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WorksheetsRespiratory System Quiz
Total questions: 20
Worksheet time: 10mins
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
Which chemoreceptors respond to changes in CO₂ and H⁺ in CSF?
Peripheral chemoreceptors
Central chemoreceptors
Aortic baroreceptors
Lung stretch receptors
Peripheral chemoreceptors are located in:
Pons and medulla
Aortic and carotid bodies
Lungs and trachea
Cerebral cortex
Which chemical is the most potent regulator of respiration?
Oxygen
Hydrogen
Nitrogen
Carbon dioxide
Which nerve carries signals from carotid body to the brain?
Vagus nerve
Glossopharyngeal nerve
Facial nerve
Phrenic nerve
Hypoxia stimulates which receptors?
Thermoreceptors
Peripheral chemoreceptors
Central chemoreceptors
Stretch receptors
Which of the following increases respiratory rate?
Low CO₂
High pH
High CO₂
Low H⁺
Stretch receptors in lungs cause which reflex?
Withdrawal reflex
Cough reflex
Hering-Breuer reflex
Moro reflex
What is the function of the dorsal respiratory group?
Controls expiration
Controls coughing
Controls quiet inspiration
Controls swallowing
Which group is active during forced expiration?
Apneustic center
Ventral respiratory group
Dorsal respiratory group
Cerebral cortex
Hyperventilation leads to:
Respiratory acidosis
Respiratory alkalosis
Metabolic acidosis
Metabolic alkalosis
