Respiratory System Quiz

Which muscle is primarily responsible for inspiration?

• Internal intercostals

• Abdominal muscles

• Diaphragm

• Scalene

Which of the following is a passive process under normal conditions?

• Inspiration

• Expiration

• Both

• Aspiration

External intercostal muscles help in:

• Forced expiration

• Normal inspiration

• Forced inspiration

• Closing glottis

During forced expiration, which muscles are involved?

• Diaphragm and intercostals

• Only diaphragm

• Abdominals and internal intercostals

• Scalene and sternocleidomastoid

What happens to thoracic volume during inspiration?

• Increases

• Decreases

• Remains same

• Fluctuates randomly

What causes air to enter the lungs during inspiration?

• Positive alveolar pressure

• Diaphragm relaxation

• Negative intrapulmonary pressure

• Increased airway resistance

Which pressure becomes more negative during inspiration?

• Intrapulmonary

• Atmospheric

• Intrapleural

• Alveolar

The respiratory center is located in the:

• Cerebellum

• Spinal cord

• Medulla oblongata

• Midbrain

The apneustic center is found in the:

• Medulla

• Cerebrum

• Pons

• Spinal cord

Which part of the brain controls voluntary breathing?

• Cerebellum

• Hypothalamus

• Cerebral cortex

• Medulla