Cortisol: Hormone secreted by the adrenal gland, a small gland located on top of each kidney. It has several important functions in metabolism, immunity, stress, etc.

Growth hormone: Hormone secreted by the pituitary gland, a small gland at the base of the brain. It promotes growth of the individual

Carcinoid tumor: A tumor consisting of special types of cells that secretes several hormones, especially serotonin

Proinsulin: Precursor of insulin that is made up of A-chain, B-chain and C-peptide

C-peptide: A part of proinsulin along with the A-chain and the B-chain. Cleavage of the C-peptide results in the formation of insulin. The C-peptide is released from the pancreatic cells along with the insulin

Intramuscular injection: An injection given into the muscle, for example into the muscle of the outer arm or buttock

Subcutaneous injection: An injection given just below the skin, for example, insulin injections

Intravenous injection: An injection given directly into the vein, often as drips

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