what is the oxygen cycle ?

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Answer 1
Oxygen cycle is the cycle which maintains the level of oxygen in the atmosphere.Oxygen from the atmosphere is used up during combustion, respiration and in the formation of oxides of nitrogen.This oxygen is returned to the atmosphere by lithosphere.This forms the oxygen cycle in nature.

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agonists generally _______ activity at the synapse while antagonists generally ______ activity at the synapse.

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Agonists activate the receptor thereby increasing activity at the synapse while antagonists generally prevent agonists from activating the receptors thereby decreasing activity at the synapse.

An agonist is the component that has the ability to increase the activity carried out by another substance.

The agonists work from their faculty of coupling to a cell-type receptor, in this way, they manage to generate a certain action in the cell.

The antagonists are the compounds that cause the opposite when they bind to the receptor, they cause a blockade by decreasing the activation of a synaptic receptor.

Therefore, we can conclude that agonists are compounds capable of increasing the action of synapse and blockers (antagonists) decrease activity at the synapse.

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The genetically programmed death of cells is called:

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Answer:

Apoptosis :)

Explanation:

which disease is caused when there isn't enough bile to breakdown fat and oil in food . And how is it caused​

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Exocrine pancreatic insufficiency (EPI) causes problems in how you digest food. Your pancreas doesn't make enough of the enzymes that your body needs to break down and absorb nutrients. Enzymes speed up chemical reactions in your body. The enzymes made by your pancreas move into your small intestine, where they help break down the food you eat. When you have EPI, you don't get the nutrition you need because your body can't absorb fats and some vitamins and minerals from foods. You might lose weight or have pain in your belly.

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