Primary lymphatic organs include the ________.
A. tonsils and spleen
B. red bone marrow and lymph nodes
C. thymus and lymph nodes
D. red bone marrow and thymus
Answer: D
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Surfactant helps to prevent the alveoli from collapsing by ________.
A) humidifying the air before it enters B) warming the air before it enters C) interfering with the cohesiveness of water molecules, thereby reducing the surface tension of alveolar fluid D) protecting the surface of alveoli from dehydration and other environmental variations
During embryological development the body first developed into ________ primary germ layers. (Note: Be sure to spell out your answer).
Fill in the blank(s) with the appropriate word(s).
Which is an accurate description of glucose and sucrose?
A. Glucose is a monosaccharide, sucrose is a polysaccharide, both molecules are starches. B. Glucose is a disaccharide, sucrose is a glycolipid, both molecules are essential nutrients. C. Glucose is a disaccharide, sucrose is a monosaccharide, both molecules are lipids. D. Glucose is a monoamine, sucrose is a dipeptide, both molecules are acidic. E. Glucose is a monosaccharide, sucrose is a disaccharide, both molecules are carbohydrates.
Match the name of the wave with the correlated event.
1. immediately followed by ventricular contraction 2. atrial contraction 3. ventricular repolarization 4. ventricular depolarization 5. atrial depolarization