Multiple Choice
Which statement best differentiates gray matter from white matter in the human nervous system?
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1. Introduction to Biology
Introduction to Biology
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Which of the following is NOT a constituent part of human blood?
A
Plasma
B
Neurons
C
Platelets (thrombocytes)
D
Red blood cells (erythrocytes)
Verified step by step guidance1
Step 1: Begin by understanding the components of human blood. Human blood is composed of plasma, red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes). Plasma is the liquid portion that carries nutrients, hormones, and waste products.
Step 2: Review the function of each component. Red blood cells transport oxygen and carbon dioxide, platelets are involved in blood clotting, and plasma serves as the medium for transporting substances.
Step 3: Identify the term 'neurons' in the list. Neurons are specialized cells of the nervous system responsible for transmitting electrical signals, and they are not part of the circulatory system or blood.
Step 4: Compare the listed options to the known components of blood. Plasma, platelets, and red blood cells are all integral parts of blood, while neurons are not.
Step 5: Conclude that the correct answer is 'neurons,' as they are not a constituent part of human blood.
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