A capillary wall cell membrane brings in particles dissolved in liquid by pinching off part of the membrane. This process would best be described as:
exocytosis
pinocytosis
cytolysis
phagocytosis
The Correct Answer is B
A. exocytosis: This is the process of expelling material out of the cell, not taking it in.
B. pinocytosis: Pinocytosis is "cell drinking"-the process of engulfing dissolved particles in fluid by invagination of the plasma membrane.
C. cytolysis: Cytolysis refers to cell bursting, not intake of particles.
D. phagocytosis: Phagocytosis is "cell eating", where the cell engulfs large solid particles like bacteria, not liquids.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. give up all seven electrons, acquiring a positive charge: Fluorine has 7 valence electrons and needs 1 more to complete its outer shell; it’s unlikely to give up 7.
B. to be nonreactive with other atoms: Nonreactive atoms have full outer shells, like noble gases. Fluorine is highly reactive.
C. to accept an electron from another atom, acquiring a negative charge: Fluorine is highly electronegative, so it gains 1 electron, becoming a negative ion (anion).
D. to give up four of its electrons, acquiring a positive charge: Fluorine doesn’t have four valence electrons to give; it wants one more, not to lose.
Correct Answer is B
Explanation
A. lipids: Lipids are not made of peptide bonds; they consist of fatty acids and glycerol.
B. enzymes: Enzymes are proteins, made of amino acids linked by peptide bonds. Denaturation alters the protein's structure and function.
C. nucleic acids: Nucleic acids (DNA/RNA) are composed of nucleotides, not peptide bonds.
D. eicosanoids: Eicosanoids are lipid-derived signaling molecules, not proteins.
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