Answer :
A drug that blocks the action of the hormone cholecystokinin would affect the level of pancreatic secretions.
Cholecystokinin is a peptide hormone (made up of amino acids) that aids in fat and protein digestion. It achieves the function by contracting or stimulating gall bladder and pancrease to secrete their enzymes. Gall bladder has bile stored in it produced and transported by the liver.
Bile helps in emulsification of lipids this assisting it's digestion and movement into the enteric cells. Enzymes from pancreas are are protease, amylase and lipase. Protease acts on proteins, lipase acts on fatty acids and amylase acts on carbohydrates.
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