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Paper 2
(5) Homeostasis
reflexes
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Receptor cells
are
cells
that
detect stimuli.
Effectors
bring about
responses
to bring the
conditions
in the body back to
optimum level.
Effectors
are
muscles
or
glands.
Coordination centres
process the information received from
receptors.
Sensory neurons
carry information as
electrical impulses
from
receptors
to the
CNS.
Motor neurons
carry
electrical impulses
from the
CNS
to
effectors.
Effectors
are all the
muscles
and
glands
which respond to
nervous impulses.
Synapses
connect
neurons.
Nerves
signals are transferred
chemically
across
synapses.
Chemicals
transfers through
synapses
set off new
electrical signals
in the next neuron.
The CNS stands for
central nervous system.
The CNS consists of your
brain
,
spinal cord
and the
nerves
running from the CNS.
The
CNS
receives information from
receptors.
The CNS is the
coordination centre.
The passage of information in a
reflex
is called the
reflex arc.
Reflexes are
rapid
and
automatic.
Reflexes do not involve the
conscious
part of your brain.
Chemicals diffuse
across the gap in
synapses.
Receptor cells
are
cells
that
detect stimuli.
Effectors
bring about
responses
to bring the
conditions
in the body back to
optimum level.
Effectors
are
muscles
or
glands.
Coordination centers
process the
information
received from
receptors.
Sensory neurons
carry information as
electrical impulses
from
receptors
to the
CNS.
Motor neurons
carry
electrical impulses
from the
CNS
to
effectors.
Effectors
are all the
muscles
and
glands
which respond to
nervous impulses.
Synapses
connect
neurons.
Electrical signals are transferred chemically across synapses.
Chemicals
transfers through
synapses
set off new
electrical signals
in the next neuron.
The CNS stands for
central nervous system.
The CNS consists of your
brain
,
spinal cord
and the
nerves
running from the CNS.
The
CNS
receives information from
receptors.
The
CNS
is the
coordination center.
The passage of information in a
reflex
is called the
reflex arc.
Reflexes are
rapid
and
automatic.
Reflexes do not involve the
conscious
part of your brain.
Chemicals diffuse
across the gap in
synapses.
The nervous system is made up of
motor neurons
,
sensory neurons
,
effectors
and the
CNS.
What are the chemicals released at a
synapse
called?
neurotransmitters
What are axons surrounded by?
a layer of
fatty cells
called a
myelin sheath
What does a myelin sheath do?
Insulates electrical impulses
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