Which part of the nervous system stimulates the adrenal medulla during the fight or flight response?

The adrenal medulla and the physiological effects of adrenaline, the second messenger cascade through cyclic AMP, and sympathetic and parasympathetic control of heart rate.

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Key term

What is the fight or flight response?

Questions from this subtopic

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1
What is the fight or flight response?
Model answer
A coordinated physiological response to perceived threats, involving both the nervous and endocrine systems.
2
Which part of the nervous system stimulates the adrenal medulla during the fight or flight response?
Model answer
The sympathetic nervous system.
3
Name four physiological effects of the fight or flight response.
Model answer
Increased heart rate, increased breathing rate, dilation of pupils, redirection of blood to muscles, and release of glucose from glycogen stores.
4
Why is adrenaline described as a first messenger?
Model answer
It binds to receptors on the cell surface membrane of target cells without entering the cell.
5
What enzyme is activated when adrenaline binds to its receptor?
Model answer
Adenylyl cyclase, located on the inner surface of the cell membrane.
6
What does adenylyl cyclase produce and what is its role?
Model answer
It converts ATP to cyclic AMP, which acts as a second messenger inside the cell.

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