BIO2A03-2011-L19 - Biol 2A03 -2011 Lecture 19 2 Cell Types:...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Biol 2A03 -2011 Lecture 19
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Cell Types: (neurons and glial) A) Neurons -Many different types and anatomies (ie: afferent sensory neurons, interneurons, efferent motor neurons), in humans they can be 1mm to 1m in length. -Make up 10 % of cells of the nervous system. -Basic functional unit. - Excitable cells : can produce rapid electrical signals “Action Potentials” (APs) = waves of electrochemical energy that pass along the length of the neuron. Use APs to transmit information rapidly over long distances . -Can be Structurally and Functionally classified.
Background image of page 2
Sensory/receptor Effector organs 3 Functional classes of Neurons, Fig 8.4, pg 215 2. Interneurons 1. Afferent neuron (input) 3. Efferent neuron (output)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Dendrites: numerous small branches, receive most of incoming information from other neurons via synapses. Results in Graded Potentials (GPs) . Cell body or soma: contains most organelles, metabolic functions. Axon hillock : trigger zone, fires APs as a result of summation of GPs . Site of most Integration . Axon:
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 12

BIO2A03-2011-L19 - Biol 2A03 -2011 Lecture 19 2 Cell Types:...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online