Week 6 Pt 1 - Central Control Of ANS Flashcards
What are the physiological roles of serotonin?
Increased stimulation of myenteric neurones and GI motility
What are the 5-HT receptors?
5-HT 1-7
What is 5-HT1 subdivided into?
5-HT1A
5-HT1B
5-HT1D
What is 5-HT2 subdivided into?
5-HT2A
5-HT2B
5-HT2C
In the hypothalamic Pituitary-Adrenal (HPA) system what does stressor activate?
HPA via activation of hypothalamus
What does hypothalamus stimulate?
Pituitary gland
What does pituitary gland secrete?
Adrenocorticotrophic hormone (ACTH)
What does ACTH stimulate adrenal gland to produce?
Cortisol
What is the function of cortisol?
Enable body to maintain steady supplies of blood sugar released from liver
What does adequate and steady blood sugar levels enable the body to cope with?
Prolong stressor - help return to normal
In the sympathomedulla pathway/ sympathoadrenal system what does strsssor activate?
HPA via activation of hypothalamus
What does hypothalamus activate?
Adrenal medulla which secretes adrenaline
What is the function of adrenaline?
Activate the sympathetic nervous system and reduce parasympathetic nervous system activity
What is the physiological effects of adrenaline?
Decrease in digestion
Increase in sweating, pulse and blood pr are
When the stressor is over what happens?
Parasympathetic nervous system takes control and returns to normal
