Hormones Flashcard
Hormones
Chemical messengers that regulate various physiological processes in the body.
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Hormones
Chemical messengers that regulate various physiological processes in the body.
Chemical Messengers
Substances that transmit signals between cells and organs, often traveling through the bloodstream.
Peptide Hormones
Water-soluble hormones that cannot cross cell membranes and bind to surface receptors.
Steroid Hormones
Lipid-soluble hormones that can easily cross cell membranes and bind to intracellular receptors.
Insulin
A hormone produced by the pancreas that lowers blood sugar levels.
Glucagon
A hormone that raises blood sugar levels by promoting glycogen breakdown in the liver.
Cortisol
Known as the "stress hormone," it helps regulate metabolism and the body's response to stress.
Serotonin
A neurotransmitter that contributes to feelings of well-being and happiness; also a hormone.
Dopamine
A neurotransmitter and hormone involved in mood regulation, motivation, and reward.
Melatonin
A hormone produced by the pineal gland that regulates sleep-wake cycles.
Growth Hormone (GH)
A hormone that stimulates growth, cell reproduction, and regeneration in humans and animals.
Oxytocin
Often referred to as the "love hormone," it plays a key role in bonding and social interactions.
Thyroid Hormones
Hormones produced by the thyroid gland that regulate metabolism, energy levels, and growth.
Estrogen
A primary female sex hormone involved in the regulation of the menstrual cycle and reproductive system.
Progesterone
A hormone that prepares the uterus for pregnancy and regulates the menstrual cycle.
Testosterone
The primary male sex hormone responsible for the development of male reproductive tissues and secondary sexual characteristics.
Ghrelin
Known as the "hunger hormone," it stimulates appetite and food intake.
Leptin
A hormone that signals satiety and helps regulate energy balance by inhibiting hunger.
Adrenaline (Epinephrine)
A hormone released during stress that prepares the body for 'fight or flight' responses.
Feedback Mechanism
A process where the output of a system regulates its own production; crucial for hormonal balance.
Homeostasis
The body's ability to maintain stable internal conditions despite external changes.
Hormonal Imbalance
A condition that occurs when hormone levels are too high or too low, leading to health issues.
Endocrine Glands
Glands that secrete hormones directly into the bloodstream, such as the pituitary, thyroid, and adrenal glands.
Hypothalamus
A brain region that regulates hormonal activity and the body's homeostasis.
Pituitary Gland
Often referred to as the "master gland," it controls various endocrine functions in the body.
Pineal Gland
A small gland that produces melatonin, regulating sleep patterns.
Thyroid Gland
A gland that produces thyroid hormones, regulating metabolism and energy levels.
Adrenal Glands
Glands located above the kidneys that produce hormones such as cortisol and adrenaline.
Receptor Specificity
The ability of a hormone to bind only to its specific receptor on target cells.
Cell-Surface Receptors
Receptors located on the surface of cells that bind to water-soluble hormones.
Intracellular Receptors
Receptors located inside the cell that bind to lipid-soluble hormones.
Transcription Factors
Molecules that help regulate gene expression in response to hormonal signaling.
Second Messengers
Molecules that relay signals received by cell-surface receptors to target molecules inside the cell.
Up-Regulation
The process by which cells increase the number of hormone receptors in response to low hormone levels.
Down-Regulation
The process by which cells decrease the number of hormone receptors in response to high hormone levels.
Circadian Rhythm
The physical, mental, and behavioral changes that follow a 24-hour cycle, largely influenced by hormones.
Hormonal Signaling
The process through which hormones communicate with target cells to trigger specific responses.
Hormones and Mood
Hormones like serotonin and cortisol can significantly affect mood and emotional well-being.
Hormones and Metabolism
Hormones regulate metabolic processes, influencing energy production and usage in the body.
Endocrine Disorders
Conditions that result from hormonal imbalances, such as diabetes and hypothyroidism.
Hormones and Growth
Hormones like growth hormone and sex hormones play key roles in physical development and maturation.
Hormones and Reproduction
Hormones are essential for regulating reproductive processes in both males and females.
Environmental Influences
Factors such as stress, diet, and sleep can impact hormone levels and overall endocrine function.
Aging and Hormones
Hormone levels change with age, affecting growth, metabolism, and reproductive health.
Hormones and Immunity
Certain hormones, like cortisol, can suppress the immune response during prolonged stress.