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Hypothalamus, Anterior Pituitary and Adrenal Glands

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Hypothalamus, Anterior Pituitary and Adrenal Glands

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Questions and Answers

What is the main role of the hypothalamus in the endocrine system?

Regulating circadian rhythms

Enforcing homeostatic mechanisms on target glands (correct)

Producing hormones for the adrenal glands

Coordinating behavioral rhythms

How does the hypothalamus respond to external and internal signals?

By regulating the release of anterior pituitary hormones

By producing factors that act on the pituitary

By releasing a variety of hormones (correct)

By coordinating circadian rhythms

What is the main stimulatory factor involved in the control of the pituitary–adrenal axis?

Homeostatic mechanisms

Circadian rhythm

CRH (Corticotrophin-releasing hormone) (correct)

Behavioral rhythms

How are the hormones produced by target glands controlled by the anterior pituitary connected to the hypothalamus?

Through the release of CRH Signup and view all the answers

What is the function of the hypothalamo‐hypophyseal portal blood vessels in relation to the pituitary gland?

To regulate the release of anterior pituitary hormones Signup and view all the answers

Which hormone stimulates the release of the gonadotrophins LH and FSH from the gonadotroph?

Corticotropin-releasing hormone (CRH) Signup and view all the answers

What hormone directly inhibits the release of thyrotrophin-releasing hormone (TRH)?

Thyroid hormones Signup and view all the answers

From which organ is the peptide hormone ghrelin predominantly released?

Stomach Signup and view all the answers

Which hormone is a multipurpose hormone exerting more than 300 biologic activities including reproductive, sexual, metabolic, and immune functions?

Prolactin (PRL) Signup and view all the answers

What hormone is subject to negative feedback control by cortisol released from the adrenal cortex?

Gonadotrophin-releasing hormone (GnRH) Signup and view all the answers