Explore topic-wise MCQs in Biology.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.

1.

The signal for voluntary muscle for forced breathing starts in ______

A. medulla
B. cerebrum
C. pons
D. cerebellum
Answer» C. pons
Discussion
2.

Dead space air is _______

A. 150 CC
B. 350 CC
C. 500 CC
D. 1500 CC
Answer» B. 350 CC
Discussion
3.

Which does not occur on normal inspiration?

A. Contraction in diaphragm
B. Contraction in external intercoastal muscle
C. Contraction in internal intercoastal muscle
D. Sternum moves upward
Answer» D. Sternum moves upward
Discussion
4.

Pneumotaxic centre is located in ________

A. pons
B. cerebrum
C. medulla
D. cerebellum
Answer» B. cerebrum
Discussion
5.

Strength of inspiration and expiration can be increased with the help of_______

A. abdominal muscles
B. external intercoastal muscle
C. diaphragm
D. internal intercoastal muscle
Answer» B. external intercoastal muscle
Discussion
6.

What happens to RBC of human blood at high altitude?

A. Decrease in size
B. Decrease in number
C. Increase in size
D. Increase in number
Answer» E.
Discussion
7.

Where is the respiratory rhythm center is located?

A. Medulla region
B. Aortic arch
C. Pons region
D. Carotid artery
Answer» B. Aortic arch
Discussion
8.

Contraction in diaphgram causes increase in thoracic volume in the _____

A. dorso-ventral axis
B. antero-posterior axis
C. dorso-posterior axis
D. antero-ventral axis
Answer» C. dorso-posterior axis
Discussion
9.

Air that remains in lungs after most powerful expiration is _______

A. inspiratory air
B. residual air
C. dead space air
D. tidal air
Answer» C. dead space air
Discussion
10.

Which of the following is the most important muscular structure in respiratory system of human?

A. External intercoastal muscle
B. Internal intercoastal muscle
C. Diaphgram
D. Vertebral column
Answer» D. Vertebral column
Discussion