autonomic nervous system Flashcards
state 3 activities controlled by the ANS
- heartbeat
- sweating
- pupil dilation
what is the autonomic nervous system?
concerned with controlling involuntary activities
what is the ANS subdivided into?
- sympathetic nervous system
- parasympathetic nervous system
what is the role of the sympathetic nervous system?
- prepares body for fight or flight
- eg speeds up heart rate
what is the role of the parasympathetic nervous system?
- relaxes body
- eg slows down heart rate
what do the two divisions of the ANS consist of?
2 neurones that connect CNS to effector
what is the difference in structure between the parasympathetic and sympathetic fibres?
parasympathetic
- long pre ganglion
- short post ganglion
- close to effector
sympathetic
- short pre ganglion
- long post ganglion
- close to spinal cord
what is the difference in the neurotransmitter in effector synapse between parasympathetic and sympathetic fibres?
parasympathetic
- acetylcholine
- cholinergic synapse
sympathetic
- noradrenaline
- adrenergic synapse
