Negative Feedback (OCR GCSE Biology A (Gateway Science Suite)): Flashcards
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Negative feedback definition
Negative feedback definition
Body returns factor to original level after increase/decrease
What thyroxine regulates
What thyroxine regulates
Metabolic rate
Metabolic rate meaning
Metabolic rate meaning
How quickly reactions occur
Other role of thyroxine
Other role of thyroxine
Growth and development
Gland that releases thyroxine
Gland that releases thyroxine
Thyroid gland
Hormone that stimulates thyroxine release
Hormone that stimulates thyroxine release
Thyroid stimulating hormone (TSH)
Where increased thyroxine is detected
Where increased thyroxine is detected
Receptors in the brain
What increased thyroxine inhibits
What increased thyroxine inhibits
Release of TSH
Response adrenaline stimulates
Response adrenaline stimulates
'Fight or flight' response
Glands that release adrenaline
Glands that release adrenaline
Adrenal glands (on top of kidneys)
What stimulates adrenaline release
What stimulates adrenaline release
Fear or stress
Adrenaline effect on heart & breathing rate
Adrenaline effect on heart & breathing rate
Increased (delivers more O2 & glucose for respiration)
Adrenaline effect on liver glycogen
Adrenaline effect on liver glycogen
Converted to glucose for respiration
Adrenaline effect on pupils
Adrenaline effect on pupils
Dilate to let in more light
Adrenaline effect on muscle blood flow
Adrenaline effect on muscle blood flow
Increased