Exam 18: Principles of Endocrinology: the Central Endocrine Glands

Only in males do the cells of Leydig secrete LH.

FSH and LH are collectively called ____________________ because they control secretion of sex hormones.

____________________ from the anterior pituitary stimulates cortisol secretion.

__________ is not a characteristic of oxytocin.

Peptide hormones are made from the breakdown of amino acids.

________ inhibiting ______ secretion represents a long-loop negative feedback mechanism.

Indicate which characteristics in the left column apply to the hormones below by writing the appropriate letters in the blanks. a.Steroids b.Catecholamines c.Peptides d.Thyroid hormone -Once synthesized, actively transported into preformed vesicles for storage

____________ are anterior pituitary cells that synthesize and secrete FSH and LH.

The major control for hypothalamic-induced release of vasopressin from the posterior pituitary is input from hypothalamic __________ (special type of receptors).

Indicate the solubility characteristics of each of the classes of hormones by writing the appropriate letter in the blank using the following answer code: a.Lipophilic b.Hydrophilic -Steroids

__________ does not act on its target cell by binding with a G-protein coupled receptor.

The main control normally determining the plasma concentration of a particular hormone is its rate of inactivation and excretion.

Only hormones that are not bound to plasma proteins are biologically active.

Hyposecretion of an endocrine gland may have a genetic basis.

Which class(es) of hormones is/are released by exocytosis upon appropriate stimulation?

Melatonin may be able to slow the aging process and also enhance the immune system.

__________ do(es) not use a second messenger system.

The posterior pituitary secretes ____________________ and ____________________.

This releasing hormone called ____________________ ultimately causes secretion of cortisol.

Which class of hormones triggers the synthesis of new intracellular proteins within the target cell?