Quiz 2 Flashcards
The simplest units of matter are A) Protons B) Electrons C) Neutrons D) Molecules
D) Molecules
If the atomic number of an element is 8, how many protons does the element contain? A) 4 B) 6 C) 8 D) 10
C) 8
Substances that release ions in water are called A) Catalysts B) Elements C) Electrons D) Electrolytes
D) Electrolytes
Ions with a positive charge are referred to as A) Cations B) Anions C) Atoms D) Electrolytes
A) Cations
Chemicals that resist pH changes are called A) Bases B) Acids C) Enzymes D) Buffers
D) Buffers
\_\_\_\_\_ are chemical bonds created by the electrical attraction between A) Hydrogen bonds B) Ionic bonds C) Sodium bonds D) Covalent bonds
B) Ionic bonds
Which of the following is not an example of an inorganic compound? A) Salt B) Glucose C) Water D) Base
B) Glucose
What reactions breaks molecules into smaller fragments (for example, AB----> A + B)? A) Replacement B) Synthesis C) Metabolism D) Decomposition
D) Decomposition
Which of the following substances would be the least acidic? A) White wine, pH=3 B) Stomach secretions, pH=1 C) Lemon juice, pH=2 D) Urine, pH=6
D) Urine, pH=6
Enzymes are organic catalysts that
A) Determine the nature of the products of a reaction
B) Are essential raw materials for a chemical reaction and are converted into some of its products
C) Alter the direction in which a chemical reaction proceeds
D) Increase the speed of a chemical reaction
D) Increase the speed of a chemical reaction
What is an essential function of epithelial cells?A) Control permeability
B) Produce specialized secretions
C) Provide physical protection
D) All of the above
D) All of the above
Any solution that has the same osmotic pressure as body fluid is referred to as A) Hypotonic B) Isotonic C) Hypertonic D) Normotonic
B) Isotonic
Crenation (shrinking) occurs when a blood cell is placed into which of the following solutions? A) Hypotonic B) Hypertonic C) Homotinic D) Isotonic
B) Hypertonic
The cell's DNA is located in the A) Lysosomes B) Mitochondria C) Nucleus D) Ribosomes
C) Nucleus
Glucose is passively transported across the cell membrane by binding to a receptor site on a carrier protein in a process called A) Facilitated diffusion B) Facilitated osmosis C) Assisted osmosis D) Assisted filtration
A) Facilitated diffusion
The organelles that manufacture proteins using information provided by the DNA of the nucleus, are called what? A) Flagella B) Ribosomes C) Proteasomes D) None of the above
B) Ribosomes
\_\_\_\_\_ is the net movement of molecules form an area of relatively high concentration to an area of relatively low concentration A) Molecular dispersion B) Diffusion C) Diluting D) Filtration
B) Diffusion
What is the diffusion of water across a cell membrane called? A) Osmosis B) Hydrogen Dispersion C) Concentration gradient D) None of the above
A) Osmosis
\_\_\_\_\_ are responsible for engulfing damaged cells or pathogens that enter the tissue A) Mast cells B) Macrophages C) Fibroblasts D) Melanocytes
B) Macrophages
\_\_\_\_\_ are proteins that destroy invading microorganisms A) Fibroblasts B) Antibodies C) Antibiotics D) Stem cells
B) Antibodies
\_\_\_\_\_ is an example of connective tissue A) Blood B) Bone C) Fat D) All of the above
D) All of the above
The watery matrix in blood is called A) A platelet B) Hematose C) Lymph D) Plasma
D) Plasma
What type of muscle is also known as striated voluntary muscle because it is controlled by the nervous system and has a striated appearance? A) Cardiac B) Synovial C) Smooth D) Skeletal
D) Skeletal
Which of the following is not one of the four types of membranes? A) Synovial B) Neural C) Serous D) Mucous
B) Neural
Which of the following is the most common type of cartilage? A) Osseous B) Fibrous C) Hyaline D) Elastic
C) Hyaline
