Negative Feedback: CO2 Concentrations (Grade 12 NSC Matric Life Sciences): Quizzes
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Practise the questions
10 questions from this quiz
What type of feedback system regulates CO2 levels in the blood?
What type of feedback system regulates CO2 levels in the blood?
Negative feedback
Where are the chemoreceptors that detect blood pH changes located?
Where are the chemoreceptors that detect blood pH changes located?
Carotid arteries
Which control centre processes signals from chemoreceptors during CO2 regulation?
Which control centre processes signals from chemoreceptors during CO2 regulation?
Medulla oblongata
What happens to blood pH when CO2 levels increase?
What happens to blood pH when CO2 levels increase?
pH decreases (more acidic)
What is the main response of respiratory muscles when CO2 levels are high?
What is the main response of respiratory muscles when CO2 levels are high?
Faster and deeper breathing
What compound forms when CO2 dissolves in blood plasma?
What compound forms when CO2 dissolves in blood plasma?
Carbonic acid
What is the primary trigger for increased breathing rate?
What is the primary trigger for increased breathing rate?
Rising CO2 levels
Which muscles are classified as respiratory muscles in CO2 regulation?
Which muscles are classified as respiratory muscles in CO2 regulation?
Diaphragm and intercostal muscles
What happens in Step 6 of the CO2 regulation process?
What happens in Step 6 of the CO2 regulation process?
CO2 returns to normal, homeostasis restored
Why do both breathing rate and heart rate increase together during CO2 regulation?
Why do both breathing rate and heart rate increase together during CO2 regulation?
To pump blood faster through lungs