KNES 259 Lecture Notes - Lecture 19: Microtubule, Axon Hillock, Resting Potential

54 views2 pages

orchidcrab540

2 Nov 2016

School

University of Calgary

Department

Kinesiology

Course

KNES 259

Professor

Ronald Reed Ferber

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Knes 259 chapter 12 membrane potentials and action potentials. Nerve: a (cid:271)u(cid:374)dle of (cid:374)euro(cid:374)s (a two way (cid:858)roadway(cid:859) that is se(cid:374)sory a(cid:374)d/or (cid:373)otor) Action potential: an electrical message that travels in a neuron. Dendrites: the stimulated end of a neuron (input zone) that increase the surface area to receive signals and sends signals to the cell body. Axon hillock: where the neuron will decide to send an action potential (depending on threshold); connects cell body to the axon. Axon: long projection of a neuron that conducts impulses/action potentials away from the cell body. Axon terminals: at the end of the axon; merges/synapses to other nerves, muscles, glands, etc. to pass on chemical messages. Bipolar: cell body in centre of axon (used in eye functions) Pseudo-unipolar: cell body in centre of axon as a side unit. Multipolar: cell body at dendrite end of neuron (most common)

Related Questions

Nerve cells that conduct messages are called (1) ____. (2) _____ cells, which support and nurture the activities of neurons, make up less than half the volume of the nervous system. (3) _______ neurons respond to specific kinds of environmental stimuli, (4) ______ connect different neurons in the spinal cord and brain, and (5) ______ neurons are linked with muscles or glands. All neurons have a (6) _______ ________ that contains the nucleus and the metabolic means to carry out protein synthesis. (7) _______ are short, slender extensions of the (6), and together these two neuronal parts are the neuronsâ âinput zoneâ for receiving (8) _____. The (9) _____ is a single long, cylindrical extension away form the (10) ______; in motor neurons, the (11) ______ has finely branched (12) ________ that terminate on muscle or gland cells and are âoutput zones,â where messages are sent on to other cells. A neuron at rest establishes unequal electric charges across its plasma membrane, and a(n) (13) ____ ____ is maintained. Another name for (13) is the (14) _____ _____ _____; it represents an ability for the membrane to be disturbed. Weak disturbances of the neuronal membrane might set off only slight changes across a small patch, but strong disturbances can cause a(n) (15) _______ ______, which is an abrupt, short-lived reversal in the polarity of charge across the plasma membrane of the neuron. For a fraction of a second, the cytoplasmic side of a bit of membrane becomes positive with respect to the outside. The (16) ______ that travels along the neural membrane is nothing more than short-lived changes in the membrane potential. A. Neurons H. Sensory B. Motor I. Endings C. Interneurons J. Disturbance D. Cell body K. Signals (stimuli) E. Axon L. Voltage differential F. Dendrites M. Resting membrane potential G. Neuroglial N. Action potential

azureelk922

KNES 259 Lecture Notes - Lecture 19: Microtubule, Axon Hillock, Resting Potential

Document Summary

Get access

Related Documents

KNES 259 Lecture Notes - Lecture 13: Cytosol, Positive Feedback, Phosphate

KNES 259 Lecture Notes - Lecture 20: Hypothermia, Multiple Sclerosis, Resting Potential

KNES 259 Lecture Notes - Lecture 22: Axon Terminal, Schwann Cell, Multiple Sclerosis

Related Questions