5 Written questions
5 Matching questions
- Herophilus (300 BC)
- Shell Temperature
- Survivable Ambient Temperature Range
- Walter Cannon (1871-1945)
- a Skin and oral cavity temperature. Fluctuates with ambient temperature. Slightly lower than rectal temperatures. Varies between 98 °F and 98.6 °F.
- b Coined the term "homeostasis" - the body's tendency to maintain relatively stable internal conditions (the CENTRAL unifying concept of physiology).
- c 22% of heat loss. Sweat glands and exhalation provide liquid. Water off skin and out of lungs occurs at a rate of 450-600 mL/day = 12-16 kcal/hour of heat.
- d Exposure to cold temperatures down to 55 °F or hot temperatures up to 130 °F. (Subject nude in dry air.)
- e Greek; conducted the first recorded physiological experiments; dissected the bodies of LIVING criminals; eventually even cadaver dissections outlawed; during the next 1900 years, not much was done in the field of physiology.
5 Multiple choice questions
- Increased by thermogenesis: Shivering and Chemical.
- BIG Idea "The internal conditions of the body remain fairly stable even when external conditions are highly variable. The body is never at rest, but is constantly undergoing dynamic changes." Purpose of these changes was to maintain an internal equilibrium; physiology became a separate science.
- Increased body temperature not caused by fever. Hypothalamus is overheated (105-108 °F) and cannot regulate temperature causing heat cramps, heat exhaustion, and heat stroke.
- (homeostasis) Balanced change in which conditions fluctuate within a given set point.
- Comprised of different organs having a common function.
5 True/False questions
Autonomic Control (Sweating) → Receives sensory input and compares it to the desired value (set point).
Tissue → Different types of cells with the same intercellular substance; have a specific function.
Carbohydrates (Cell Membrane) → * Isolates the cell
* Regulates the intracellular and extracellular ionic environment
* Comprised of a phospholipid bilayer
Hippocrates (460-377 BC) → Greek; natural events have natural causes; a physician's main role was to assist the body's own healing power; no invasive techniques; "In disease, look to the spine first."
Phospholipid Bilayer → Low permeability to water-soluble substances (e.g. ions, glucose, and amino acids), but permeable to lipid-soluble substances (e.g. fatty acids, oxygen, and carbon dioxide).