Zusammenfassung der Ressource
Year one: Brain and behaviour
- Neurons and synapses
- Neurons
- Cajal showed neurons are
individual units, separated by a
gap called a synapse.
- Golgi stain
- The use of
silver nitrate
to stain
neurons
- Allows the
structure
of a
neuron to
be seen
- Neuron structure
- Dendrite
- Receives inputs
from other
neurons
- Axon
- Transmits signals
across distances
- Synaptic
terminals
- Release
neurontransmitters
- Cell body (soma)
- Carries out basic life functions
- Node of ranvier
- Gaps in the axon that
increase the speed of
transmission
- Myelin
- Insulating layer
made of fatty
substances and
protein
- Nucleus
- Contains chromosomes and genes
- Endoplasmic reticulum
- Folded layers of membrane
where proteins are assembled
- Mitochondria
- Structure that
gathers,
stores and
releases
energy
- Dendritic spine
- Small protrusion on
dendrites that
increase surface
area
- Intracellular fluid
- Fluid in which the cell's internal structures are suspended
- Tubule
- Tiny tube that
transports molecules
and helps give it it's
shape
- Lysosomes
- Sacs containing
enzymes breaking
down waste
- Microfilaments
- Threadlike fibres
making up a large
amount of the cell's
"skeleton"
- Size and shape
- Interneurons -
short or no
axons
- Neurons with massive
dendrites often
integrate information
from many others
- Long axons - transmit
information over long
distances
- E.g. neurons
going from the
motor cortex to
the spinal cord