Major themes of A&P Chapter 1
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The study of structures and the physical relationship between body parts.
Simplest way to study human anatomy
Cutting and separation of organs to study their relationships
Study of more than one species to analyze evolutionary trends
Feeling structures with fingertips (taking pulse, feeling swollen lymph nodes)
Listening to the natural sounds made by the body (heart & lung sounds)
Examiner taps on the body and listens to the sound for signs of abnormalities (pockets of air)
Visible with the naked eye
Study of individual cells with a microscope
Study of tissue with a microscope
Study of how living organisms perform vital functions
What is the level of structural organization
- organ systems
Are composed of atoms, large molecules are called macromolecules
Organelles are microscopic structures in a cell that carry out their individual functions
What are tissues composed of?
What are organs composed of?
What are organ systems composed of?
Characteristics of life are?
- cellular composition
What is cellular composition
Living matter is always compartmentslized into one or more cells
The sum of all chemical processes that occur in the body and it can be divided into two parts
The breakdown of large complex molecules into simpler ones
Uses the energy from catabolism for body structure and function
The separation of wastes from the tissues and their elimination
Responding to change in their enviroment
What are the two ways development comes in
Unspecialized cells develop into specialized (ex-RBC, WBC, from same ancestor)
All living species exhibit genetic change from generation to generation and therefore evolve
Steady state condition allows the normal body to keep in balance by compensation with change
Homeostasis regulation usually involves a receptor sensitive to a particular stimulus and an effect or whose activity has and effect on the same stimulus
Negative feedback loop
A variation outside of normal limits triggers an automatic response that corrects the situation.
when the body senses a change and activates mechanisms to reverse it
What di an example of negative feedback loop?
Fasting sugar level when eats a box of doughnuts it goes up. Signal goes to pancreas then level goes down.
What is the structure of the feedback loop?
Control center that repsonds
Structures that restore homeostatsis
Positive feedback loop
The initial stimulus produces a response that exaggerates the stimulus.
self amplifying change-leads to change in the same direction
What is an example of positive feedback?
Childbirth when you have contractions (it goes in the same direction)
What is an bad example of positive feedback loop?
- High temperature
- increase metabolic rate
- the cycle continues to reinforce heat
- becomes fatal at 113* F
What would you like to do?
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