Chapter 1-3 Flashcards
Tissues
Group of cells that work together towards a common goal
What are the components of the extracellular matrix?
Proteoglycans=glycoproteins
Insoluble proteins
Insoluble Proteins
Hold the body together
Collagen, Fibronectin, Laminin
Cell Adhesion Molecules (CAMs)
Facilitate cellular junctions
Cadherins and integrins
Epithelial Tissues
Cover the surface of tissues
One or more layers of cells attached to underlying tissues by basement membrane
-Can be simple or stratified
Skeletal Muscle
Attached to bones via tendons
Voluntary, striated
Many nuclei
Maintain body position and temperature
Cardiac Muscle
Found in wall of heart
Involuntary, striated
Gap junctions (allow for heart contractions)
Smooth Muscle
Lining of hollow organs and tubes
Involuntary, not striated
Gap junctions (allow for coordinated contractions)
Glial Cells
Support, surround, and nourish neurons
Neurons
Receive and transmit nerve impulses
Major components of homeostatic unit
Sensors
Integrating centers (brain/spinal cord)
Effectors (muscle glands)
Sensors
- Major component of homeostatic unit
- Receptors that collect info about internal and external environment
Positive Feedback Loops
Amplify change
Negative Feedback Loops
Pathway to prevent change
Spinal reflexes
Do NOT involve the brain
Body reacts before brain feels pain
