Which of the following membrane activities requires energy from ATP?

A) facilitated diffusion of chloride ions across the membrane through a chloride channel
B) movement of Na+ ions from a lower concentration in a mammalian cell to a higher concentration in the extracellular fluid
C) movement of glucose molecules into a bacterial cell from a medium containing a higher concentration of glucose than inside the cell
D) movement of carbon dioxide out of a paramecium


B

Biology & Microbiology

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Inhibition of the flexor muscle during the knee-jerk reflex is an example of:

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Which of these leukocytes are the most abundant and begin to phagocytize pathogens to reduce the spread of infection?

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