This is the second part of a series of slide presentations on YouTube focusing on the endocrine system. It immediately continues from the first part of the series by describing the action of protein-based hormones on target cells. In this series, protein-based hormones include polypeptides, glycoprotein and amines. First, a generalized example of signal transduction is given followed by the example of epinephrine. The presentation ends with emphasizing the benefits of amplification utilized in secondary messaging systems. The presentation is 11.5 minutes long. YouTube has automatically created a transcript, but because of the biological and chemical terminology it is grossly inaccurate and should be avoided.
This is the second presentation in the series on endocrine system by Mrs. Coleman for AP Biology classes. It introduces the concept of receptors and describes the mechanism of action of protein-based hormones on the target cells. Simple, step by step explanation of a secondary messenger system is given. The presentation also illustrates the benefits of a secondary messenger system.
Understand the signal transduction mechanism of protein-based hormones on target cells
Describe the benefits of secondary messenger systems
After completing this presentation, the learner would be able to:
explain the role of receptors in the functioning of protein hormones
describe a second messenger system
recognize the benefits of a second messenger system
Target Student Population:
Freshman, undergraduate courses
High school and college up through junior year.
Prerequisite Knowledge or Skills:
Understanding of cell biology, receptors and hormones.
Type of Material:
Educators. Can be used in class to enrich the learning experience. Can be recommended for supplemental use in the course.
Adobe Flash Player 10.0.22+ plug-in
Firefox 1.1+, Internet Explorer 7.0+, Safari 1.0+, Google Chrome, or Opera
Broadband connection with 500+ Kbps
Ability to play YouTube videos
Evaluation and Observation
Information is slowly built as the narrative goes on
Slides are high quality
Contents are clear and concise
Includes an adequate amount of material
Contents cover core curriculum within the discipline
Integrates the concept very well
Not informed by scholarship
Provide learning objectives or overview of what the presentation will cover (e.g. in the example with epinephrine, it should be stated that the receptor subtype for the example is a Beta receptor. Alpha receptors do not use the Gs pathway).
Potential Effectiveness as a Teaching Tool
Short, only two major concepts presented
very efficient; could learn a lot in a short time
builds up on prior concepts
demonstrates relationship between concepts
simple diagrams allow easy understanding of the core concepts
Narration does not include an overview of the presentation or identify specific learning objectives for the user
If transcript is used by individuals with auditory impairments, they will be completely confused