CH9.2-2 Breathing Control CYU

A woman has a higher respiratory rate than a man during exercise. What factor most likely explains this?

• She has more muscle mass

• She has a smaller lung capacity

• Her heart rate is slower

• She lives at sea level

Tags

NGSS.HS-LS1-3

While hiking at high altitude, Jake notices he is breathing faster. Why?

• The air is warmer

• There is more CO₂ in the air

• There is less oxygen available

• He is dehydrated

What part of the brain sets the basic rhythm of breathing?

• Frontal lobe

• Medulla oblongata

• Cerebellum

• Occipital lobe

Which part of the brain fine-tunes respiratory rate and coordinates transitions?

• Pons

• Thalamus

• Cerebrum

• Hypothalamus

During physical activity, which receptors first respond to increased muscle activity?

• Chemoreceptors

• Mechanoreceptors

• Baroreceptors

• Photoreceptors

If a person’s cerebrospinal fluid pH decreases, what is likely to happen?

• Breathing slows

• Carbon dioxide levels fall

• Central chemoreceptors trigger faster breathing

• Oxygen intake stops

Tags

NGSS.HS-LS1-3

A person with high levels of CO₂ in their blood is likely to have which reaction?

• Slowed breathing

• Stimulated inspiratory center

• Activation of photoreceptors

• Decreased hydrogen ion concentration

Tags

NGSS.HS-LS1-3

What is the function of the vagus nerve in respiration control?

• It moves the diaphragm

• It sends stretch receptor signals to the medulla

• It pumps blood through the lungs

• It releases oxygen

You are lying down and then stand up quickly. What happens to your breathing rate?

• It decreases

• It stays the same

• It nearly doubles

• It stops briefly

Tags

NGSS.HS-LS1-3

Which factor increases breathing rate due to reduced lung compliance?

• Gender

• Restrictive lung disease

• High humidity

• Being an athlete

Tags

NGSS.HS-LS1-7