Introduction to Physiology and Homeostasis
Introduction to Physiology
Physiology is the study of body functions.
Physiologists explain body function in terms
of cause-and-effect sequences.
Two approaches are used to explain events
Deliver oxygen (O2) to tissues
Remove excess CO2
Moisten incoming air
Cannot gas exchange across dry membrane
Enhance venous return
Defends against inhaled foreign
The Plasma Membrane and
Forms boundary of every cell.
Controls movement of molecules between ICF
Participates in joining cells to form tissues and
Plays important role in the ability of a
Cell Structure Overview
Cells have three major subdivisions:
plasma membrane encloses the cell
nucleus which contains DNA
cytoplasm the portion of the interior
not occupied by the nucleus
The plasma membrane