Flashcards in Function Of The Endocrine System And Fight Or Flight Response Deck (32):
What does the endocrine provide?
Provides the human body with a chemical communication
What does the endocrine consist of?
A network of glands
What are glands?
Structures/organs which release a variety of chemicals into the blood stream
What is the pituitary gland?
The "master gland" as the hormones that it releases control the actions of all the other glands in he body, rather than having a direct influence on the target cells of the body.
What are hormones?
Chemicals that are released/secreted from glands.
What do hormones do?
They affect and organise the body's entire physiological system, regulating a variety of bodily functions.
How do hormones travel?
Via the bloodstream to the other glands or organs in distant locations throughout the body to exert their effects.
What does the pituitary gland release?
What does the Thyroid gland release?
What do adrenal glands release?
Adrenaline and glucocorticoids (cortisol)
What does the pancreas release?
What do the testes release?
What do the ovaries release?
Oestrogen and progesterone
What does the pineal gland release?
What does the endocrine system work in tandem with?
The Nervous system
What is first alerted in the fight or flight response?
What system is activated once the hypothalamus is alerted in the fight or flight response
What does the sympathi-medullary pathway activate in the fight or flight response?
The Sympathetic branch of the autonomic Nervous system
What is activated in response to the sympathetic branch being activated in the fight or flight response?
What does the adrenal medulla produce in the fight of flight response?
Adrenaline and noradrenaline are secreted
What does adrenaline and not adrenaline do in the fight or flight response
The hormones are detected by adrenergic receptors in target cells of the body which leads to changes such as increased heart rate, oxygen and glucose supply to the brain and muscles for instant energy, and suppression of non-emergency processes
How do pupils react to increased levels of adrenaline?
They dilate to increase awareness of external stimuli and thus the ability to respond to them
How does the heart react to increased levels of adrenaline
The heart rate increases to speed up blood circulation allowing oxygen to be carried t the muscles more quickly
How does the spleen react to increased levels of adrenaline
It releases res blood cells allowing the blood to carry more oxygen
How does sugar metabolism react to increased adrenaline
It speeds up to provide an instant supply of energy
How do bronchial tubes react to an increase in adrenaline
They dilate to accelerate airflow so more oxygen is taken int the lungs; muscles require oxygen to work efficiently
How does sweat contribute to the body when in the fight or flight response
It cools down the body
How is the bladder effected by an increase in adrenaline
Emptying the bladder is inhibited
How do neurotransmitters react to an increase in adrenaline
Endorphins are produced which block immediate feelings of pain
Why are additional blood platelets produced when adrenaline increases?
It assists clotting and so prepares the body to repair potential physical damage
How do they intestines react to an increase in adrenaline?
Digestion of food is interrupted as blood goes to muscles