Study

For exam study, not clinical practice. Always follow your clinical instructors and current guidelines.

PHS-101 route
Unit 1 · Lesson 2 of 4 9 min

The Internal Environment and Homeostasis

Your cells live in a private ocean, and the whole body works to keep that ocean calm.

What this unit covers

Unit 1: Homeostasis and Feedback Control

  1. 1 Introduction to PhysiologyAnatomy tells you where the engine parts sit. Physiology tells you why the engine runs. · 8 min
  2. 2 The Internal Environment and HomeostasisYour cells live in a private ocean, and the whole body works to keep that ocean calm. · 9 min
  3. 3 Negative Feedback MechanismsMost of your body's control systems work by undoing whatever change set them off. · 10 min
  4. 4 Positive Feedback and Homeostatic ImbalanceSometimes the body needs to finish a job fast, so it presses the accelerator instead of the brake. · 9 min