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Related Concept Videos

Types of Hormones02:13

Types of Hormones

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Hormones can be classified into three main types based on their chemical structures: steroids, peptides, and amines. Their actions are mediated by the specific receptors they bind to on target cells.
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Types of Hormones01:21

Types of Hormones

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Hormones are classified into four main groups: steroids, eicosanoids, amino acid-based derivatives, and peptide hormones.
Steroids and eicosanoids fall under the category of lipid-soluble hormones. Steroids are derived from cholesterol and feature four interconnected carbon rings with variable side chains. Notable examples include estradiol from ovaries and testosterone from testes, exemplifying the critical roles of these lipid-soluble hormones in reproductive physiology. Eicosanoids, derived...
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Hormonal Regulation01:33

Hormonal Regulation

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The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
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Hormonal Regulation01:40

Hormonal Regulation

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Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.
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Plant Hormones01:56

Plant Hormones

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Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones are often produced in specific glands and circulated via the circulatory system. However, plants lack hormone-producing glands.
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Hormones of the Pituitary Gland01:27

Hormones of the Pituitary Gland

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The small, pea-sized pituitary gland is located at the base of the brain. It is crucial in regulating various bodily functions, from growth to reproduction. The gland is divided into the anterior lobe and the posterior lobe. The secretory cell clusters in the pars distalis of the anterior pituitary lobe are controlled by hypothalamic regulators and synthesize six primary hormones.
The most abundantly secreted hormone from the anterior lobe is the growth hormone, which controls overall growth by...
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Related Experiment Video

Updated: Jan 28, 2026

An Ex vivo Model to Study Hormone Action in the Human Breast
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An Ex vivo Model to Study Hormone Action in the Human Breast

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A New Year-Long Combination Hormonal Contraceptive.

Kala K Blakely

    Nursing for Women'S Health
    |March 6, 2019
    PubMed
    Summary

    Annovera, a new contraceptive, is the first multiuse vaginal system approved by the FDA. It prevents ovulation for up to 13 cycles annually and offers women greater control over their reproductive health.

    Area of Science:

    • Reproductive Health
    • Contraception
    • Endocrinology

    Background:

    • Several combination hormonal contraceptives are available.
    • Existing methods often require frequent replacement or healthcare provider intervention.
    • There is a need for long-acting, user-controlled contraceptive options.

    Purpose of the Study:

    • To introduce Annovera, a novel multiuse vaginal contraceptive system.
    • To highlight its unique features and potential benefits for women's reproductive health.

    Main Methods:

    • The U.S. Food and Drug Administration (FDA) approved Annovera.
    • Annovera is a combination contraceptive containing segesterone acetate and ethinyl estradiol.
    • It is designed for repeated use over 13 menstrual cycles.
    Keywords:
    Annoverabirth controlcombination hormonal contraceptiveethinyl estradiolsegesterone acetateunintended pregnancyvaginal ring

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    Related Experiment Videos

    Last Updated: Jan 28, 2026

    An Ex vivo Model to Study Hormone Action in the Human Breast
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    Main Results:

    • Annovera is the first single vaginal system for year-long, repeated use.
    • It effectively prevents ovulation for up to 13 menstrual cycles.
    • The system does not require placement by a healthcare provider.

    Conclusions:

    • Annovera offers women a novel, user-controlled contraceptive option.
    • Its room-temperature storage is advantageous for various climates.
    • This innovation provides extended contraception with enhanced convenience.