Biology

Biology, 05.07.2019 17:40, raveransaw

The cell junction that allows communication between cells, and provides a channel for small molecules up to 1000 daltons is a

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Biology, 09.07.2019 15:30, stephliu721

(there are 5 questions ) question 1 what is one difference between a cell wall and cell membrane? a) cell walls do not connect cell to cell. cell membranes only connect cell to cell b) cell walls contain vesicles. cell membranes contain plasmids c) only plant cells have cell walls. only animals have cell membranes d) the cell wall is a rigid structure. the cell membrane is flexible question 2 what structural feature of cells can allow molecules to flow directly from the inside of one cell to the inside of the next? a) plasmids b) chloroplasts c) cilia d) plasmodesmata question 3 when non-nerve cells become involved in response to signals, which type of receptor goes into action? a) endomembrane receptor b) ion channel linked receptor c) intracellular receptor d) enzyme linked receptor question 4 which is not an example of intercellular communication? a) control of cell division b) molecule in a cell changes function of cell c) molecular movement within a cell d) reaction to pheromones question 5 which is not an example of intercellular communication? a) a molecule stimulates a target cell via a receptor b) a message is distributed across plasma membrane c) an electrical signal cause muscle cells to contract together d) a message travels between gap junctions

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Biology, 23.10.2019 21:00, july00

Suppose you found a molecule a, which had a molecular mass of 1500 daltons, was able to penetrate the channels of a gap junction, but molecule b whose molecular mass was only 1200 daltons, was unable to diffuse between the same cells. how might these molecules be different so as to explain these results?

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Biology, 24.10.2019 06:43, alkinoonn

Match the following descriptions with the correct junction type. group of answer choices these junctions allow the passage of small molecules and ions from the cytosol of one cell to that of a neighboring cell. these junctions are found in epithelial tissue where they prevent paracellular movement of molecules. intermediate filaments penetrate the membranes between two cells at the site of protein plaques forming strong linkage between the two cells.

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Computers and Technology, 25.10.2019 23:43, Lilyy1k

Attending a small group meeting to learn about heart-healthy recipes is an example of a(n): group of answer choices mass media communication channel. interpersonal communication channel. organization & community communication channel. intrapersonal communication channel.

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