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INTERACTION AND COORDINATION (we need to (such a interaction and…
INTERACTION AND COORDINATION
we need to
stimuli
respond accordingly
perceive
such a interaction and coordination
includes
making decisions
using the brain
responding
by moving or secreting
substances
via
muscles
glands
obtaining information
from the world
around us
through
sensory organs
maintaining
homeostasis
in body temperature
glucose levels, etc
RESPONDING TO STIMULI
endocrine and nervous systems
two interconnected systems
both rely
sensory organs
perceive information
from the external environment
after processing this
these systems respond
through
movement
secretion
via the skeletal
and muscular systems
ENDOCRINE SYSTEM
network
made up of glands
secrete
chemical messengers
hormones
into the blood
1
endocrine glands
release chemical messengers
called hormones
into the blood
2
circulatory system
distributes hormones
around whole body
3
hormones
only affect
certain cells or organs
know as
target organs
target cells
NERVOUS SYSTEM
extensive network of nerves
made up of interconnected
highly specialised cells
found
all body
in some places
are present
large groups
form organs
such
2 more items...
1
messages moving
through nervous system
do this as nerve impulses
2
chemical messengers
called neurotransmitters
convey message
from one neuron
to the next
from a neuron
to a cell
3
neurotransmitters carry
message through
synapse
extremely
tiny gap between
the original neuron
pre-synaptic
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MAINTAINING HOMEOSTASIS
stability
many aspects
of our body's internal environment
such
composition of fluids
blood pressure
body temperature
etc
controlled
via nervous and hormonal systems
equilibrium
called homeostasis