Biology

Respiration and Gas Exchange

989 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

lungs : breathe :: brain :

  1. speak

  2. head

  3. think

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

This is a body part-function analogy: lungs are for breathing, and the brain is for thinking.

Multiple choice zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

Air entering lungs is $(1)$ Warmed $(2)$ Filtered $(3)$ Deprived of some oxygem $(4)$ Enriched with $CO _2$. What is true?

  1. $1, 2, 3$ and $4$
  2. $1$ and $2$
  3. $2$ and $4$
  4. $2$ and $3$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

As air enters the lungs, it is warmed by the nasal passages and filtered by cilia and mucus. It is not deprived of oxygen or enriched with CO2; rather, it is the process of gas exchange in the alveoli that performs those functions.

Multiple choice physics world of sounds characteristics of sound wave time period, frequency and amplitude of sound sound waves are longitudinal waves

The voices of Men, Women and children differ because of difference in their

  1. Lungs

  2. Wind pipr

  3. Vocal chords

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

Lungs are used to filter the oxygen from air .

Wind pipe provides a path for air to go inside the lungs .
Larynx is responsible for the production of sound .
Vocal cords are inside the larynx , and their thickness decides the frequency of sound (shrill or grave ) , by which we can differentiate between the voices of a man (grave) , women and children(shrill) .

Multiple choice zoology movement and locomotion in man bones and movements our skeletal system and the skin human skeleton system

In thoracic cavity of man which one is present

  1. Lungs only

  2. Lungs + Heart

  3. Lungs + heart + stomach

  4. Hearts only
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The thoracic cavity is also known as the chest cavity. It is a chamber in the body of the animal that is protected by the ribcage, skin and the muscles.
The essential organs that are present in the thoracic cavity are the lungs, the heart, a small part of the oesophagus and various lymph nodes and blood vessels.
So, the correct option is 'lungs+heart'
Multiple choice geography for a safer future disaster and management disaster management and precautionary measures disaster management: responding to disasters man made disaster tsunami and floods

What does CPR stands for?

  1. Cardio Pulmonary Resuscitation

  2. Cardio Pulse Reedem

  3. Calorie per rate

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

CPR stands for Cardiopulmonary Resuscitation, which is an emergency life-saving procedure performed when the heart stops beating.

Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

All of the following statements are true except

  1. Contraction of diaphragm increases volume of thoracic cavity in cephalocaudal axis

  2. During normal breathing, intrapleural pressure is always subatmospheric

  3. High surfave tention of alveolar surfactant facilities inhalation

  4. Passive exhalation results from elastic recoil of chest wall and lungs
Reveal answer Fill a bubble to check yourself
C Correct answer
Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

Given are the data on breathing rate, heart rate and body temperature of four different mammals A, B, C and D.

Animals Breathing Rate per min Heart Rate per min Body temperature $(^oC)$
A $160$ $500$ $36.5$
B $15$ $40$ $37.2$
C $28$ $190$ $38.2$
D $8$ $28$ $35.9$

Study the data and rank theses animals in descending order of surface area per unit volume?

  1. A $>$ B $>$ C $>$ D
  2. D $>$ B $>$ A $>$ C
  3. A $>$ C $>$ B $>$ D
  4. B $>$ D $>$ C $>$ A
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

Read the following statements.
$(1)$ Chest expands because air enters into the lungs.
$(2)$ Air enters into the lungs because chest expands.
$(3)$ The muscles of the diaphragm contracts because air enters in the lungs.
$(4)$ A healthy human breathes $12-16$ times/minute.

  1. Four

  2. Three

  3. Two

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

Statement (2) is correct because the chest expands, lowering intrapleural and intrapulmonary pressure, which causes air to enter. Statement (4) is correct since a healthy human typically breathes 12 to 16 times per minute. Statements (1) and (3) incorrectly reverse cause and effect.

Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

Which of the following statements is not correct?

  1. Taking in of oxygen is inhalation.

  2. Taking in of carbon dioxide is inhalation.

  3. Breathing rate is number of inhalation and exhalation in one minute.

  4. Giving out of carbon dioxide is exhalation.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • Respiration includes two processes: inhalation and exhalation.
  • Inhalation (also known as inspiration) occurs when air or other gases enter the lungs.
  •  And exhalation is the process by which the body expels carbon dioxide. Hence, Taking in of carbon dioxide is inhalation is a wrong statement.
So, the correct answer is 'Taking in of carbon dioxide is inhalation'.

Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

The act of breathing air into the body with the help of lungs is called

  1. Ingestion

  2. Inhalation

  3. Exhalation

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

The act of breathing air into the body the help of lungs is called inhalation. By this process, fresh air enters into the lungs that contain large amount of oxygen.

So the correct answer is 'Inhalation'.

Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

Which of the following maintains the volume of air in the chest cavity during breathing?

  1. Diaphragm

  2. Lungs

  3. Breastbone

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

The diaphragm is a dome-shaped, muscular and membranous structure that separates the chest and abdominal cavities in mammals. It is the principal muscle of respiration that maintain the volume of air in the chest cavity during breathing.

So the correct answer is 'Diaphragm'.