In the formation of blood cells, the megakaryocyte

ATI RN

ATI RN Test Bank

In the formation of blood cells, the megakaryocyte ultimately forms:

A. lymphocytes B. platelets C. monocytes D. both A and B

Correct Answer: B

Rationale: Megakaryocytes (B) fragment into platelets.

A person with no antigens on the red blood cell would have which blood type?

A. Type A B. Type B C. Type AB D. Type O

Correct Answer: D

Rationale: Type O (D) lacks A/B antigens.

Called the universal recipient; has both A and B antigens and no antibodies

A. Type A B. Type B C. Type AB D. Type O

Correct Answer: C

Rationale: Type AB (C) has A/B antigens, no antibodies, accepting all types.

Another name for red bone marrow

A. Yellow marrow B. Myeloid tissue C. Lymphoid tissue D. Spongy bone

Correct Answer: B

Rationale: Red bone marrow is myeloid tissue (B), site of hematopoiesis.

Vascular spasm, the first mechanism activated to decrease blood loss, is caused by

A. damage to smooth muscle B. substances released by activated platelets C. reflexes initiated by pain receptors D. all of the above

Correct Answer: D

Rationale: Vascular spasm (D) involves muscle damage (A), platelet factors (B), and pain reflexes (C).

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