Play as stud
ents enter A
drenaline- F
ight or Flig
3/2/16
Hormones
LO To define hormone and explain the
function of adrenaline.
Key Words
Endocrine,
Adrenaline,
Hormone
Think Box: Can you guess what hormone we
are going to be talking about today from
the video?
Get a white board and pen
A
B
C
D
E
Which is the motor neurone?
A
B
C
D
E
Which is the relay neurone?
A
B
C
D
E
Which is the effector?
A gap between motor and relay neurones
is called
A a relay signal
B a synapse
C a neurotransmitter
D a motor end plate
Chemical
Messengers
Oestrogen
Glucagon
ADH
Coordinate systems
What is a Hormone?
What do hormones do?
Insulin
Can you think of any
examples?
Testosterone
Travel in the blood,
secreted by glands
HGH
Causes a change in how
the body works
Control Growth, blood sugar, sex
development, mood, metabolism.
A hormone is a chemical substance,
produced by a gland, carried by the
blood, which alters the activity of one
or more specific target organs
Endocrine Glands
produce hormones and
secrete them directly
into blood.
Sent to target organs.
Adrenalin
Testostero
ne
Insulin
Oestrogen
and
Progestero
ne
Adrenal Gland >
Adrenal gland (on top of
kidney) secretes adrenaline
when body given shock.
Adrenaline prepares the body
for action (fight or flight) by
doing a number of things. ..
Glucose + Oxygen
Adrenaline- Fight or flight
Deeper, more rapid breathing
Dilation of airways so more air reaches alveoli in
lungs for gas exchange
Get more oxygen!!!
Adrenaline- Fight or flight
Deeper, more rapid breathing
Dilation of airways so more air reaches alveoli in
lungs for gas exchange
Liver cells to convert glycogen to glucose.
Diffuses into blood and to muscles where it is a
source of energy for sudden contraction.
Get more glucose!!!
Adrenaline- Fight or flight
Now get the extra oxygen and glucose
to where its needed
Adrenaline- Fight or flight
Deeper, more rapid breathing
Dilation of airways so more air reaches alveoli in lungs
for gas exchange
Liver cells to convert glycogen to glucose. Diffuses
into blood and to muscles where it is a source of
energy for sudden contraction.
Heat rate increases- more oxygen and glucose
transported to working muscles.
Blood diverted away from digestive system to muscles.
Vasodilation of blood vessels in brain and muscles so
more glucose and oxygen delivered to these organs.
Compare
The nervous system and endocrine system
Nervous System
Structure
Forms of information
Pathway
Duration of response
Target area
Speed of reaction
Response
Hormonal System
The following words may help
Short-lived
Hormone (chemicals)
Nerves
Fast
Electrical impulse
Blood
Slow
Muscle contraction or secretion by
glands
Along neurones
Slow and longer lasting
Many responses e.g. conversion of
glucose to glycogen
Localised- only area at end of nerve such
as muscle tissue
Glands containing secretory cells
Widespread- whole tissue/organs
Compare
The nervous system and endocrine system
Nervous System
Hormonal System
Structure
Nerves
Glands containing
secretory cells
Forms of information
Electrical impulse
Hormone (chemicals)
Pathway
Along neurones
Blood
Duration of response
Short-lived
Slow and longer lasting
Target area
Localised- only area at
end of nerve such as
muscle tissue
Widespread- whole
tissue/organs
Speed of reaction
Fast
Slow
Response
Muscle contraction or
secretion by glands
Many responses e.g.
conversion of glucose to
glycogen
Complete summary sheets
