Organisation of nervous tissue Flashcards
Essential functions?
acquire and transmit sensory info, process info, activate a response. PAR. process, acquire, respond
response info is what output
motor output
2 major divisions of nervous system?
PNS and CNS
Function of CNS
processing and control of info.
what does CNS consist of
brain and spinal cord
function of PNS
nerves carrying info to and from the CNS
what does PNS consist of
nerve tissues outside the CNS
Sensory neurones are what ?fferent
Afferent
What do afferent neurons do?
carry info from the body to the CNS
Motor Neurones are what ?fferent
Efferent
What do efferent neurons do?
Carry info away from the CNS towards effector organs
Efferent/Motor neurons can be further classified into 2 subs, name them
Somatic and autonomic
Describe somatic (2)
Voluntary. Carrys impulses from CNS to Skeletal muscles
Describe Autonomic
Involuntary, Impulses from CNS to muscles and glands.
Autonomic subdivided into 2 groups, name them?
Sympathetic and parasympathetic
describe sympatheticq
flight or fight, survival responses
describe parasympathetic
relaxation and digestion
Match paras/sympa with active/inactive organs
Sympathetic nerve impulses = active target organs. Parasympathetic nerve impulses = inactive target organs. Sympa nerve pulses make heart beat faster.
Define Ganglia (plural is ganglion)
Collection of nerve cell bodies
Where does ganglia reside
outside CNS
Ganglia plays an important role in CNS or PNS
PNS
What is the PNS further divided into
Eff and Aff neurons
