BIOS 252 Week 2 Nervous System-Introduction - Lab

Learning Outcomes: ● Organize the NS into structural and functionaldivisions ● Locate and identify the cellular components of nervoustissue ● Explain the formation of the resting membrane potential and the action potential, andthe propagation of the action potential to form a nerveimpulse. ● Explain the factors involved in the transmission of an action potential from one neuronto another in the synapse. Introduction The nervous system is a vast network of neurons that act as a communication system throughout the body. The structures of the nervous system include the brain, spinal cord, and nerves. Today you will explore its organization and cellular components. You will also explore the physiology of action potentials that allows communication via electrical impulses. Assignment Part 1: Complete the activities in Anatomy.TV Nervous system: Introduction, Organization, Nervous tissue, Action Potentials, Synapses Part 2: Complete the lab report. Nervous System Lab Report 1. List the components of the central nervous system vs the peripheral nervoussystem. (1 point; ½ pointeach) 2. Compare and contrast the following parts of the peripheral NS utilizing the chart: (3 points; 1/2 pointeach) 3. Label the neuron with the following terms. (½ point each for 2 ½points) Axon, hillock, myelin sheath, soma, dendrites 3. Name the 3 distinct phases of an action potential. (1 point each for 3 points) 4. a. What is myelin? (½point) b. What is its function in the myelin sheath? (1 point) 5. What is the general function of neuroglia? (½point) 7. a. Which neuroglia provides the myelin sheath in the CNS? (½ point) b. Which neuroglia provides the myelin sheath in the PNS? (½ point) 6. When an action potential reaches the presynaptic axon terminal it will lead to depolarization of the membrane triggering opening of voltage gated calciumchannels. What will result from the increase in calcium in the presynaptic axon terminal?(Seesynapsetab)(1 ½ points) 7. How does the CNS interact with the PNS? (1point)