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Physiology I

Lecture 1 - Test 1

What is the historical definition of physiologoy? Study of function - How does it work?
The study of living systems is what type of definition for physiology? Mechanistic Definition
What type of an approach veiws the human as more than just a sum of his/her parts? Vitalism
Why is physiology important? 1. Be able to understand the human body 2. Diagnosis 3. Explanations 4. Treatment 5. Understanding research and applications to your practice
What percentage range of the body is composed of water? 55% - 80%
The average % of water compostion for the adult body is? 56%
Normal full hydration is what percentage of water composition? 72%
The american surgeon general states ___________ is the next major medical problem in the U.S. Obesity
What country is the most obese population in history? U.S.
If you were to cash in the total amount of elements in your body to pay for your Chiropractic Education what dollar amount would you receive? $3.86
What ration of the bodies water is extracellular? 1/3
What ration of the bodies water is intracellular? 2/3
Water within the body is in constant motion via ________? Osmosis
What are the main ions found in extracellular and intracellular fluid? Na+, K+, Cl-
Other than Na+, K+, Cl- what else is found in extracellular and intracellular fluid? Nutrients, O2, Glucose, Fatty Acids, Amino Acids, Cellular Waste Products such as: CO2, H+, and large amounts of Heat.
What nutrients are found in intracellular fluid? O2, Glucose, Fatty Acids, and Amino Acids
Who came up with the concept of Homeostasis? Claude Bernard
What is homeostasis? The maintenance of constant internal conditions - Temp., pH, osmolality, fluid vol., blood gasses, nutrition, waste removal, metabolism, ion concentrations, etc.
What regulates homestasis? 1. Nervous Control 2. Endocrine Control 3. Reproduction 4. Intrinsic Control
What is the function of intrinsic control? Trys to maintain the same position
How many homeostatic controls are in the human body? Thousands
What is the function of homeostatic controls? Maintain intra and extracellular environments
How are Homeostatic Controls regulated? Negative Feedback, Positive Feedback, and Feedforward
How many systems maintain blood circulation? 9
How many systems maintain ion concentration? 22
The more systems that maintain a particular function - the more important that function is. What is the purpose of having numerous systems governing 1 function? It provides a fail safe in that if one of the sytems is impaired than the body can still carry out normal funcion through the remaining systems
Which regulatory method acts like a thermostat? Negative Feedback
What is the measure of effectiveness of a system? Gain
How is Gain calculated? Compensation / Study State Error
What is the % effeciency of body temp. regulation? 93% - 97%
What type of regulatory method makes compenstaions before changes actually occur? Feedforward or Adaptive - this requires two or more sensors
Name two examples of feedforward or adaptive mechanisms? 1. Temp. regulation 2. pH regulation
What type of homestatic control system is the least common in the human body? Positive feedback
A stimulus to increase stimulus that leads to an event which stops the process describes what type of regulatory method? Positive feedback
What is most common cause of positive feedback mechanisms? Typically a pathological cause
Name 3 examples of nonpatholgical types of positive feedback mechanisms? 1. Blood Clot Formation 2. Parturtion (childbirth) 3. Generation of neural impulses
Created by: Tri 2



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