Which of the following precursor cells eventually give rise to the platelets?
Megakaryoblast
Proerythroblast
T lymphoblast
Monoblast
The Correct Answer is A
a) Megakaryoblast: The megakaryoblast is the precursor cell in the bone marrow that eventually becomes a megakaryocyte, which fragments to form platelets (thrombocytes).
b) Proerythroblast: This cell gives rise to red blood cells (erythrocytes), not platelets.
c) T lymphoblast: This is a precursor to T lymphocytes, part of the adaptive immune system.
d) Monoblast: This cell gives rise to monocytes, which become macrophages in tissues.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
a) They cross the plasma membrane.
Amino acid-based hormones are water-soluble and cannot easily cross the lipid bilayer of the plasma membrane.
b) They are lipid soluble.
Unlike steroid hormones, amino acid-based hormones are not lipid-soluble; they are hydrophilic.
c) They are synthesized from cholesterol.
Steroid hormones are synthesized from cholesterol, not amino acid-based hormones.
d) They require a receptor in the plasma membrane.
Due to their inability to cross the plasma membrane, amino acid-based hormones bind to cell surface receptors to trigger intracellular responses via second messengers.
Correct Answer is C
Explanation
a) B negative: If the patient had B negative blood: There would be agglutination with Anti-B,No agglutination with Anti-A or Anti-D.
b) AB positive: AB positive means agglutination with: Anti-A, Anti-B, and Anti-D.
c) A positive: Agglutination with Anti-A means the red cells have A antigens. No agglutination with Anti-B means B antigens are absent. Agglutination with Anti-D indicates the Rh factor is present, making the blood type Rh positive.
d) O negative: O negative blood has no A, B, or Rh antigens, so there would be: No agglutination with Anti-A, No agglutination with Anti-B, and No agglutination with Anti-D.
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