- 01Hormones & endocrine signals · 2 min read
What Is the Difference Between a Hormone and a Peptide?
“Hormone” describes a signaling role. “Peptide” describes a molecular structure made from linked amino acids. A molecule can be both, but the terms are not interchangeable.
- 02Hormones & endocrine signals · 2 min read
What Is a Hormone Receptor?
A hormone receptor is a molecular structure, usually a protein, that recognizes a hormone and helps translate that interaction into a cellular response. The receptor is one reason a…
- 03Hormones & endocrine signals · 2 min read
How Does the Pituitary Gland Work?
The pituitary is a small gland at the base of the brain that helps coordinate several hormonal systems. It is often called a master gland, but it does not act alone. It receives signals…
- 04Hormones & endocrine signals · 2 min read
What Is Negative Feedback in Endocrinology?
Negative feedback is a regulatory process in which a system’s output reduces the signals that drive further output. It helps keep hormone activity within an appropriate range while allowing…
- 05Hormones & endocrine signals · 2 min read
What Are Pulsatile Hormone Signals?
Pulsatile hormone signals are releases that rise and fall in bursts rather than remaining constant. The timing of a signal can carry biological information, just as the spacing of words…
- 06Hormones & endocrine signals · 2 min read
What Is a Secretagogue?
A secretagogue is a substance that stimulates a cell or gland to release a product. The term describes an action, not a chemical family. A secretagogue may be a peptide or another kind of…
- 07Hormones & endocrine signals · 2 min read
What Is Receptor Selectivity?
Receptor selectivity describes how preferentially a molecule acts at one target compared with others under specified conditions. It is usually a matter of degree, not an absolute promise…
Reading journey
Why more signal is not the whole story.
Explore receptors, feedback and pulsatile signals before interpreting specific compounds.
