Which of the following is the most abundant type of white blood cell (WBC) in human blood?
A. Eosinophils
B. Lymphocytes
C. Monocytes
D. Neutrophils
Answer: Option D
Solution (By JKExamLibrary)
Neutrophils are the most abundant white blood cells, constituting about 60-65% of the total WBC count. They are polymorphonuclear and are highly phagocytic, acting as the first line of defense against bacterial infections. Lymphocytes are the second most abundant (20-25%), while monocytes and eosinophils are present in smaller percentages.
Explanation:
Dengue is transmitted by Aedes aegypti, which also spreads chikungunya, Zika, and yellow fever. Anopheles transmits malaria, Culex filariasis, tsetse sleeping sickness.
Explanation:
The left ventricle pumps blood into the aorta and to the systemic circulation. Its wall is the thickest because it must generate high pressure.
Explanation:
Genotype is the set of alleles an individual possesses for a particular gene or trait (e.g., TT, Tt, tt). Phenotype is the observable characteristic. Karyotype is the chromosome complement.
No comments yet. Be the first to start the discussion!