The Ultimate A&P I Lab Chapter 4 Exam Prep Bundle | 2026/2027 | Practice Questions, Answer Key & Expert Explanations

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A&P I Lab Chapter 4 - Craig
Wilmhoff




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, True True or False?
Na^+ -K^+ pumps are active forms of transport.



True True or False?
Na^+ -K^+ pumps consume about half of your daily energy expenditure.



True True or False?
Na^+ -K^+ pumps have six binding sites for reactants (3Na^+, 2K^+, 1 ATP).



True True or False?
Na^+ -K^+ pumps are enzymes that hydrolyze ATP into ADP and Pi.



False True or False?
Na^+ -K^+ pumps create a Na^+ gradient from the ECF to the ICF.



False True or False?
Na^+ -K^+ move 3 molecules of sodium to the ICF per cycle.



False True or False?
Glucose is passively absorbed through Na^+ -K^+ pumps during secondary
active transport.


False True or False?
Na^+ -K^+ pumps move sodium down its concentration gradient.



False True or False?
Use of the term "pump" refers to moving solutes down their respective
concentration gradients.


False True or False?
After death, Na^+ -K^+ pumps can continue to function indefinitely.



False True or False?
Na^+ -K^+ pumps bind ATP in the ECF.



False True or False?
Na^+ -K^+ pumps are antiporters that participate in cotransport.



- Crenation When a red blood cell is placed in a hypertonic solution, which of the following
- Intracellular volume will decrease may occur?



Increases rate of diffusion Match each condition to its effect on diffusion rate.
Increased temperature



Increases rate of diffusion Match each condition to its effect on diffusion rate.
Increased membrane surface area



Increases rate of diffusion Match each condition to its effect on diffusion rate.
Decreased cell height, creating a flatter cell