ANSC 3080 Lecture Notes - Lecture 2: Voltage-Dependent Calcium Channel, Membrane Potential, Nervous Tissue

• School: University of Guelph
• Department: Animal Science
• Course: ANSC 3080
• Professor: Julie Kim

Document Summary

Nervous tissue is composed of 2 types of tissues neurons and glial cells. Neurons: (cid:498)the(cid:499) nerve cells able to transmit info. Axon = info moves away from cell body. Dendrite = info moves towards cell body. Cell body = integrates in and out going info. Sensory (afferent) = from pns to cns. Motor (efferent) = cns to muscles & glands. Interneurons (association) = relay info btw neurons in cns. Astrocytes = secrete glutamate = can modulate excitatory levels of neurons. Specialized (cid:498)receptors(cid:499) = transducers = convert stimuli to signal. * neuron categories: (based on number of processes) Glial cells: non-neuronal cells; 10x more abundant than neurons. Contact both blood vessels and neurons = transport nutrients **neurons do not store glucose or o2. Nerves = bundles of axons, run from or to the cns. Cell bodies of sensory neurons = located in clusters named ganglia (outside cns)