HUMAN STRUCTURE AND PHYSIOLOGY INTRODUCTION Tyler Agniel.

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Presentation transcript:

HUMAN STRUCTURE AND PHYSIOLOGY INTRODUCTION Tyler Agniel

TOPICS  Autonomic nervous system  Endocrinology  Cardiovascular physiology  Immunology  Respiratory physiology  Renal physiology  Digestion  Reproductive physiology Tyler Agniel

HOMEOSTASIS Tyler Agniel

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

FEEDBACK MECHANISMS Control system Sensor Set point adjustment Disturbance Error signal Inverted amplifier Negative feedback -

NEGATIVE FEEDBACK Beneficial e.g. perspiration  Disturbance (increase in body temp.)  Sensor (nervous system)  Inverted amplifier (decrease in temp.) Doesn’t prevent displacement Restores stability close to operating parameters (set point adjustment) Tyler Agniel

FEEDBACK MECHANISMS Control system Sensor Disturbance Signal Amplifier Positive feedback Output + Tyler Agniel

POSITIVE FEEDBACK Rare Mostly destructive e.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

CONTROL SYSTEMS Integration (CNS) StimulusResponse Effector (muscle, gland) Receptor (cell) AfferentEfferent Tyler Agniel

Thank You Tyler Agniel

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