If a cell is non-selectively engulfing samples of extracellular fluid, for example to absorb nutrients, it will likely utilize
pinocytosis
receptor-mediated endocytosis
phagocytosis
exocytosis
The Correct Answer is A
A. Pinocytosis: Pinocytosis is a form of endocytosis in which the cell non-selectively engulfs extracellular fluid and dissolved solutes into small vesicles. This allows the cell to absorb nutrients and other molecules from the surrounding environment without targeting specific substances.
B. Receptor-mediated endocytosis: This process is selective, relying on receptors to bind specific molecules before internalization. It is not used for non-selective uptake of extracellular fluid.
C. Phagocytosis: Phagocytosis involves the engulfment of large particles, such as pathogens or cell debris, rather than fluids. It is not the main mechanism for absorbing soluble nutrients.
D. Exocytosis: Exocytosis is the process of exporting materials from the cell via vesicle fusion with the plasma membrane. It is the opposite of endocytosis and does not bring extracellular fluid into the cell.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. 10: If atom X has 17 protons, it is chlorine. Its total electrons in the neutral state are also 17. Having 10 electrons in the valence shell would be impossible, since the outermost shell of chlorine can hold only up to 8 electrons.
B. 3: Three valence electrons are characteristic of elements in Group 13, such as aluminum. Chlorine belongs to Group 17, so it does not have three electrons in its outer shell.
C. 5: Five valence electrons correspond to elements in Group 15, such as nitrogen or phosphorus. Since chlorine is in Group 17, it cannot have five electrons in its valence shell.
D. 7: Chlorine has an electron configuration of 1s² 2s² 2p⁶ 3s² 3p⁵, which totals 7 electrons in its outermost shell. This matches its placement in Group 17, making 7 the correct number of valence electrons.
Correct Answer is A
Explanation
Ionic bonds occur when one atom donates one or more electrons to another atom, resulting in oppositely charged ions that attract each other. This transfer typically happens between metals, which lose electrons, and nonmetals, which gain electrons. The electrostatic attraction between the positive and negative ions forms a stable ionic compound, such as sodium chloride.
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