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Glucagon: Quiz


Question 1: The polypeptide has a ________ of 3485 daltons.
Molar massHydrogenMolecular massDeuterium

Question 2: The hormone is synthesized and secreted from alpha cells (α-cells) of the ________, which are located in the endocrine portion of the pancreas.
Endocrine glandIslets of LangerhansHypothalamusEndocrine system

Question 3: This enzyme, in turn, activates phosphorylase kinase, which, in turn, phosphorylates ________, converting into the active form called phosphorylase A.
Glycogen synthaseGlycogen debranching enzymeGlycogen phosphorylaseGlycogen branching enzyme

Question 4: Increased plasma ________ (to protect from hypoglycemia if an all-protein meal is consumed)
MetabolismAmino acid synthesisAmino acidL-DOPA

Question 5: Glucagon binds to the glucagon receptor, a ________ located in the plasma membrane.
Receptor (biochemistry)G protein-coupled receptorMembrane receptorOlfactory receptor

Question 6: Glucagon helps maintain the level of glucose in the ________ by binding to glucagon receptors on hepatocytes, causing the liver to release glucose - stored in the form of glycogen - through a process known as glycogenolysis.
Red blood cellBloodBlood plasmaPlatelet

Question 7: Its ________ in humans is: NH2-His-Ser-Gln-Gly-Thr-Phe-Thr-Ser-Asp-Tyr-Ser-Lys-Tyr-Leu-Asp-Ser- Arg-Arg-Ala-Gln-Asp-Phe-Val-Gln-Trp-Leu- Met-Asn-Thr-COOH.
Primary structureProtein biosynthesisAmino acidDisulfide bond

Question 8: Glucagon is an important ________ involved in carbohydrate metabolism.
HormoneEndocrine systemProgesteroneTestosterone

Question 9: Both of these mechanisms lead to glucose release by the liver, preventing the development of ________.
ICD-10 Chapter IV: Endocrine, nutritional and metabolic diseasesHypoglycemiaEpinephrineDiabetes mellitus

Question 10: The conformation change in the receptor activates ________, a heterotrimeric protein with α, β, and γ subunits.
Ras (protein)G proteinGTPasePlasma membrane Ca2+ ATPase

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