The endocrine system uses hormones to coordinate body functions across organs and tissues. This lesson explains how hormonal signaling differs from neurotransmission and how the hypothalamus and pituitary help regulate endocrine activity.
The endocrine system is a network of glands that produces and releases chemical substances called hormones. Like neurotransmitters, hormones are chemical messengers. A hormone can affect a cell only when it binds to a matching receptor on or in that cell.
All flashcards
What is the endocrine system?
A network of glands that produces and releases hormones, which help regulate bodily functions.
What must be present for a hormone to affect a cell?
The cell must have a receptor that can bind to that hormone.
How does hormone signaling differ from neurotransmitter signaling?
Hormones travel through the bloodstream and can have widespread, slower, longer-lasting effects. Neurotransmitters are released close to target cells and typically have more localized effects.
Why is the pituitary called the master gland?
Some pituitary hormones regulate the activity of other endocrine glands. The pituitary nevertheless mostly carries out instructions from the hypothalamus.
How do the hypothalamus and pituitary relate to each other?
The hypothalamus, in the central nervous system, interacts closely with the pituitary to control and coordinate hormone activity.
Quiz questions
Which processes are regulated by thyroid hormones?Answer: Metabolism and appetite
How do insulin and glucagon affect blood glucose?Answer: Insulin lowers it, while glucagon raises it.
Which hormones released by the adrenal glands participate in the stress response?Answer: Epinephrine and norepinephrine
Which is a potential harm associated with anabolic steroid use?Answer: Mood changes and increased aggressive behavior
Which gland releases melatonin, helping regulate sleep-related biological rhythms?Answer: The pineal gland
Based on Psychology 2e by Rose M. Spielman, William J. Jenkins, Marilyn D. Lovett (OpenStax), licensed CC BY 4.0. Adapted into a summary, flashcards and quizzes.