#5: Endocrine System & Regulating Blood Sugar Flashcards
Endocrine System
a system of glands that regulates bodily functions via hormones secreted into the bloodstream
slower, longer-acting responses
includes the hypothalamus, pituitary gland, thyroid gland, parathyroid glands, adrenal glands, pancreas, and gonads (ovaries and testes)
Hormones
chemical regulators that are made in one part of the body but affect other part(s) of the body
Controls growth, development, reproduction, behaviour, energy metabolism, and water balance
Usually travel in the bloodstream
Maintaining Blood Sugar
pancreas and adrenal glands play a role in maintaining the [sugar] in the blood
Pancreas
in addition to producing digestive enzymes, the pancreas also produces hormones
hormones produced in specialized cells in the pancreas called the islets of Langerhans (two types: alpha and beta)
Alpha cells
produce glucagon
Beta cells
produce insulin
Glucagon
released by alpha cells when [sugar] in the blood is low
promotes the conversion of glycogen into glucose
Insulin
released by beta cells when [sugar] in the blood is high
promotes the intake of glucose by cells and the conversion of glucose into glycogen
Adrenal Glands
produce a number of hormones including epinephrine, norepinephrine, and glucocorticoids
Epinephrine and Norepinephrine
increase the [sugar] in the blood by promoting the breakdown of glycogen
Glucocorticoids
increase the blood [sugar] by increasing the level of amino acids in the blood
liver can convert these excess amino acids into glucose