Exam # 1 Intro Section Flashcards
All of the following are examples of the six major elements contributing to the body mass except:
sodium
The mass of an atom is:
the sum of its protons and neutrons
Which set of terms best describes a proton?
positive charge, 1 amu, in the nucleus
The subatomic particle responsible for the chemical behavior of atoms
electron
Acids:
release protons when dissolved in water
pH means
potential of hydrogen
8.2 on the pH scale indicates:
Basic for humans, and outside of the homeostatic balance zone
6.3 on the pH scale indicates
Acidic for humans, and outside of homeostatic balance zone
Assuming a condition of metabolic acidosis, which is true?
Bicarbonate levels in the plasma are low
The kidneys are adding new bicarbonate ions to the blood to increase alkaline reserve
Most compounds in the biological fluids are in the form of ions since the atoms in the compounds are stable in fluid by losing or taking on an electron with no charges in protons
True
Osmolality of a substance means:
the number of osmoles per kilogram of solvent
In a beaker of water, the water-water bonds can properly be called:
hydrogen bonds
The compound we know as water has a polarity that makes its two bonds not aligned, & the oxygen nucleus attracts the bonding electrons more strongly than the hydrogen nuclei do. The fact gives water some interesting qualities. Which of the below is NOT one of them?
water mixes with nonpolar compounds
If water is placed on one side of a membrane permeable to water but not to the solute, and an equal volume of a solution of the solute is placed on the other side, the water molecules will move “down their concentration gradient” into the solution
true
O2– (O2minus) is:
a radical
