Terms in this set (230)
What are clinical The lower levels of thyroid hormone result in decreased
manifestations of energy metabolism, resulting in constipation, bradycardia,
hypothyroidism? a. Intolerance and lethargy, thus eliminating the remaining options.
to heat, tachycardia, and
weight loss b.
Oligomenorrhea, fatigue, and
warm skin c. Restlessness,
increased appetite, and
metrorrhagia d.
Constipation, decreased
heat rate, and lethargy
Negative feedback. Feedback systems provide precise
Thyroid-stimulating hormone
monitoring and control of the cellular environment.
(TSH) is released to stimulate
Negative feedback occurs because the changing
thyroid hormone (TH) and is
chemical, neural, or endocrine response to a stimulus
inhibited when plasma levels
negates the initiating change that triggered the release of
of TH are adequate. This is an
the hormone. Thyrotropin-releasing hormone (TRH) from the
example of: a.
hypothalamus stimulates TSH secretion from the anterior
Positive feedback b. Neural
pituitary. Secretion of TSH stimulates the synthesis and
regulation c. Negative
secretion of THs. Increasing levels of T4 and triiodothyronine
feedback d. Physiologic
(T3) then generate negative feedback on the pituitary and
regulation
hypothalamus to inhibit TRH and TSH synthesis.
Lipid-soluble hormone Inside the plasma membrane in the cytoplasm. Lipid-soluble
receptors are located: a. hormone receptors are located inside the plasma membrane
Inside the plasma membrane in and easily diffuse across the plasma membrane to bind to
the cytoplasm b. On the either cytosolic or nuclear receptors.
outer surface of the plasma
membrane c. Inside the
mitochondria d. On the inner
,surface of the plasma
membrane
The releasing hormones that Portal hypophyseal blood vessels. Releasing and
are made in the inhibitory hormones are synthesized in the hypothalamus
hypothalamus travel to the and are secreted into the portal blood vessels through which
anterior pituitary via the: a. they travel to the anterior pituitary hormones.
Vessels of the zona
fasciculata b. Hypophyseal
stalk c.
Infundibular stem d. Portal
hypophyseal blood vessels
, Which mineral is needed for Iodide. TSH, which is synthesized and stored in the anterior
thyroid- stimulating hormone pituitary, stimulates secretion of TH by activating
(TSH) to stimulate the secretion intracellular processes, including the uptake of iodine
of thyroid hormone (TH)? a. necessary for the synthesis of TH.
Iron
b. Iodide c. Zinc d. Copper
What effect does Decreases serum calcium. Hyperphosphatemia leads to
hyperphosphatemia have on hypocalcemia. Remember that phos and calcium are
other electrolytes? a. inversely related.
Increases serum calcium b.
Decreases serum magnesium
c. Decreases serum calcium
d. Increases serum
magnesium
Insulin transports which Potassium. Insulin facilitates the intracellular transport of
electrolyte in the cell? a. potassium, phosphate, and magnesium.
Potassium b. Sodium c. Calcium
d. Phosphorus
Which second messenger is Cyclic adenosine monophosphate (cAMP). Second-
stimulated by epinephrine messenger molecules are the initial link between the first
binding to a β-adrenergic signal (hormone) and the inside of the cell. For example, the
receptor? a. Calcium b. binding of epinephrine to a β adrenergic-receptor subtype
Inositol triphosphate (IP3) c. activates (through a stimulatory G protein) the enzyme,
Diacylglycerol (DAG) adenylyl cyclase. Adenylyl cyclase catalyzes the conversion
d. Cyclic adenosine of adenosine triphosphate (ATP) to the second messenger, 3',
monophosphate (cAMP) and 5'- cAMP.
Regulation of the release of Neural. The release of hormones occurs either in
catecholamines from the response to an alteration in the cellular environment or in
adrenal medulla is an example the process of maintaining a regulated level of certain
of which type of regulation? hormones or certain substances. Several different
a. Negative feedback b. Neural c. mechanisms, one of which is neural control (e.g., stress-
Positive induced release of catecholamines from the adrenal
feedback d. Physiologic medulla),
regulate the release of hormones.
Which hormone does the Angiotensin II. Ca++ is considered an important second