Chapter 1.Introduction. Section I subjects studied in Physiology. 冯鉴强 教授. Concept of Physiology. Physiology belongs a branch of biology What is Physiology?.
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Section I subjects studied in Physiology
(1) Cell and Molecular level
The basic living unit of the body is the cell, and each organ is an aggregation of many different cells held together by intercellular supporting structures.
Cell level research to understand the function of the organ.
molecular biological methods for molecular level and cell level research
The conditions in the body are so complicated to analyze the results.
(2) extracellular fluid 1/3
(2)interstial fluid and fluid inside the cavaties (greater periotoneal body cavaty etc.) 3/4
(2)the control process maintaining the constant conditions of internal environment
the hormones secreted by endocrine glands act on the receptors of cells
(2)local chemical regulation: paracrine
Sympathetic nerve excites->E.P and noradrenaline secreted by medulla of adrenal gland->α、ß receptors excitation in cardiac vascular system-> heart rate↑ and blood vessels contract -> BP↑
(1)Non – automatic control system (非自动控制系统) belongs open loop system(开环系统)
(2)Positive feedback: the more product of result you have, the more you get.