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Penn Foster A&P II Proctor Exam with Questions and Answers, Exams of Health sciences
Penn Foster A&P II Proctor Exam with Questions and Answers Describe the structure and function of each mature blood cell ANSWER RBC: -lacks a nucleus, mitochondria, and ribosomes -contains water, hemoglobin, and other structural elements -biconcave disk -transport oxygen to tissues -transport carbon dioxide to lungs -maintain cell shape and deformability WBC: -larger than RBC 5 types: -granulocytes basophils, neutrophils, eosinophils -agranulocytes lymphocytes and monocytes -provide defense for body against foreign invaders -phagocytosis -immunity Describe the structure of a hemoglobin molecule ANSWER -heme is the pigmented portion of hemoglobin -each heme unit contains an iron atom to which one O2 molecule can attach (can carry 4 O2 molecules) -hemoglobin attached to oxygen: oxyhemoglobin
Typology: Exams
2023/2024
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