BMS 308 - Exam 1 (Ch. 1-4)

-study of biological function
-HOW the body works

1. Mechanisms
2. Cause and Effect Sequences
3. Regulation

1. Muscle
2. Nervous
3. Epithelial
4. Connective

1. function is movement of skeleton
2. voluntary and striated
3. fibers are long, thin, and multi-nucleated

1. found in heart
2. involuntary and striated
3. fibers are short and branched

1. found in 'tubes' in body
2. involuntary and non-striated
3. allows for regualtion of movement of substances through tube

1. Neurons - nerve cells that are specialized for the generation and propagation of action potentials
2. Neuroglia - cells that provide anatomical and functional support to neurons

1. dendrite - recieves info
2. cell body
3. axons - sends info

-consists of cells that form membranes that cover and line body surfaces and of glands that are derived from these membranes

1. Where body fluids must be kept separate from external environment (skin, lining of lungs, GI)
2. In hollow organs where fluids in lumen must be kept separate from surrounding body fluids (blood vessels)

1. Exocrine - secrete molecules to the outside of epithelial membrane through ducts (secrets externally)
2. Endocrine - secretes hormones into the blood (secretes internally)

1. provide physical support for other tissues (anchor them in place)
2. link tissues together either physically or functinally

1. Connective Tissue Proper - dermis of skin, collagen, adipose, tendons (muscle to bone) and ligaments (bone to bone)
2. Cartilage
3. Bone
4. Blood
5. Lymph

-ranges from 45-75% of body weight
-avg male is 60%
-avg femal is 50% (females have more fat, less muscle)

1. Intracellular fluid has most total body water
2. extracellular fluid
3. plasma
4. intersitial fluid