Chapter 1 - Intro to Human Anatomy and Physiology Flashcards
deals with structures of body parts
Anatomy
concerned with functions of body parts
Physiology
Why is it often difficult to separate anatomy from physiology and vice versa?
Because the function of a part depends on its form.
Smallest chemical unit
atom
Atoms are bound together to form these
molecules
Small molecules may combine to form these
macromolecules
The basic unit of structure and function in the body
cell
Composed of aggregates of large molecules; carry on specific activities of the cell
organelles
Organized cells in layers/masses that have specific functions
tissues
Groups of different tissues form these complex structures with specialized functions
organs
A group of organs that function closely together
organ system
Interacting organ systems make up a/an ___?
organism
Environment within the body in which the cells live
internal environment
Maintenance of a relatively constant internal environment
homeostasis
What is interdependency of cells?
different cells contribute to homeostasis in different ways
Name two types of gradients
- pressure gradient
* concentration gradient
Cell membrane controls what it allows in and out
permeability
Cells become specialized through this process
Cellular differentiation (gene leads to protein leads to function)
Cell membrane mechanisms
- determines what substances can enter or leave the cell
* responds to some signals, but ignores others
Uses specialized molecules on the membrane called membrane receptors
Cell-to-cell communication
an underlying component of the physiological control systems that maintain homeostasis
Feedback loops
Internal environment stays relatively constant; replaces substances that are lost and eliminates substances in excess
Balance
List the 10 requirements of life
- Movement
- Responsiveness
- Growth
- Reproduction
- Respiration
- Digestion
- Absorption
- Circulation
- Assimilation
- Excretion
Change in position of the body or of a body part; motion of an internal organ
movement