Scientists wanted to study the ghrelin pathway and to do so, they first needed to determine which tissues in the body ghrelin functions in. Please specify the tissue(s) they should begin their studies with?

Stomach

Explanation:

Ghrelin is an amino-peptide hormone which is secreted by the stomach and is involved in the activation of nucleus and growth receptors present in the hypothalamus.

The ghrelin is known as the hunger hormone as it is produced by the stomach just before the mealtime and then activates the nucleus in the hypothalamus to produce sensation fro appetite.

So, if the scientist wanted to study the ghrelin pathway, they must first determine the ghrelin producing tissue in the body that is the stomach.

Thus, the stomach is the correct answer.

compost can be added to topsoil as a:

pesticide

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