Answer:
Ca2+ channels closed, Ca2+ pumps operating slowly: a, c, f
Ca2+ channels open: b, e, h
Ca2+ channels closed, Ca2+ pumps operating rapidly: d, g
Explanation:
Experimental technique: Tracking cytoplasmic Ca2+ distribution after a sperm enters the egg Based on what they knew about the fertilization envelope (a protective layer that forms around the egg when a sperm fuses with it), Steinhardt, Shatten, and their colleagues hypothesized that changes in the distribution of Ca2+ ions in sea urchin eggs are involved in the formation of the fertilization envelope. In sea urchin eggs (as in most eukaryotic cells) the concentration of Ca2+ ions is much higher in the endoplasmic reticulum (ER) than in the cytoplasm. To see how cytoplasmic Ca2+ concentration changes in the egg during fertilization, the researchers injected a Ca2+-specific fluorescent dye into the cytoplasm of unfertilized eggs. After adding sperm to the eggs, they observed the eggs with a fluorescence microscope. The following images show the changes in fluorescence that occurred after a single sperm entered the egg. The fluorescence of the dye increased with increasing cytoplasmic Ca2+ concentration. The green color indicates the region of the cell with the highest fluorescence at that point in time.
Sort the labeled regions of the fertilized egg above based on the status of the ER Ca2+ channels and Ca2+ pumps in that region.
Check the diagram attached.It includes the labeled region
Solution:
the name of the sheath that encases axons to protect them and increase the speed of communication between neurons is known as myelin sheath.
It is known as the insulating envelope of myelin that surrounds the core of a nerve fiber or axon and that facilitates the transmission of nerve impulses, formed from the cell membrane of the Schwann cell in the peripheral nervous system and from oligodendroglia cells. medullary sheath.
Thu the right answer is myelin sheath
Yes,
<span>plants have a thermal death point</span>
The endoplasmic reticulum aids in the production and movement of proteins and other materials through the cell.