Chapter 6: Lesson 3 Flashcards
Lipolysis
The breakdown and utilization of fat for energy.
Enzyme
A substance in the body that causes a specific reaction or change.
Glands
Organs that release substances into the bloodstream (such as hormones) or other surface of the body.
Hormone
Chemical messenger released from a gland that travels to cells to activate a specific function.
Target (receptor) cell
Cell that receives a message from a hormone or enzyme. Target cells exert an action after being stimulated or activated.
Hypothalamus
A gland located in the brain that communicates with the pituitary gland.
Pineal gland
A small gland in the brain that secretes the hormone melatonin, which helps regulate sleep cycles.
Pancreas
An organ with numerous functions, including the production of insulin, glucagon, and digestive juices.
Thyroid gland
An endocrine gland, located in the anterior neck, responsible for the secretion of many hormones, including thyroxin and calcitonin.
Pituitary gland
An endocrine gland that controls the secretion of many hormones, including growth hormone.
Adrenal gland
A gland, located just above the kidneys, responsible for the secretion of catecholamines and cortisol.
Reproductive glands
Glands, such as the ovaries or testes, that serve sex-specific functions.
Insulin
A hormone secreted by the pancreas that is responsible for glucose metabolism.
Glucagon
A hormone secreted by the pancreas that regulates blood glucose and functions opposite to insulin.
Substrates
Intermediate forms of nutrients used in metabolic reactions to create adenosine triphosphate.