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
Some sort of liquid. if you add thinks like flour, it will get thicker. so water or milk
In 1 year
854
in 10 years
890
in 100 years
1250
Answer:
Human activity can affect the amount of carbon in the atmosphere. When fossil fuels like oil, coal, and natural gas are burned, carbon dioxide is released into the atmosphere as waste.
Explanation:
Answer:
The use of left arm is more compared to right hand
Explanation:
In the given question, the anthropologist when examines the left and right arm he found that the left arm is thicker than the right arm.
The more thickness of the left arm signifies that the person uses his left arm for the muscular work as the more use of hand increases the deposition of the calcium phosphate and sulfate in bones along with other material which increases the thickness for the bones and increases the strength.
Thus, The use of the left arm is more compared to the right hand is correct.