Across Flashcards
A neurotransmitter released in response to the parasympathetic nervous system- puts you into a relaxed state
Acetylcholine
The brain stem
Medulla Oblongata
The portion of the brain responsible for maintaining homeostasis within the body
Hypothalamus
The dorsal root looks different then that central root due to the presence of an enlargement called WHAT
The dorsal root ganglion
The void running down the centre of the spinal cord
Central canal
The dorsal root conducts nerve impulse IN WHAT DIRECTION
Towards the spinal cord
Shorter branches of a neutron which receive nerve impulses
Dendrite
CNS
Central nervous system
Occurs when sodium and potassium ions are being returned to their resting potential concentrations
Refractory period
During resting potential, WHAT is the most common ion inside cell
Potassium
Contain the neurotransmitters within the axon ends
Synaptic vesicles
During resting potential, WHAT is the most common ion outside the cell
Sodium
The central root conducts nerve impulses IN WHAT DIRECTION
Away from spinal cord
Another word for “sensory” neuron
Afferent/ motor
Nerves are bundles of individual cells called
Neurons
2 components of the CNS
Brain
Spinal cord
The coated portions of the axon are called WHAT
Schwann cells
Another word for “motor” neuron
Efferent
The voltage inside a neuron at resting potential
Approx. -70mV
WHAT are at the end of the axon
Axon terminals
3 protective membranes around the spinal cord
Meninges
The space between the axon ends of one nerve cell and the dendrites of a neighbouring cell
Synapse/ synaptic cleft
The portion of the nervous system which produces the “fight or flight” response
Sympathetic
WHAT are breaks between myelinated sections of the axon
Nodes of ranvier
The portion of the cerebrum responsible for thinking
Frontal
The portion of the cerebrum responsible for vision
Occipital
A chemical that is released to transmit a nerve impulse from one nerve cell to the next
Neurotransmitters
The portion of the nervous system which is “involuntary” (not under your conscious control)
Autonomic
After an action potential, sodium and potassium are returned to their resting potential state by the process of
Active transport
The central part of the neuron, where most activities related to the maintenance of the cell occur
Cell body
WHAT makes the post synaptic membrane more permeable to sodium and therefore more likely to produce action potential
Excitatory transmitters
