DENT111 Introduction to Basic Sciences - Physiology PDF

DENT111 INTRODUCTION TO BASIC SCIENCES - PHYSIOLOGY EUROPEAN UNIVERSITY OF LEFKE FACULTY OF DENTISTRY ASSIST. PROF. DR. MEVHİBE TAMİRCİ COURSE CONTENT Introduction to Physiology Homeostasis, Negative and Positive Feedback Plasma Membrane Action Potential INTROD...

DENT111 INTRODUCTION TO BASIC SCIENCES - PHYSIOLOGY EUROPEAN UNIVERSITY OF LEFKE FACULTY OF DENTISTRY ASSIST. PROF. DR. MEVHİBE TAMİRCİ COURSE CONTENT Introduction to Physiology Homeostasis, Negative and Positive Feedback Plasma Membrane Action Potential INTRODUCTION TO PHYSIOLOGY  WHAT IS PHYSIOLOGY? Physiology is the study of the functions of living things. Specifically, we will focus on how the human body works. Physiology focuses on mechanisms of action. Two approaches are used to explain events that occur in the body; 1. the purpose of a body process and the 2. the underlying mechanism by which this process occurs. For example: “Why do I shiver when I am cold?” Answer: “to help my body warm up“ ??? WHY??? because shivering generates heat.” This approach, why body processes occur. Physiologists, however, explain how processes occur in the body. Difference between anatomy and physiology STRUCTURE FUNCTION In your education program: Introduction to Physiology (1st year first semester) Tissues (1st year second semester) Cranial nerves and sense organs (2nd year first semester) L evels of Organization in the Body  Chemical Level Cellular Level  The chemical level: Various atoms and molecules make up the body. Like all matter, both living and nonliving, the human body is a combination of specific atoms, which are the smallest building blocks of matter.  Basic chemistry of cells Oxygen - 65% Carbon - 18% Hydrogen (10%) Nitrogen (3%) Other elements include – Calcium – Phosphorous – Potassium – iron & other trace elements Organic molecules – contain CARBON & HYDROGEN Usually combined with nitrogen and oxygen NOCH - ~96% human body H2O - 65-90% of cell content 13  Basic chemistry of cells These common atoms and a few others combine to form the molecules of life, such as proteins, carbohydrates, fats, and nucleic acids (genetic material, such as deoxyribonucleic acid, or DNA). Proteins Nucleic acids Carbohydrates Lipids