Answer: Hydrogen-3 or tritium as it is commonly called, has a half life of 12.32 years. If you start with 20 grams of it, how much will remain after 25 years? Ending Amount = Beginning Amount / 2 (time / half-life) Ending Amount = 20 / 2 (25 / 12.32) Ending Amount = 20 / 2 (2.0292) Ending Amount = 20 / 4.0818. Ending Amount = 4.8997 grams
Explanation:
Answer:
Synaptic impulse transmission takes place from presynaptic to postsynaptic neuron. When nerve impulse reaches presynaptic terminal, calcium ions flow in. This prompts secretory vesicles stored inside axonic terminal to burst and release neurohumor substances in synaptic cleft.
Explanation:
The alimentary canal includes mouth, esophagus, stomach, small intestine, and large intestine. As food passes through the alimentary canal, it is exposed to the different chemical secretions from the organs of the alimentary canal, as well as from other organs, such as liver and pancreas.
First, in the mouth, salivary glands produce saliva which <span>contains enzymes involved in the food digestions. After the food is passed to the esophagus, it produces mucus to help passage of the food. In the stomach, acid and pepsinogen, as well as mucus are produced. All of these secretions help food digestion. Small intestine also produces some digestive enzymes. Further, bile from liver and enzymes from pancreas are secreted via ducts into small intestine. Finally, large intestine secretes mucus for lubrication.</span>
Hello!!
-A local conservation issue would be endangered species/animals. With the amount of animals that are on the endangered/threatened species list decrease the amount of food that we can eat, such as fish. Fish produce calcium carbonate, which helps lower the amount of CO2 produced and keep the waters from becoming too acidic. If you save the fish, you could also help save the environment.
Reflect:
-I chose this topic because this is something that should be paid more attention to help save them.
-I can stop overfishing so the fish can help keep down the amount of carbon and acidity in the water.
-Explain how they help our oceans/waters. Persuade people to stop overfishing and depleting the amount of fish in our waters.
I hope I helped!! This was just to give you a couple of thoughts. Add more on if you want to. Have a great night, Pjj3!! :)
