefore, after a vigorous exercise people pant due to to decrease in the oxygen level in the body.
  • So, the correct answer is 'Oxygen debt'.
Multiple choice biology infectious diseases pathogen and their mode of transmission some infectious diseases diseases and immunity health and diseases

.......... stage of TB does not show any symptoms.

  1. Pulmonary

  2. Latent

  3. Active

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Latent TB is the condition in which you have a TB infection, but the bacteria remain in your body in an inactive state and cause no symptoms. Latent TB, also called as an inactive TB or TB infection, is not contagious. It can turn into active TB, so treatment is important for the person with latent TB and to help control the spread of TB in general.

Thus, the correct answer is option B.

Multiple choice biology infectious diseases pathogen and their mode of transmission some infectious diseases diseases and immunity health and diseases

.......... do not affect the lungs of the pateint.

  1. Pulmonary TB

  2. Extrapulmonary TB

  3. Lymph node TB

  4. Abdominal TB
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Extrapulmonary TB refers to TB that occurs in areas outside the lungs, such as the lymph nodes, bones, or abdomen, therefore it does not primarily affect the lungs.

Multiple choice biology biology : an introduction introduction to organization of life signs of life what is living?

The process of taking in and giving out of the air is known as 

  1. Breathing

  2. Inhaling

  3. Exhaling

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Breathing is process of taking in and giving out of the air for exchange of gases between the internal of body and the external environment. The taking in of air is called as inhalation and giving out of air is called exhalation. It is an important part of respiration and can be done by various organs like nose, skin, gills.
Hence the correct option is A "breathing".
Multiple choice biology breathing and respiration regulation of breathing human respiratory system contro and disorders of respiration

Choose the correct answer from the alternatives given.
The structure which does not contribute to breathing movements in mammals is

  1. ribs

  2. diaphragm

  3. larynx

  4. abdominal muscles
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The process of breathing is divided into two phases: inspiration (inhalation) and expiration (exhalation). The diaphragm, ribs, external, the internal intercoastal muscles and the abdominal muscles that move the diaphragm are all involved in changing the size of the thoracic cavity either by contraction or relaxation thereby changing the air pressure and causing air to move in or out of the lungs. So, the correct option is 'larynx'.

Multiple choice zoology the respiratory system regulation of breathing human respiratory system contro and disorders of respiration

Lungs lie in the thoracic cavity separated by ............ from the abdominal cavity.

  1. Septum

  2. Diaphragm

  3. Thoracic cage

  4. Ribs
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The diaphragm separates the thoracic cavity, containing the heart and lungs, from the abdominal cavity and performs an important function in respiration. As, the diaphragm contracts, the volume of the thoracic cavity increases and air is drawn into the lungs.  It is a dome-shaped sheet of muscle that is inserted into the lower ribs.