Neural Control N Coordination Flashcards
Other name of afferent fibre
Sensory nerve fiber
Other name of efferent fibre
Motor nerve fibre
In which neural sys is more simple
Lower invertebrates
Hydra nerve system
Network of neurons
Better arrangement of neurons in
Insects
Devloped nerve system
Vertebrates
Human nerve system is divided into
Cns n pns
What does cns have
Brain n spinal cord
Cns is the site of
Info process and control
Pns function
Transmission
Pns consitutes of
Afferent n efferent fibres
Visceral nervous system
Origin of fibres of pns
Afferent - organs/ tissues to cns
Efferent - cns to organs / tissues peripheral
Pns is divided into
Somatic and autonomic nervous sys
Function of somatic
Relay impulses from cns to skeletal muscles / voluntary
Autonomic function
Cns to involuntary organs n smooth muscles
Autonomic is further divided into
Sympathetic and parasympathetic systems
Visceral nervous system functions
Has nerves fibres ganglia and plexsus . From cns to visceral and back
Neuron parts
Microscopic , axon dendrite and cell body
Cell body has
Cytoplasm cell organells and nissils granules
Does dendriteshave nissils granules
Yes
Each branch of acon terminates into a
Synaptic knob
Synaptic knob has
Neurotransmitters
Denrites transmit info towards ______ and axons transmit away from _____
Dendrites , dendrites
Based on wt doe we have classification of neurons
Number of axons and dendrites
Multipolar r found in
Cerebral cortex
Bipolar is found in
Retina of eye
Unipolar is found in
Embryonic stage
Two types of axons r
Mylinated n non mylinated
Mylinated have
Schwann cells
Gaps between two mylein sheath is called
Nodea of ranvier
Mylinated r found in
Spinal n cranial
Unmylinated is found in
Autonomous and somatic neural system
Y are neurons excitable
Bcz their membranes r in polarised state
Ion channels r
Selectively permiable
In resting state which ion is more permiable
K
Membrane in resting state is impermiable to
Na n negatively charged protiens
Axoplasm has high conc of
K n negatively charged proteins
Ionic gradients r maintained by
Active transport of k/ na pump 3 na out n 2 k in
Charge of outer n inner surface is
Positive n negative
The potential diff at resting state is
Resting potential
What happens when stimules is applied
Na become more permiable and polarity reverses
What is the site that is reverses of polarity called
Depolarised
The potential diff is called
Action potential , nerve impulse
Current flows from
Site of depolarisation to unpolarised
