UNH Nutrition 400 Exam 2 Questions And Answers Rated A+
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Course
UNH Nutrition 400
Institution
UNH Nutrition 400
UNH Nutrition 400 Exam 2 Questions And Answers Rated A+
Levels of organization in the body ANS chemical, cell, tissue, organ, organ system, organism
Free Radical ANS molecules containing unpaired electrons; they are highly reactive and are found everywhere
Examples of free radicals ANS sm...
UNH Nutrition 400 Exam 2 Questions And Answers
Rated A+
Levels of organization in the body ANS chemical, cell, tissue, organ, organ system, organism
Free Radical ANS molecules containing unpaired electrons; they are highly reactive and are
found everywhere
Examples of free radicals ANS smoking, air pollution, UV light, lipids, protein, DNA
Acids ANS there is more cations so there is more positive charges
Bases ANS there is more anions so there is more negative charges
pH Scale ANS most acidic to the most basic;
- Neutral = 7
- Acidic = pH<7
- Basic = pH>7
Buffering systems ANS resist change is pH; found in the blood, kidneys, lungs; prevents
acidosis/alkalosis
Acidosis ANS - high acid
- symptoms: headache, loss of appetite
- starvation
- diabetes
Alkalosis ANS - high base
- excessive vomiting
, - overuse of diuretics/laxatives
- hyperventilation
Two types of transport methods ANS 1. passive transport mechanisms
2. active transport mechanisms
Passive Transport Mechanism ANS - simple diffusion
- facilitated diffusion
- osmosis
energy is not a requirement
Simple diffusion ANS when a substance crosses the cell membrane by moving from a higher
concentration to a lower concentration
Facilitated Diffusion ANS when a substance crosses a cell membrane with the assistance of a
transport protein(energy is not required)
Osmosis ANS when water crosses the cell membrane freely
- from a low concentration to a high concentration
- energy is not required
Active Transport Mechanism ANS - carrier- mediated active transport
-exocytosis & endocytosis
Carrier Mediated Active Transport ANS - needs energy
- when solute crosses a cell membrane with the assistance of a transport protein
- moves against its concentration gradient
- moves from a low concentration to a high concentration
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