In this lesson, you will learn about how living organisms maintain steady internal conditions through a series of mechanisms collectively called homeostasis. You will learn about the internal controls or feedback systems, structure of the neurons help maintain steady conditions and how a cell establishes a resting potential.
By the end of this lesson, students should be able to
- define homeostasis, feedback systems, receptor/sensor, integrator/control centre, effector, neurons, central nervous system (CNS), peripheral nervous system (PNS), axon, axon hillock, presynaptic terminal, postsynaptic terminal, glia cells and resting potential.
- explain how positive and negative feedback systems work and how they help maintain homeostasis in living organisms.
- describe the structure and roles of neurons and its types including: sensory neurons, interneuron, and motor neuron
- explain how a neuron establishing a resting potential using an artificial membrane and beaker compartments.
- describe how equilibrium potential (in mV) for K+ and Na+ ions are calculated using the Nernst Equation
Let’s start by examining the principles governing homeostasis and feedback system in the video lesson below. Once again watch this video lesson and take detailed notes
The second video lesson introduces the structures and processes of the Nervous system and how information in the form of electrical potential travel throughout the body. Please watch this video lesson, and take detailed notes.
Neuron Structure Activity.
Watch the animation below on the structure of a neuron and then write down all answers provided in your notebook.