Final Exam- BIO 251 |120 Questions and Answers
tissues in the body are classified into which of the following four types? Correct Answernervous, muscle, epithelial, and connective
ion channels are examples of what type of membrane protein? Correct Answer-
transmembrane protein
which of the following is not a type of integral membrane protein? Correct Answer-an
intracellular receptor for a messenger
, Final Exam- BIO 251 |120 Questions and Answers
when molecules are passively transported across a membrane, the direction of their
movement is dictated by the molecule's tendency to move... Correct Answer-from higher
concentration to lower concentration
based solely upon its negative electrical charge, the inside of a typical cell will tend to attract
extracellular (blank) to move inward Correct Answer-cations
transporting a substance against its concentration gradient requires... Correct Answer-a
transporter that uses metabolic energy
most cells have a resting membrane potential of... Correct Answer--70 mV
what type of ion channels in the membranes of all cells allows ions to constantly move across
the membrane at rest and thereby contribute to the resting membrane potential? Correct
Answer-leak channels
which of the following best describes the electrochemical forces acting on sodium and
potassium ions across the cell membrane? Correct Answer-the force on sodium ions is to
move into the cell, and the force on potassium ions is to move out of the cell
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