Question :
Hemolytic disease of the newborn (HDN) can occur if the
mother:
Student
Answer:
Is Rh-positive and the fetus is Rh-negative
Is
... [Show More] 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
Instructor
Explanation:
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.
Points Received: 2 of 2
Comments:
Question 2. Question :
Examination of the throat in a child demonstrating signs and
symptoms of acute epiglottitis may contribute to which lifethreatening complication?
Student
Answer:
Retropharyngeal abscess
Laryngospasms
Rupturing of the tonsils
Gagging induced aspiration
Instructor
Explanation:
Examination of the throat may trigger laryngospasm and cause respiratory
collapse. Death may occur in a few hours. This selection is the only option
that accurately identifies the life-threatening complication that can result from
-589875941 MultipleChoice 68 True
0 -589875941 MultipleChoice 68an examination of the throat of a child who demonstrates the signs and
symptoms of acute epiglottitis.
Points Received: 2 of 2
Comments:
Question 3. Question :
If the sinoatrial (SA) node fails, then at what rate (depolarizations
per minute) can the atrioventricular (AV) node depolarize?
Student
Answer:
60 to 70
40 to 60
30 to 40
10 to 20
Instructor
Explanation:
If the SA node is damaged, then the AV node will become the heart’s
pacemaker at a rate of approximately 40 to 60 spontaneous depolarizations per
minute.
Points Received: 2 of 2
Comments:
Question 4. Question :
What is the ratio of coronary capillaries to cardiac muscle cells?
Student
Answer:
1:1 (one capillary per one muscle cell)
1:2 (one capillary per two muscle cells)
1:4 (one capillary per four muscle cells)
-589875940 MultipleChoice 87 True
0 -589875940 MultipleChoice 87
-589875939 MultipleChoice 75 True
0 -589875939 MultipleChoice 751:10 (one capillary per ten muscle cells)
Instructor
Explanation:
The heart has an extensive capillary network, with approximately 3300
capillaries per square millimeter (ca/mm2) or approximately one capillary
per one muscle cell (muscle fiber).
Points Received: 2 of 2
Comments:
Question 5. Question :
Which cytokines initiate the production of corticotropin-releasing
hormone (CRH)?
Student
Answer:
IL–1 and IL-6
IL-2 and TNF-
IFN and IL-12
TNF-ß and IL-4
Instructor
Explanation:
Although a number of stress factors initiate the production of CRH, of the
options available, only high levels of IL-1 and IL-6 initiate such a response.
Points Received: 2 of 2
Comments:
Question 6. Question :
What process allows the kidney to respond to an increase in
workload?
Student
Answer:
Glomerular filtration
Secretion of 1,25-dihydroxyvitamin D3
-589875938 MultipleChoice 73 True
0 -589875938 MultipleChoice 73
-589875937 MultipleChoice 21 True
0 -589875937 MultipleChoice 21Increased heart rate
Compensatory hypertrophy
Instructor
Explanation:
Compensatory hypertrophy allows the kidney to respond to an increase in
workload throughout life. The remaining options are not relevant to
accommodating an increased workload.
Points Received: 2 of 2
Comments:
Question 7. Question :
Which type of antibody is involved in type I hypersensitivity
reaction?
Student
Answer:
IgA
IgE
IgG
IgM
Instructor
Explanation:
Type I reactions are only mediated by antigen-specific IgE and the products
of tissue mast cells (see Figure 9-1).
Points Received: 2 of 2
Comments:
Question 8. Question :
Causes of hyperkalemia include:
Student
Answer:
Hyperparathyroidism and malnutrition
-589875936 MultipleChoice 108 True
0 -589875936 MultipleChoice 108
-589875935 MultipleChoice 9 True
0 -589875935 MultipleChoice 9Vomiting and diarrhea
Renal failure and Addison disease
Hyperaldosteronism and Cushing disease
Instructor
Explanation:
Hyperkalemia should be investigated when a history of renal disease,
massive trauma, insulin deficiency, Addison disease, use of potassium salt
substitutes, or metabolic acidosis exists. The other options are not known to
be causes of hyperkalemia.
Points Received: 2 of 2
Comments:
Question 9. Question :
What is the first stage in the infectious process?
Student
Answer:
Invasion
Colonization
Spread
Multiplication
Instructor
Explanation:
From the perspective of the microorganisms that cause disease, the infectious
process undergoes four separate stages of progression: (1) colonization, (2)
invasion, (3) multiplication, and (4) spread.
Points Received: 2 of 2
Comments:
Question 10
.
Question :
Which statement is true concerning the IgM?
-589875934 MultipleChoice 36 True
0 -589875934 MultipleChoice 36
-589875933 MultipleChoice 7 True
0 -589875933 MultipleChoice 7Student Answer: IgM is the first antibody produced during the initial response
to an antigen.
IgM mediates many common allergic responses.
IgM is the most abundant class of immunoglobulins.
IgM is capable of crossing the human placenta.
Instructor
Explanation:
Typically, IgM is produced first (primary immune response), followed
by IgG against the same antigen. The other options are not true
statements regarding IgM.
Points Received: 2 of 2
Comments:
Question 11
.
Question :
An infant has a loud, harsh, holosystolic murmur and systolic
thrill that can be detected at the left lower sternal border that
radiates to the neck. These clinical findings are consistent with
which congenital heart defect?
Student
Answer:
Atrial septal defect (ASD)
Ventricular septal defect (VSD)
Patent ductus arteriosus (PDA)
Atrioventricular canal (AVC) defect
Instructor
Explanation:
On physical examination, a loud, harsh, holosystolic murmur and systolic
thrill can be detected at the left lower sternal border. The intensity of the
murmur reflects the pressure gradient across the VSD. An apical diastolic
rumble may be present with a moderate-to-large defect, reflecting increased
flow across the mitral valve. The presentations of the other congenital heart
defects are not consistent with the described symptoms.
Points Received: 2 of 2
-589875932 MultipleChoice 6 True
0 -589875932 MultipleChoice 6Comments:
Question 12
.
Question :
What is the chief predisposing factor for respiratory distress
syndrome (RDS) of the newborn?
Student
Answer:
Low birth weight
Alcohol consumption during pregnancy
Premature birth
Smoking during pregnancy
Instructor
Explanation:
RDS of the newborn, also known as hyaline membrane disease (HMD), is a
major cause of morbidity and mortality in premature newborns. None of the
other options are considered the chief predisposing factors for RDS.
Points Received: 2 of 2
Comments:
Question 13
.
Question :
Which cardiac chamber has the thinnest wall and why?
Student Answer: The right and left atria; they are low-pressure chambers that
serve as storage units and conduits for blood.
The right and left atria; they are not directly involved in the
preload, contractility, or afterload of the heart.
The left ventricle; the mean pressure of blood coming into
this ventricle is from the lung, which has a low pressure.
The right ventricle; it pumps blood into the pulmonary
-589875931 MultipleChoice 39 True
0 -589875931 MultipleChoice 39
-589875930 MultipleChoice 81 True
0 -589875930 MultipleChoice 81capillaries, which have a lower pressure compared with the
systemic circulation.
Instructor
Explanation:
The two atria have the thinnest walls because they are low-pressure
chambers that serve as storage units and conduits for blood that is
emptied into the ventricles. This selection is the only option that
correctly identifies which heart chambers have the thinnest walls and
why that helps cardiac function.
Points Received: 2 of 2
Comments:
Question 14
.
Question :
What is the direct action of atrial natriuretic hormone?
Student
Answer:
Sodium retention
Sodium excretion
Water retention
Water excretion
Instructor
Explanation:
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.
Points Received: 2 of 2
Comments:
Question 15
.
Question :
What is the primary site for uncomplicated local gonococci
infections in men?
-589875929 MultipleChoice 71 True
0 -589875929 MultipleChoice 71
-589875928 MultipleChoice 102 True
0 -589875928 MultipleChoice 102Student
Answer:
Epididymis
Lymph nodes
Urethra
Prostate
Instructor
Explanation:
Uncomplicated local infections are observed primarily as urethral infections
in men.
Points Received: 2 of 2
Comments:
Question 16
.
Question :
Which statement concerning benign tumors is true?
Student
Answer:
The resulting pain is severe.
Benign tumors are not encapsulated.
Benign tumors are fast growing.
The cells are well-differentiated.
Instructor
Explanation:
A benign tumor is well-differentiated with its tissue appearing similar to the
tissue from which it arose. The other options are characteristic of a
malignant tumor.
Points Received: 2 of 2
Comments:
Question 17
.
Question :
Which of the following is classified as a megaloblastic anemia?
-589875927 MultipleChoice 48 True
0 -589875927 MultipleChoice 48
-589875926 MultipleChoice 30 True
0 -589875926 MultipleChoice 30Student
Answer:
Iron deficiency
Pernicious
Sideroblastic
Hemolytic
Instructor
Explanation:
Pernicious anemia is the most common type of megaloblastic anemia. The
remaining options are not classified as megaloblastic anemias.
Points Received: 2 of 2
Comments:
Question 18
.
Question :
Apoptosis is a(an):
Student
Answer:
Normal mechanism for cells to self-destruct when growth is
excessive
Antigrowth signal activated by the tumor-suppressor gene Rb
Mutation of cell growth stimulated by the TP53 gene
Transformation of cells from dysplasia to anaplasia
Instructor
Explanation:
Normal cells have a mechanism that causes them to self-destruct when
growth is excessive and cell cycle checkpoints have been ignored. Diverse
stimuli, including normal development and excessive growth, trigger this
self-destruct mechanism, called apoptosis. The remaining options do not
describe apoptosis.
Points Received: 2 of 2
Comments:
-589875925 MultipleChoice 61 True
0 -589875925 MultipleChoice 61
-589875924 MultipleChoice 24 True
0 -589875924 MultipleChoice 24Question 19
.
Question :
What is the functional unit of the kidney called? [Show Less]