What are the main 4 elements in the human body?
-sour taste, can dissolve metals, and burn a hole in your rug
- bitter taste
How are acids and bases reflected in a pH?
Based on the number of protons in a solution
Deoxyribonucleic Acid - The genetic material found within the cell nucleus.
- Replicates itself before a cell divides
-provides instructions for building every protein in body
- long double chain
Ribonucleic Acid - located outside the nucleus
- "molecule slave" of DNA
- carries out orders for protein synthesis
-large bonded molecules
-carbohydrates, lipids, proteins, nucleic acids
-small and simple molecule
(ex. water, salts, acids, bases)
What is the most abundant inorganic compound?
positively charged ions
negatively charged ions
What regulates acid/base balance in the body?
an organic compound containing nitrogen, carbon, hydrogen, and oxygen. The building block of proteins.
the number of protons in an atom
What are the building blocks of proteins?
Explain acids/bases and the pH scale.
pH 7 is the mid-point of the scale, it's neutral (distilled water, human blood and semen) Anything above 7 is acidic and anything below 7 is basic
What is an isotope?
-different atomic form of the same element
- contains a different number of neutrons
-heavier and unstable
- same number of protons and electrons and has the same atomic number but a different atomic weight.
lipids (also give a food example)
A large diverse group of organic compounds
-Fatty meats, egg yolks, milk, oils
-Insoluble in water but dissolves in other lipids
-Triglycerides are the most abundant
carbohydrates (also give a food example)
-Sugars and Starches and provides a source of food energy for the cells
-Contain hydrogen, oxygen, and carbon
proteins (also give a food example)
-50% of body is made up of proteins.
-double sugars that are formed with 2 simple sugars are joined by synthesis.
-many sugars/ complex
found in animal tissues and formed the same way as starch.
-Either fatty acids or glycerol
-liquid at room temperature
-solid at room temerature
oils that have been solidified by addition of hydrogen atoms at sites of double carbon bonds (increases risk of heart attack and includes foods with a longer shelf life)
omega-3 fatty acids
decreases the risk of heart disease (fish)
-similar to triglycerides and contains phosphorus
-cholesterol (meat, eggs, cheese)
most important steroid molecule
fibrous (structural) proteins
-provides strength in certain body structures
-bones, cartilage, tendons, hair, nails
globular (functional) proteins
-vital in all biological processes
a biological catalyst that regulates every chemical reaction within the body