Slides in this set
IMPULSES? THE NERVE OF IT!
RELAY NEURONS- CARRY IMPULSES BETWEEN THE CNS'S(SPINE AND BRAIN).
MOTOR NEURONS- CARRY RESPONSE TO THE EFFECTOR
SENSORY NEURON- CARRY STIMULUS TO THE CNS.
AXONS- LONG FIBRE CYTOPLASM SURROUNDED BY CELL MEMBRANES
FATTY SHEATHS- ELECTRICAL INSULATOR WHICH SPEEDS UP THE EKECTRICAL
IMPULSE AND SHIELS FROM OTHER CELLS.
SYNAPSE: Signals cross this gap using
chemicals. One neurone releases the
chemical into the synapse. The chemical
diffuses attach to the next neurone to
transmit the electrical signal.
The peripheral nervous
system (PNS) consists of motor and
sensory neurons…read more
...HMM LET'S SEE...WHAT WAS IT NOW??
HMM ...AH YES, MEMORY!! So far no model has provided a satisfactory explanation of hum memory.
· Memory is the storage and retrieval of
· Humans are more likely to remember things with
a strong stimuli like a bright colour, smell or
noise or even a pattern, e.g. 123123123 instead
of 4926401739- it helps if the information is
repeated especially over a long time.
· There are two types of
· Lasts memory.
few seconds-few hours, it's used for
information you're think about at the
Short term moment.
memory · Input from the senses i.e. smell, hear
· Or recalled longer term memories
memory · Stored days, months or years ago.…read more
· Learning means you can adapt to new situations
· Complex animals can do this!
There are a variety of potential pathways in the brain.
Simpler animals i.e. insects have less flexible nervous systems so
less pathways = less adaptable.
Some skills can only be developed at certain ages like language.
For a child to speak they must hear others speak.
· This has to happen in the critical period. If they haven't learnt to
speak around ten they probably never will
· Evidence include feral children over ten not being able to speak,
but a feral child under 10 has been taught to speak although her
grammar was atrocious!…read more
I WANT YOUR BRAINS!!MUAHAHAHAHA
Knowing what the brain does helps
with diagnosis and treatment of brain
The cerebral cortex is the part of the brain
responsible for intelligence,
language, memory and consciousness.…read more
SEROTONIN IS A CHEMICAL RELEASED IN THE BRAIN THAT GIVES FEELINGS OF PLEASURE.
LACK OF THIS CHEMICAL CAN LEAD TO FEELINGS OF DEPRESSION. IT CAN AFFECT THINGS
LIKE PAIN, AGGRESSION AND APPETITE.
blocks the serotonin receptor sites in the synapses in the
DRUGS AND TOXINS CAN INTERFERE WITH THE TRANSMISSION OF
IMPULSES across a synapse.
where serotonin Drugs
is removed. man…read more