Heart Flashcards
What is Stress?
General term for any condition that actually or potentially poses a serious challenge to the body’s ability to maintain homeostasis.
Different types of stress
Psychological
Physical
What is haemorrhage?
Significant loss of blood over a short time spell
Rapid short-term response
“Fight or flight”
Sympathetic autonomic nervous system.
Long-lasting body responses
Endocrine system
Adrenal glands
Two small glands above kidney.
Breakdown of stores of glycogen to release glucose in the bloodstream
Glycogenolysis
Release glucose from pre-cursors in the liver
Gluconeogenesis
Vasoconstriction alpha 1
Noradrenaline
Vasodilation in skeletal muscle beta 2
Adrenaline
Familiar emotional stress
Increases the release of noradrenaline
Unfamiliar stress
Increases the release of adrenaline
Adenoma of the adrenal medulla
Pheochromocytoma
Symptoms of pheochromocytoma:
Hypertension
Increased heart rate
Increased blood glucose
Increased sweating
Cortisol is released by:
Adrenal cortex