Free MCQs & Online Quiz Practice for Exams

Q: The correct order of the structures involved in the flow of air in the human body is

A) Pharynx→Trachea→Larynx→Bronchi→Bronchioles

B) Larynx→Pharynx→Trachea→Bronchi→Bronchioles

C) Trachea→Pharynx→Larynx→Bronchi→Bronchioles

D) Pharynx→Larynx→Trachea→Bronchi→Bronchioles

Q: Food is prevented from entering into the Larynx by

A) Glottis

B) Epiglottis

C) Vocal cords

D) Internal nostrils

Q: Oxygen from the lungs enters into the blood due to

A) Diffusion

B) Higher affinity of CO₂ for air

C) Less affinity of O₂ for air

D) Osmosis

Q: Which part of the air passageway is also called the windpipe?

A) Bronchus

B) Alveolus

C) Larynx

D) Trachea

Q: In which disease are the walls of the alveoli broken?

A) Pneumonia

B) Bronchitis

C) Emphysema

D) Asthma

Q: The diaphragm is flat and the ribs move out; this occurs during

A) Expiration

B) Inspiration

C) Lungs expansion

D) Breathing

Q: The chest cavity is separated from the abdominal cavity by a muscle called

A) Larynx

B) Trachea

C) Bronchus

D) Diaphragm

Q: Respiration at cellular level is known as

A) Breathing

B) Ventilation

C) Oxidation

D) Inhalation

Q: High fever cold and cough with sputum production are symptoms of

A) Emphysema

B) Asthma

C) Pneumonia

D) Lung cancer

Q: Chemotherapy is a treatment of

A) Emphysema

B) Bronchitis

C) Asthma

D) Lung cancer

Q: Organisms have the ability to change and modify their internal conditions according to the environment through

A) Osmoregulation

B) Excretion

C) Thermoregulation

D) All of the above

Q: All of the following are adaptations of xerophytes except

A) Thick cuticle

B) Sunken stomata

C) Large number of stomata

D) Deep root system

Q: The loss of water from the plants in the form of small droplets is

A) Stomatal transpiration

B) Lenticular transpiration

C) Cuticular transpiration

D) Guttation

Q: From a nephron wastes enter into the

A) Collecting tubules

B) Ureter

C) Convoluted tubules

D) Medulla

Q: The tube between the kidney and urinary bladder is the

A) Ureter

B) Urethra

C) Renal tubule

D) Nephron

Q: Waste products excreted by the kidneys are Urea water and salts

A) Urea, water and Salts

B) water and carbon dioxide

C) Urea and water

D) digestive organ

Q: Secretion of urea in sweat makes skin a

A) Respiratory organ

B) Breathing organ

C) Excretory organ

D) Digestive organ

Q: The two main functions of sweat are to

A) Keep the body cool and to remove excess proteins

B) Keep the body warm and to filter the blood

C) Filter the blood and to remove waste product

D) Remove waste products and to cool the body

Q: Which is NOT present in the filtrate entering the Bowman's capsule of a nephron?

A) Water

B) Calcium ions

C) Blood cells

D) Urea

Q: Liver also plays a role in excretion. It makes urea from

A) Uric acid

B) Ammonia

C) Carbon dioxide

D) Amino acids