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HPNU 3060 Questions 1 Exam And 100% Complete Answers
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HPNU 3060 Questions 1 Exam And100% Complete Answers
Which of the following terms describes the change in membrane potential as it moves
from resting potential to -90 mV? - Answer hyperpolarized
Facilitated diffusion and active transport differ in that - Answer ATP is necessary for
active transport, but not for facilitated diffusion
Calculate the resting membrane potential for sodium if the extracellular fluid
concentration were 141 and the intracellular fluid concentration was 13. - Answer 61+
log(141/13) = 62
Total Body Water is approximately divided into: - Answer 60% Intracellular 40%
Extracellular (75% Interstitial 20% Plasma 5% Transcellular)
A solution that is hyposmotic to a cell will always be hypotonic to it as well. - Answer true
Which of the following membrane proteins binds with specific molecules and changes
shape to transport the molecules across the cell membrane. - Answer Carrier proteins
Gated channels for sodium ions may include - Answer mechanical gates, which respond
to pressure.
chemical gates, which respond to ligands.
voltage gates, which respond to electrical signals.
Answer: all of these
cell membranes are said to be - Answer selectively permeable
Which body fluid compartment contains high levels of Na+, low levels of K+, and almost
no large proteins and anions? - Answer plasma and ??
possibly intracellular fluid
normal saline contains ______ grams of sodium chloride per 100 mL of water - Answer
0.9
Which property of diffusion best helps explain the necessity of the circulatory system in
multicellular organisms? - Answer Diffusion is rapid over short distances but much
slower over long distances.
The correct order of the 5 basic steps in signal transduction are: - Answer Signal,
receptor protein, intracellular signals, target proteins, response
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