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 evs bones joints in the human body our skeletal system and the skin joints

Choose the correct answer from the alternatives given.
What is the synovial membrane which protects lungs from friction against abdominal wall?

  1. Pleura

  2. Mesentery

  3. Alveolar septum

  4. Tracheal bifurcation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The pleura refers to the two membranes that cover the lungs. The space between the two membranes is called the pleural cavity. It is filled with a thin, lubricating liquid called pleural fluid, which acts as a lubricant and allows the pleurae to slide effortlessly against each other by reducing friction during respiratory movements. So, the correct option is 'pleura'.

Multiple choice biology human system gas exchange and smoking gas exchange gas exchange in humans

Respiration is the physiological process in which

  1. Breathing occurs

  2. Breathing and external respiration occurs

  3. Breathing, external respiration and cellular respiration occurs

  4. Only inspiration occurs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Physiological respiration is the complete process of respiration which includes physical and biochemical pathway. In physical pathway, there is an exchange of gasses that takes place with the help of respiratory organ i.e., lungs. In biochemical pathway, cells are involved where oxidation of food i.e. glucose takes place in mitochondria and cytoplasm in the presence of several respiratory enzymes. 

So, the correct answer is option C.

Multiple choice chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

Ventilators are provided at the top of room

  1. To bring oxygen for breathing

  2. So that sunlight may enter the room

  3. To maintain convectional currents to keep the air fresh in the room

  4. To provide an outlet for carbon dioxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ventilators are provided in the rooms at the top of the roofs because if the air inside the room gets hot, the hot air rises up and flows through these ventilators and thus cool air remains at bottom. It brings cool and fresh air in the room. Thus ventilators maintain conventional currents to keep the air fresh in the room.

Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

A flap-like muscular valve controls the movement of air and food is ..........

  1. Nostrils

  2. Uvula

  3. Epiglottis

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The epiglottis is a leaf-shaped flap-like muscular valve made up of cartilage. It is located behind the tongue. The function of epiglottis is to prevent the entry of food in the windpipe and it seal off windpipe during eating.
So, the correct answer is 'Epiglottis'.
Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

Why can a person not swallow food and talk at the same time?

  1. The brain cannot control two activities at the same time.

  2. In order to speak, air must come through the pharynx to form sounds.

  3. In order to swallow, the epiglottis must close off the larynx (trachea).

  4. Both B and C are correct.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Speaking requires air to pass through the larynx, while swallowing requires the epiglottis to close off the larynx to protect the airway. These two actions are mechanically incompatible.

Multiple choice

Where is the diaphragm located?

  1. below the heart

  2. on each side of the bronchi

  3. at the top of the left lung

  4. below the lungs
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The diaphragm is a large, dome-shaped muscle located at the base of the thoracic cavity, directly below the lungs, which facilitates breathing.

Multiple choice

Which of these correctly maps the flow of air entering the body?

  1. nose - larynx - pharynx - bronchi - trachea - lungs

  2. nose - bronchi - pharynx - larynx - trachea - lungs

  3. nose - pharynx - trachea - larynx - bronchi - lungs

  4. nose - pharynx - larynx - trachea - bronchi - lungs
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Air enters through the nose, passes through the pharynx and larynx, travels down the trachea, branches into the bronchi, and finally reaches the lungs.

Multiple choice

A group of related tissues that perform a specific function like breathing is called?

  1. tissue

  2. organelle

  3. organ

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

An organ is a structure made up of different types of tissues working together to perform a specific, complex function. For example, the lungs are organs composed of epithelial, connective, and muscular tissues that work together to facilitate breathing. Organelles are smaller structures inside cells, while tissues are groups of similar cells.

Multiple choice

primary organ for respiration in humans

  1. gills

  2. nose

  3. mouth

  4. lungs
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The lungs are the primary organs of the human respiratory system, where the exchange of oxygen and carbon dioxide takes place. While the nose and mouth serve as entry points for air, gas exchange occurs in the alveoli of the lungs.

Multiple choice

Respiration by gills is called as

  1. Brancheal respiration

  2. Tracheal respiration

  3. Cutaneous respiration

  4. Pulmonary respiration
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Respiration that utilizes gills for gas exchange is called branchial respiration (spelled 'Brancheal' in the options). Tracheal respiration uses air tubes, cutaneous uses skin, and pulmonary uses lungs.