Human Physiology Multiple Choice Questions on “Breathing and Exchange of Gases – Respiratory Organs”.
1. The epithelial tissues present on the inner surface of bronchioles and fallopian tubules are ________
A. Squamous
B. Ciliated
C. Glandular
D. Cuboidal
View Answer
Answer: B
Clarification: Ciliated epithelial tissues are present on inner surface of bronchioles and fallopian tubes. These hairs called cilia move back and forth to help move particles out of the body. They contain goblet cells which secrete mucous.
2. The site of respiration inside the lungs are _________
A. Alveoli
B. Diaphragm
C. Bronchi
D. Bronchioles
View Answer
Answer: A
Clarification: Alveoli is tiny air sacs of lungs which allow for rapid gaseous exchange. It is located at the very end of conducting zone and beginning of the respiratory zone in the respiratory system.
3. The number of gills present in Osteichthyes is _________
A. 2 Pairs
B. 12 pairs
C. 5 pairs
D. 10 pairs
Answer: b
Clarification: Osteichthyes are referred as bony fish. They respire through gills. They have 12 pairs of gills present.
4. _________ acts as air conditioners.
A. Nasal chambers
B. Larynx
C. Pharynx
D. Lungs
Answer: A
Clarification: Nasal chambers are internal nose. Each cavity is the continuation of one of the two nostrils. They act as air conditioners.
5. Finest branches of bronchial intercom are bronchioles.
A. True
B. False
Answer: B
Clarification: Bronchioles are the minute branches into which a bronchus divides. It helps in respiration.
6. What is the function of trachea?
A. Filters air we breathe
B. Releases air out of the body
C. Carries air to lungs
D. Exchange of gas
View Answer
Answer: A
Clarification: Trachea is also known as windpipe. It is a cartilaginous tube that connects the pharynx and larynx to lungs. It filters the air.
7. The trachea leads to the ________
A. Pulmonary vessels
B. Esophagus
C. Bronchi
D. Bronchioles
View Answer
Answer: C
Clarification: The trachea leads to the bronchi. Trachea extends from larynx and branches into two primary bronchi.
8. Hyaline cartilage has a primary function of ______________
A. Protect thyroid
B. Increase the surface area
C. Support trachea
D. Connect conchae
Answer: C
Clarification: Hyaline cartilage is a glass like but translucent cartilage. It contains no nerves or blood vessels and simple in structure. It supports trachea.
9. Which of the following does not belong to conducting portion of the respiratory system?
A. Nose
B. Pharynx
C. Alveoli
D. Bronchioles
View Answer
Answer: C
Clarification: Respiratory system is divided into conducting zone and respiration zone. Alveoli belong to respiration zone and not conducting zone.
10. The structure which closes of larynx is _________
A. Epiglottis
B. Vocal cords
C. Adam’s apple
D. Glottis
Answer: a
Clarification: The epiglottis is a flap made up of elastic cartilage. It stands open during breathing allowing air into the larynx.
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