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A&P Chapter 2

Anatomy and Physiology

QuestionAnswer
Jenny mixes up a batch of pancake batter, then stirs in some chocolate chips. As she is waiting for the first few pancakes to cook, she notices the chocolate chips sinking to the bottom of the clear glass mixing bowl. The chocolate-chip batter is a ______ Suspension
A biologist isolates a large, unidentified molecule from some cells in his lab. What type of reaction could he initiate to determine whether the molecule is a polymer and, thus, a macromolecule? Hydrolysis
Which of the following statements about chemical bonds is true? Covalent bonds are stronger than ionic bonds
Which of the following statements correctly identifies and describes the type of covalent bond found between oxygen and hydrogen in water molecules? polar covalent bonds because oxygen is more electronegative than hydrogen
Consider the following chemical equation which depicts the mechanism by which humans maintain an acid-base balance in the blood: H+ +HCO3-↔H2CO3↔H20+CO2 What happens if the carbon dioxide on the right is not removed from the blood via the lungs? The reaction will be driven toward the left, resulting in the blood becoming more acidic
When an atom donates an electron to another atom, it becomes a(n) Ion
An oxygen molecule (O2) is bound tightly together sharing 2 electrons. Which type of bonding holds O2 molecules together? double covalent bonding
________ reactions release energy. Exergonic, Decomposition, Catabolic
The smallest unit of an element that still retains the distinctive behavior of that element is an ________. Atom
________ reactions store energy. Anabolic, Synthesis, Endergonic
On the periodic table of the elements, mercury (Hg) has an atomic number of 80 and a mass number of 200.59. It has seven stable isotopes. The most abundant of these probably have ________. 80
Four elements that make up more than 95% of the body's mass Hydrogen, Oxygen, Carbon, Nitrogen
True or False: H2 is a molecule, but not a compound. True
A substance formed of crystals of equal numbers of cations and anions held together by ionic bonds is called a(n) ________. Salt
AB → A + B is a general notation for a(n) ________ reaction. Decomposition
Ice floats because water molecules have slight positive and negative charges that causes them to stick together when liquid then push apart right at the freezing point. Which type of bonding holds water molecules together in this way? hydrogen bonding
The following statement correctly identifies and describes the type of covalent bond found between two oxygen molecules nonpolar covalent bonds because oxygen share electrons equally
The energy stored in a foot of snow on a steep roof is ________. potential energy
A team of researchers finds evidence for the presence of both cis and trans isomers of the molecule in a mixture of near-pure molecules. Which of the following must be contained in the new molecule? A Double-Bond
Which of the following statements correctly identifies and describes the type of covalent bond found between oxygen and hydrogen in water molecules? polar covalent bonds because oxygen is more electronegative than hydrogen
Nitrogen has an atomic number of seven. How many electron shells does it likely have? Two
How is a mass number known? By totaling the number of protons and neutrons in the nucleus of an atom. When more than one atom is used for calculation the mass number, an average ratio of the isotopes of the element is used to represent the total mass number.
A biologist isolates a large, unidentified molecule from some cells in his lab. What type of reaction could he initiate to determine whether the molecule is a polymer and, thus, a macromolecule? Hydrolysis
A molecule of ammonia contains one atom of nitrogen and three atoms of hydrogen. These are linked with ________. Polar Covalent Bonds
True or False: Covalent bonds are stronger than ionic bonds. True
Created by: Btownsley85
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