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Mechanism of Action of Peptide Hormones

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Questions and Answers

What is the function of tropic hormones?

Target endocrine glands (correct)

Directly regulate body functions

Inhibit the release of other hormones

Stimulate muscle growth

Which part of Rathke's pouch forms the Anterior Lobe of the pituitary gland?

Pars tuberalis

Pars distalis (correct)

Pars intermedia

Residual cleft

What is the function of dopamine on Prolactin?

Triggers its synthesis

Stimulates its release

Inhibits its release (correct)

Converts it into another hormone

Which hormone is released by the pituitary gland to stimulate thyroid function?

Thyroid-stimulating hormone Signup and view all the answers

How are pituitary hormones regulated?

By the hypothalamus Signup and view all the answers

Where is the pars intermedia located in relation to Rathke's pouch?

In the middle of Rathke's pouch Signup and view all the answers

What is the function of the paraventricular and supraoptic nuclei in the pituitary gland?

Release oxytocin and vasopressin Signup and view all the answers

What type of receptors do water-soluble hormones attach to?

G-protein-coupled receptors Signup and view all the answers

How are hormones from the hypothalamus transported to the posterior pituitary?

Along the nerve cell's axons Signup and view all the answers

Which hormone is released by the intermediate lobe of the pituitary gland?

Melanocyte-stimulating hormone (MSH) Signup and view all the answers

What is the main mechanism by which G-protein-coupled receptors transmit signals into the cell?

Conformational change in the receptor Signup and view all the answers

How do high levels of adrenocorticotropic hormone (ACTH) impact melanocyte-stimulating hormone (MSH) levels in Cushing's syndrome?

Increase MSH levels Signup and view all the answers

Which part of the brain links the nervous system to the endocrine system?

Hypothalamus Signup and view all the answers

What is the main function of luteinizing hormone and follicle stimulating hormone releasing factor from the tuberal nuclei?

Stimulate pars distalis secretion Signup and view all the answers

Which of the following best describes the relationship between the hypothalamus and pituitary gland?

Most hormones generated in the hypothalamus are distributed to the pituitary gland. Signup and view all the answers

Where does most of the pituitary gland's regulation come from?

Directly from the hypothalamus Signup and view all the answers

What is the mechanism of hormone release from the hypothalamic neurons to the posterior pituitary gland?

Neuroendocrine signaling Signup and view all the answers

What is the composition of the posterior pituitary (neurohypophysis)?

Both glandular and neural tissue Signup and view all the answers