Transcription of Human Physiology (Biology 4) Lecture Notes
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Human Physiology (Biology 4) Lecture Notes
1 Human Physiology (Biology 4) Lecture Notes Updated July 2017 Instructor: Rebecca Bailey 2 Chapter 1 Homeostasis Anatomy - the study of body structure Physiology - the study of body function 1. mechanistic approach a. explain how events occur b. , you shiver because a drop in body T leads to signals for muscle contraction 2. teleological approach a. explain how a function fills a need, "why" b. , you shiver because you need to keep warm 3. both approaches can be useful in understanding concepts Levels of Organization - Chemical level 1. atoms and molecules - Cells 1. the basic unit of living things 2. humans are multicellular 3.
(µm = micrometer, 1/1000 mm, 1/1,000,000 m) - most cells have 3 major subdivisions 1. plasma membrane (cell membrane) a. defines inside/outside b. intracellular fluid (ICF) - inside cell c. extracellular fluid (ECF) - outside cell d. selectively permeable - controls movement of molecules between ICF and ECF 2. nucleus a. usually near cell ...
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