Negative Feedback: CO2 Concentrations (Grade 12 NSC Matric Life Sciences): Flashcards
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Effect of high on blood pH
Effect of high on blood pH
Lowers pH (makes blood more acidic)
Chemical reaction: forms
Chemical reaction: forms
(carbonic acid)
Location of chemoreceptors that detect /pH changes
Location of chemoreceptors that detect /pH changes
Carotid arteries
What chemoreceptors detect in blood
What chemoreceptors detect in blood
Changes in pH (caused by levels)
Control centre for regulation
Control centre for regulation
Medulla oblongata (in brainstem)
Effector organs in regulation
Effector organs in regulation
Respiratory muscles (diaphragm, intercostal) and heart
Response to high levels
Response to high levels
Faster/deeper breathing and increased heart rate
What negative feedback means
What negative feedback means
Response opposes the original stimulus
Primary trigger for increased breathing
Primary trigger for increased breathing
Rising levels (not falling oxygen)
Result of negative feedback system
Result of negative feedback system
Homeostasis is restored