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PDF Download FREE PHYSIOLOGY AND STUDY GAMES ABOUT A&P CH2
EXAM QUESTIONS
Actual Qs and Ans Expert-Verified Explanation
This Exam contains:
-Guarantee passing score -164 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation
Question 1: Acid + base ---> _____ + _____
Answer:
acid + base ---> water + salt
Question 2: What factors influence the speed of chemical reactions?
Answer:
- temperature
- concentration
- particle size (smaller particles move faster)
- catalysts (enzymes)
Question 3: What two building blocks are triglycerides composed of?
Answer:
- fatty acids
- glycerol
(in a 3-1 ratio)
Question 4: What does hemoglobin do?
Answer:
transports iron and oxygen Question 5: The more hydrogen ions in a solution, the more _____ the solution is.
Answer:
acidic
Question 6: What suffix is generally applied to enzymes?
Answer:
-ase (eg. lipase, lactase) Question 7: Why is it important that water forms HYDRATION LAYERS around large charged molecules such as proteins?
Answer:
it forms a biological colloid shielding the protein from other charged particles and preventing them from settling out of the solution.Question 8: What are the ONLY TWO polysaccharides that are important to the human body?
Answer:
- starch
- glycogen
Question 9: What unit is used for solutes in body solutions?
Why?
Answer:
millimoles.Because the concentration of solutes in body fluids tends to be quite low.
Question 10: define "amu"
Answer:
atomic mass unit
Question 11: What are enzymes called that are not pure protein?
Answer:
holoenzymes Question 12: what organ(s) regulate the homeostasis of acid-base balance in the body?
Answer:
kidneys and lungs
Question 13: What are the chief components of cell membranes?
Answer:
phospholipids
Question 14: What is a polar molecule?
Answer:
covalently bonded atoms that don't share their electrons equally. One atom attracts the electrons more strongly resulting in a negative charge, while the other atom takes on a positive charge.Question 15: What are substances that take up hydrogen ions (H+) in detectable amounts?
Answer:
Bases
Question 16: When are fatty acids referred to as being unsaturated?
Answer:
When they contain one or more DOUBLE BONDS between carbon atoms
Question 17: What are some examples of buffers?
Answer:
carbonic acid (H2CO3) and other weak acids Question 18: What specific name is given to decomposition reactions in which food fuels are broken down for energy?
Answer:
oxidation-reduction (redox) reaction
Question 19: What are radioisotopes?
Answer:
isotopes that are unstable and tend to decay/decompose releasing alpha and beta particles (gamma rays) Question 20: What type of reaction occurs within cells when food fuels are broken down for energy?What is produced in these reactions?
Answer:
oxidation-reduction reaction (redox reaction for short).
ATP is produced
Question 21: What is the rule of eight/octet rule?
Answer:
atoms tend to react in such a way that they end up with 8 electrons in their valence shell Question 22: How many times more H+ ions would a solution with a pH of 6 contain, vs a solution with a pH of 7?
Answer:
10 times more (because the pH scale is logarithmic)
Question 23: In an atom, each energy level holds how many electrons?
shell 1 = _______ shell 2 = _______ shell 3 = _______
Answer:
shell 1 =2 electrons shell 2 = 8 electrons shell 3 = 18 electrons
Question 24: What are the two parts of a holoenzyme?
Answer:
- apoenzyme- protein portion
- cofactor- non-protein portion
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