Parathyroid secretion is triggered by
low blood calcium.
Negative feedback inhibits parathyroid hormone secretion because
target cell responses oppose the original stimulus.
A blood sample is found to have low levels of GHRH and excessive levels of GH and IGFs. Where would the pathology be located in this example?
The anterior pituitary
Why is elevated TSH sometimes associated with hypothyroidism?
There is a lack of feedback inhibition by thyroid hormone on the anterior pituitary.
Which of the following is not a typical way that hormones function?
Hormones control the size and shape of target cells.
A cell's or tissue's response to a hormone primarily depends on the
cell's receptors and the signal transduction pathway used by the cell
What is the implication of the fact that steroid hormones are lipophilic?
They bind to intracellular receptors.
Which of the following is NOT a method of hormone action?
control of electrical signaling pathways
The adrenal cortex produces a steroid hormone called ________ that controls Na+ and K+ homeostasis and another steroid hormone called ________ that controls blood glucose levels.
aldosterone, cortisol
The posterior pituitary gland secretes
ADH (Vasopressin).
The pituitary hormone that controls the release of glucocorticoids from the adrenal cortex is
ACTH.
The pituitary hormone that stimulates cell growth and metabolism in many tissues is
somatotropin.
lipophobic molecule that interacts with receptors on cell surface
peptide hormone
storage and release site for oxytocin
posterior pituitary
calcitonin is released from
thyroid glands
anterior pituitary releases
prolactin
adrenal cortex releases
aldosterone
The term for any hormone that controls the secretion of another hormone is a
trophic hormone.
The hormones of the anterior pituitary are controlled by trophic hormones from the
hypothalamus.
The term for two hormones that have additive effects is
synergists.
The term that describes the need for one hormone to be present for a second hormone to produce a full effect is called
permissive.
Synergism occurs when
hormones working together produce a larger effect than predicted.