Urodilatin (a natriuretic peptide) inhibits sodium and water reabsorption from the
medullary part of collecting duct, thereby producing diuresis. It is not involved in the
actions described by the other options.
Question 3
pts
What is the direct action of atrial natriuretic hormone?
Sodium retention
Correct!
Sodium excretion
Water retention
Water excretion
Atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP) inhibit the secretion
of renin, inhibit angiotensin-induced secretion of aldosterone, vasodilate the afferent
and constrict the efferent glomerular arterioles, and inhibit sodium and water absorption
by kidney tubules. The other actions are not a result of the atrial natriuretic hormone.
Question 4
pts
Which statement best describes a Schilling test?
Correct!
Administration of radioactive cobalamin and the measurement of its excretion in the
urine to test for vitamin B deficiency
12
Measurement of antigen-antibody immune complexes in the blood to test for hemolytic
anemia
, Measurement of serum ferritin and total iron-binding capacity in the blood to test for iron
deficiency anemia
Administration of folate and measurement in 2 hours of its level in a blood sample to
test for folic acid deficiency anemia.
The Schilling test indirectly evaluates vitamin B12 absorption by administering radioactive
B12 and measuring excretion in the urine. This selection is the only option that accurately
describes a Schilling test.
Question 5
pts
Hemolytic disease of the newborn (HDN) can occur if the mother:
Is Rh-positive and the fetus is Rh-negative
Correct!
Is Rh-negative and the fetus is Rh-positive
Has type A blood and the fetus has type O
Has type AB blood and the fetus has type B
HDN can occur only if antigens on fetal erythrocytes differ from antigens on maternal
erythrocytes. Maternal-fetal incompatibility exists only if the mother and fetus differ in
ABO blood type or if the fetus is Rh-positive and the mother is Rh-negative. This
erythrocyte incompatibility does not exist in any of the other options.
Question 6
pts
Which T-lymphocyte phenotype is the key determinant of childhood asthma?
Cluster of differentiation (CD) 4 T-helper Th lymphocytes
1
Correct!
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller drsmith. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.49. You're not tied to anything after your purchase.
