Chapter 1 Flashcards
Anatomy
Describes structures of the body
Physiology
Study of function
Gross anatomy
Examines large, visible structures (macroscopic)
Surface anatomy
Exterior features
Regional anatomy
Body areas
Systemic anatomy
Groups of organs working together
Histology
Study of tissues (microscopic)
Cytology
Study of cells (microscopic)
How is physiology divided?
By organ system; can also be specific to body chemicals (molecular) or cellular processes
Levels of organization
- Chemical
- Cellular
- Tissue
- Organ
- Organ system
- Organism
What are the 4 types of tissue?
Connective, epithelial, muscle, and nervous
What is the cycle of homeostasis?
Receptor, control center, effector
What is the negative feedback loop cycle?
Stimulus, receptor, control center, effector (response)
What makes a positive feedback loop different from a negative feedback loop?
The response of the effector increases change of the stimulus and moves the body further away from homeostasis.
Gradient
Unequal amount of something in 2 adjacent areas.
Three common gradients
Pressure, concentration, temperature
How does a gradient move?
A gradient will always move from an area of high concentration to an area of low concentration.
How do cells communicate?
Chemical messengers or electrical signals