Ventilation and breathing control

Which part of the medulla oblongata is responsible for controlling breathing rate?

• Pons

• Cerebellum

• Hypothalamus

• Ventilation Centres

What is the function of the inspiratory centre?

• Initiates breathing in

• Initiates breathing out

• Stimulates Digestion

• Heart rate regulation

What happens to the diaphragm and ribcage when we are breathing in?

• Diaphragm relaxes, ribcage moves downwards

• Diaphragm contracts, ribcage moves upwards

• Diaphragm expands, ribcage stays still

• Diaphragm shrinks, ribcage expands

What is the role of stretch receptors in the lungs during breathing?

• Generate nerve impulses to the diaphragm

• Stop the breathing cycle

• Inhibit the expiratory centre

• Activate the inspiratory centre

What happens to the diaphragm and ribcage when we are breathing out?

• Diaphragm expands, ribcage stays still

• Diaphragm relaxes, ribcage moves downwards

• Diaphragm contracts, ribcage moves upwards

• Diaphragm shrinks, ribcage expands

What is the role of the expiratory center in the breathing process?

• Stimulates breathing in

• Stimulates breathing out

• Controls heart rate

• Regulates digestion

Which part of the brain is responsible for detecting changes in blood pH and adjusting breathing rate accordingly?

• Pons

• Cerebellum

• Hypothalamus

• Chemoreceptors

How does the body regulate breathing rate during physical exercise?

• By increasing CO2 levels in the blood

• By decreasing oxygen levels in the blood

• By activating the inspiratory center

• By inhibiting the expiratory center

What type of receptors monitor blood pH?

• Photoreceptors
• Thermoreceptors
• Mechanoreceptors
• Chemoreceptors

Which muscles contract during inhalation?

• Biceps and triceps
• Diaphragm and external intercostal muscles
• Diaphragm and internal intercostal muscles

• Pectoral and deltoid muscles