Question: SOLVE A AND C AND PROVE WHY YOUR ANSWER MAKES SENSE ACCORDING TO LOGIC, REALITY A: FILLL IN MISSING NUMBERS C SAYS : Which Ions Must Be Actively Pumped Across The Membrane And In Which Direction ?
SOLVE A AND C AND PROVE WHY YOUR ANSWER MAKES SENSE ACCORDING TOLOGIC, REALITY
A: FILLL IN MISSING NUMBERS
C SAYS : which ions must be actively pumped across the membraneand in which direction ?
Transcribed Image Text from this Question
2. Here are some data for the marine alga Chatomorpha. The extracellular fluid is seawater; the “plasmalemma” (outer cell membrane) separates the outside from the cytoplasm; a second membrane (“tonoplast membrane”) separates the cytoplasm from an interior organelle, the vacuole (Section 2.1.1 on page 34). (In this problem we pretend that there are no other small ions than the ones listed here.) Ion Vacuole Cytoplasm Extracellular Nernst (plasmalemma) VNernst (tonoplast) (mm) (mm) (mm) (mV) (mV) K+ 530 425 10 ? -5.5 Na+ 56 50 490 +57 ? CI- 620 30 573 – 74 +76 a. The table gives some of the Nernst potentials across the two membranes. Fill in the missing ones. c. The actual measured membrane potential difference across the tonoplast membrane is +76 mV. Suppose all the quoted numbers are accurate to about 2%. Which ion(s) must be actively pumped
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