What contributes to the calculation of the mass number?
A) sum of electrons and neutrons B) sum of protons, neutrons, and electrons
C) sum of protons and electrons D) sum of protons and neutrons
Answer: D
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While looking at a sample of blood in a microscope, you see a purple-stained cell that is markedly larger than a red blood cell (about two to three times larger). It has a large kidney-shaped nucleus. What type of blood cell is this?
A. An eosinophil B. A basophil C. A neutrophil D. A monocyte
The process in which the frequency of nerve impulses in the first-order neuron decreases during prolonged stimulus is called
a) selectivity. b) adaptation. c) perception. d) modality. e) transduction.
Match the function or term with the appropriate organic molecule.A. CarbohydratesB. LipidsC. ProteinsD. Nucleic acidsPrimary energy source
Fill in the blank(s) with the appropriate word(s).
Surfactant facilitates alveolar ventilation by
A. increasing the surface area for gas exchange. B. decreasing thoracic compliance. C. increasing the surface tension between fluid and the alveoli. D. attracting water to the alveolar surface. E. decreasing the surface tension between water molecules on the lining of the alveoli.