Discuss the electrical nature of the nerve impulse. Use a diagram to show the the concentration of sodium, chlorine, and calcium ions on both sides of the plasma membrane. Define polarized cell membrane. Indicate that a stimulus changes the permeability of the membrane to these ions. This "action potential" now causes the iside of the membrane to become positive and the outside negative. The cell is now depolarized. Show how depolarization and repolarization will occur along the cell membrane until it reaches the end terminals and causes the secretion of neurotransmitters across the synapse. This is the cell electrical transmission.

Discussion of the anatomy and function of the efferent (motor) and afferent(sensory) nerves. The anatomy of a motor neuron, along with the function of the dendrites, soma, axon, nodes, myelin sheath, and terminal branches described using a diagram. The function of a sensory nerve also outlined. The Autoimmune disorder of multiple sclerosis presented using the symptoms associated with the myelin sheath destruction which occurs along a motor or sensory nerve fiber. Motor nerves carry an impulse from the CNS to a muscle or gland, while sensory nerves transmit an impulse from a receptor to the CNS. The affects of non communication of both types of nerves is demonstrated by the symptoms produced.

Absent

Outline the functions of the nervous system. Detection of changes in the external and internal environment, Define these changes as stimuli. Equate stimuli with an appropriate response and discuss the process as a stimulus-response reaction. Show how the nervous system also organizes, and stores, the information to maintain homeostasis. Divide the system into both the central nervous system and the peripheral nervous system. Show the relationship of both using a diagram. Briefly outline the major parts of both systems. Using a diagram of a nerve, label how a nerve is composed of nerve bundles which are composed of nerve fibers, which are composed of neurons or nerve cells. From a diagram of a motor neuron, discuss the function of the cyton or soma (cell body) and the special function of the Schwann cells, myelin sheath, and neurolemma.

Absent. Lena had to leave early today.

Lesson outline is the same all week due to Nina' absence.

During today's Anatomy and Physiology class, we studied the divisions of the Nervous System as the central nervous system, somatic nervous system, autonomic nervous system, and enteric nervous system.

Outline is the same as the Tuesday outline.

During today's Anatomy and Physiology class, we watched a couple of videos based on the brain and the neurons. Lena loved the videos and we had a lot of fun.

The functions of the nervous system are presented. Detect stimuli, initiate appropriate responses, organize, store, and use information to maintain homeostasis. Terms used are defined and explained in detail. Stimuli, external environmental changes, internal environmental changes, responses, immediate and long term use of stored information. Indicate that the N.S. is only one of the regulatory systems in organisms, the other being the endocrine system. Outline the nervous system into the central nervous system and the peripheral nervous system, and differentiate the two anatomically.