Following statements are regarding thyroid hormone biosynthesis?

I. The basolateral membranes of thyrocytes facing the capillaries contain a antiporter that transports two Na⁺ ions and one I^– ion into the cell with each cycle, against the electrochemical gradient for I^–.

II. Na⁺/I^– symporter (NIS) is capable of producing intracellular I^– concentrations that are 20–40 times as great as the concentration in plasma.

III. TSH induces both NIS expression and the retention of NIS in the basolateral membrane, where it can mediate sustained iodide uptake.

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#Question id: 28818

#Unit 2. Cellular Organization

Which of the following condition is involve to unfolds the myosin II, active and can assemble into bipolar filaments for contraction?

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#Question id: 26412

#Unit 3. Fundamental Processes

Which of the following is incorrectly matched with their function in E.coli and eukaryotes

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#Question id: 3999

#Unit 3. Fundamental Processes

Which statement is true about the relative number of accessory proteins necessary for RNA polymerization in eukaryotes versus E. coli?

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#Question id: 6954

#Unit 5. Developmental Biology

Between fertilization and the first cleavage division, actin filaments pull the cytoplasm of the frog egg toward the point of sperm entry in a process called:

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#Question id: 1103

#Unit 4. Cell Communication and Cell Signaling

An inhibitor of which of the following enzymes could be used to block the release of calcium from the endoplasmic reticulum?