Please answer and falsify each wrong answer and explain why the best answer is the answer....
Please answer and falsify each wrong answer and explain why the best answer is the answer. Thank you
Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent (neighboring) cell through
A. gap junctions.
B. intermediate filaments.
C. tight junctions.
D. desmosomes.
Homework Answers
A. Gap junction.
Gap junctions are channels between neighbouring animal cells that allows for the transport of ions, water and other substances. Functionally gap junctions are in animal cells are lot like plasodesmata in plant cells.
Gap junctions are particularly important in cardiac muscle, thet electrical signal to contract spreads rapidly between heart muscle cells as ion pass through gap junctions, allowing the cells to contract the tendem.
Gap junctions develope when a set of six membrane protein called connexon. When the pores or doughnot holes of connexons in adjacent animal cells align, a channel formed between the cells.
Tight junctions can not produce cytoplasmic connections between cells. Tight junctions create a water tight seal between two adjacent cells i.e prevent leakage of extracellular fluid.
Desmosomes act like spot welds between adjacent epithelial cells.
Intermediate filaments is to provide mechanical support for the plasma membrane.
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