The Medical College - Page 55
B.
protein 1 was affected more by the
increasing concentration of seawater
than
protein 2.
C.
protein 2 was affected more by the
increasing concentration of seawater
than
protein 1.
D.
the data could not be analyzed.
An investigator had been studying the
interrelation-
ship (cooperation) of various cell types in
tissue culture
in the immune response to an antigen. The
experiments
conducted attempted to determine if spleen and
mast
cells were required for the production of
antibody
against a pollen. Various donor cells (spleen
and mast
cells) were injected into recipient rabbits
whose
immune system had been rendered nonresponsive
by
whole body X-irradiation. Antibody levels were
deter-
mined in the serum of the
recipients.
Experimental Groups
Antibody Level
A. Spleen and pollen
0
B. Spleen
0
C. Mast cells and pollen
0
D. Mast cells
0
E. Spleen and mast cells and
pollen
++
F. Bone marrow and pollen
++
G. Thymocytes and pollen
++
208.
The following statements are related to the
infor-
mation presented above. Select the statement
not
supported by the information
given.
A.
In the system under investigation,
spleen
and mast cells together are required
for
antibody production.
B.
Spleen cells are probably found in the
thy-
mus.
C.
Spleen cells or mast cells are essential
to
the antibody production against
pollen.
D.
In the intact animal, the mast cells
would
probably be important as a source of
anti-
body.
Four groups of rats were maintained under
identical
conditions. Three of the groups received drugs
in their
drinking water over a period of five weeks. The
day
before autopsy each rat received one microcurie
of
131I.
At autopsy the thyroid glands from each group
were
pooled and weighed. Iodinated intermediates
were iso-
lated and their radioactivity determined.
Remember
iodide is trapped, oxidized, proteinated, and
stored as
part of the thyroid hormone.
131I
CONTENT
(counts/min./100 mg Thyroid
Tissue)
Av.
Throid Wt.
Iodine
Monoiodo- Trilodo-
mg/100 g
Groups
Drug
Ion
tryosine
thyronine Thyroxine body wt.
1
None
6,120
10,140
7,520
35,990
14
2
A
55
46
13
62
76
3
B
40,976
10
9
14
88
4
C
1,592
2,025
1,970
8,985
4
209.
Which group was treated with thryoxine,
an
inhibitor of the production of thyroid
stimulating
hormone by the pituitary gland?
A.
Group 2
C.
Group 4
B.
Group 3
D.
none of the above
After growing turkey red wheat for two years on
a
dry land farm, John Calendar had accumulated
enough
capital to move his family to a more fertile
area. The
first crops he planted on the new 1,000-acre
farm did
well. The following bar graphs indicate his
production
of wheat and corn over the last five years.
Bushels are
plotted on the abscissa, and the numbers of
acres
planted in both crops are shown in
parentheses.
210.
What was the average yearly proportion
of
wheat production to corn
production?
A.
3/2
C.
10/9
B.
7/8
D.
5/7
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