Human Structure and Physiology - PowerPoint PPT Presentation
Title:
Human Structure and Physiology
Description:
Anatomy is the area of science that deals with the structure of a life form, also called an organism. This includes its external appearance and features as well as its internal ones. Simply put, the study of anatomy is the study of an organism's form and parts. – PowerPoint PPT presentation
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Title: Human Structure and Physiology
1
Human STRUCTURE and Physiology
- Introduction
Tyler Agniel
2
Topics
- Autonomic nervous system
- Endocrinology
- Cardiovascular physiology
- Immunology
- Respiratory physiology
- Renal physiology
- Digestion
- Reproductive physiology
Tyler Agniel
3
Homeostasis
Tyler Agniel
4
Homeostasis
- All organs interact
- All cells of organs bathed in internal fluid
- Cells exist if fluid remains constant in quantity
and quality (osmosis) - Fluctuations occur within narrow limits
Serge Francois
5
Feedback Mechanisms
Disturbance
Negative feedback
-
Error signal
Control system
Sensor
Inverted amplifier
Set point adjustment
6
Negative feedback
- Beneficial
- e.g. perspiration
- Disturbance (increase in body temp.)
- Sensor (nervous system)
- Inverted amplifier (decrease in temp.)
- Doesnt prevent displacement
- Restores stability close to operating parameters
(set point adjustment)
Tyler Agniel
7
Feedback mechanisms
Disturbance
Positive feedback
Signal
Control system
Sensor
Amplifier
Output
Tyler Agniel
8
Positive Feedback
- Rare
- Mostly destructivee.g. congestive heart failure
- Disturbance (inability of heart to pump blood)
- Sensor (nervous system)
- Amplifier (increase in heart muscle contraction,
further impeding pumping ability)
Tyler Agniel
9
Control systems
Stimulus
Response
Integration (CNS)
Receptor (cell)
Effector (muscle, gland)
Afferent
Efferent
Tyler Agniel
10
Thank You
Tyler Agniel
