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PDBIO 305: Physiology Introduction - Week 1

by: Kirsten Notetaker

PDBIO 305: Physiology Introduction - Week 1 PDBIO305

Marketplace > Brigham Young University > Physiology and Developmental Biology > PDBIO305 > PDBIO 305 Physiology Introduction Week 1
Kirsten Notetaker
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About this Document

These notes include a information on extra credit options for the class, as well as a few basic introductory principles of physiology (i.e. what is physiology, homeostasis, etc.).
Human Physiology
David Thomson
Class Notes
Physiology, homeostasis




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This 2 page Class Notes was uploaded by Kirsten Notetaker on Wednesday September 7, 2016. The Class Notes belongs to PDBIO305 at Brigham Young University taught by David Thomson in Fall 2016. Since its upload, it has received 84 views. For similar materials see Human Physiology in Physiology and Developmental Biology at Brigham Young University.

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Date Created: 09/07/16
Human Physiology **Physiology extra credit options:** 1) BYU sugar rush 5k run ($12, October 8th) Price goes up on September 9th or so 2) Attend physiology related seminar & write 1 page report about what it was & what you learned Can do both, but only credit for 1 Physiology = study of body function Anatomy = study of body structure We study function, but function is still very dependent on structure! Body Organization Systems, layers of tissue organization, etc. Although we call a muscle muscle tissue, there are actually many types of tissue within an actual muscle besides muscle tissue Homeostasis – maintenance of a constant internal environment Relies on feedback – responses made after change has been detected Negative or positive Negative feedback is primary type of homeostatic control Opposes an initial change Components: sensor, control center, effector Sensor – monitors magnitude of a controlled variable Control center – compares sensor input w/ set point Effector – makes a response to produce a desired effect Positive feedback – not as common as negative Amplifies an initial change *Note: Important to be specific in this class! I.e. “oxygen” vs. “air” Teleologically speaking = what was the purpose of something happening? Ex: We breath harder when exercising because we need more oxygen Mechanistically speaking = what caused it to happen? (how did it happen?) Ex: Increased levels of carbon dioxide are detected by sensory receptors, which signal to the brain the need for more oxygen. The brain in turn signals the lungs to breath faster and/or deeper. In this class we usually speak mechanistically


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