check my answers? who's correct me or my friend or is it a different answer?

check my answers? who's correct me or my friend or is it a different answer?Please check my answers, I have 2 different answers and I'm not sure which is the correct one?
I was comparing answers with a friend and out of 50 questions, we had 6 of them that were different from eachothers answers. Even if you don't know all, can you please help me with the ones that you do know?

Which white blood cells are phagocytes?
a) monocytes
b) T lymphocytes
c) B lymphocytes
d) all of the above

I put A, but my friend put D

2. In order for thrombin to be formed:
a) fibrinogen must be present
b) sodium must be present
c) potassium must be present
d) calcium must be present

I put D for this one, but my friend put A

3. Vitamin K stimulates the liver to increase productin of
a) prothrombin activator
b) fibrinogen
c) prothrombin
d) thrombin

I put C, but my friend put A

4. The blood type with no antigens on the blood cell and both anti-A and anti-B antibodies in the plasma is:
a) type AB
b) type O
c) type A
d) type B

I put B, but my friend put A

5. A patient with thicker-than-normal buffy coat may have:
a) an infection
b) leukemia
c) leukopenia
d) both A and B above

I put D, but my friend put B

6. A patient with a thiner-than-normal buffy coat may have:
a) an infectin
b) leukemia
c) leukopenia
d) both A and B above

I put C, but my friend put D

Answer by I could care less
1) monocytes

Monocytes differentiate into macrophages, which are capable of phagocytizing bacteria, dead cells, and other cellular debris in tissues. Neutrophils are also phagocytic. Lymphocytes do not carry out phagocytosis. B-Lymphocytes differentiate into plasma cells. Plasma cells, in turn, synthesize and secrete antibodies. T-Lymphocytes elicit the cellular immune response by attaching to foreign, antigen-bearing cells, such as bacterial cells. They also secrete polypeptides called cytokines, which enhance certain cellular responses to antigens. T-Lymphocytes may also secrete toxins that kill their antigen-bearing cells.

2) calcium must be present

In the presence of calcium ions, prothrombin activator converts prothrombin (factor II) into thrombin (factor IIa).

3) prothrombin

4) type O

An individual with type O blood lacks both A and B antigens on the surface of their red blood cells. As a result, the individual will produce both anti-A and anti-B antibodies. Choice (A) is not correct because an individual with type AB blood contains BOTH A and B antigens on the surface of their red blood cells. Such an individual produces NEITHER anti-A nor anti-B antibodies.

5) both A and B above

When blood is centrifuged, it is separated into three layers. The bottom layer contains the red blood cells, the middle layer is referred to as the "buffy coat" and contains white blood cells (leukocytes) and platelets. The top portion contains the liquid component of blood, or plasma. A thicker-than-normal buffy coat indicates that an individual has an elevated number of white blood cells (leukocytosis). This can be the result of acute bacterial infections, inflammation, or leukemia.

6) leukopenia

A thinner-than-normal buffy coat indicates that the patient has a low white blood cell count. This condition is referred to as leukopenia. Leukopenia is characterized as having a total white blood cell count below 5,000 per cubic millimeter of blood.

So basically I agree with all of your answers. I hope this helps...

Know better? Leave your own answer in the comments! Information about multiple myeloma and other plasma cell neoplasms.

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