Concept explainers
Introduction:
Blood is composed of 45 % of blood cells and the remaining 55 % is the plasma. There are three types of blood cells; Red blood cells (Erythrocytes), white blood cells (Leukocytes) and platelets (Thrombocytes).
Answer to Problem 1PL
Correct answer:
The correct answer is option (c) platelets.
Explanation of Solution
Explanation/justification for the correct answer:
Option (c) platelets. Platelets have no cell nucleus and they are fragments of cytoplasm. Major function of platelets is to react bleeding by clumping and initiating a blood clot, stopping further bleeding. Therefore. Option (c) is the correct answer.
Explanation for incorrect answer:
Option (a) erythrocytes. Erythrocytes are red blood cells. Erythrocytes also does not have a nucleus and contain hemoglobin which gives it a red color. The main function of red blood cells is to transport oxygen and carbon dioxide to and from the tissues. So, this option is incorrect.
Option (b) leukocytes. Leukocytes are also called white blood cells because they are colorless cells. The main function of white blood cells is to protect the body from foreign materials and diseases. So, this option is incorrect.
Option (d) plasma. Plasma is the liquid in which the blood cells and proteins are suspended. The main purpose of blood plasma is to transport nutrients, hormones and enzymes all over the body. So, this option is incorrect.
Platelets have significant functions mainly during bleeding. Hence, the correct answer is option (c) platelets.
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Chapter 41 Solutions
Laboratory Manual For Human Anatomy & Physiology
- Which of the following is not found in the blood? A. white blood cells B. red blood cells C. blue blood cells D. platelets.arrow_forwardWhich of the following are granulocytes? a. megakaryocyte b. leukocyte O . lymphocyte O d.erythrocytearrow_forwardWhich of the following blood components protects the individual from a variety of infectious agents such as bacteria and viruses? a. white blood cells b. platelets c. albumin d. red blood cellsarrow_forward
- An increase in the number of which of the following suggests a bacterial infection? A. Lymphocytes B. Neutrophils C. Monocytes D. Eosinophilsarrow_forwardfunctional injury to endothelial cells would most likely result in which of the following? a. hemorrhage per rhexis b. thrombosis c. hematoma d. hydrothoraxarrow_forwardFor a person whose hematocrit is 45%, a. plasma volume would be 55% of total blood volume b. plasma volume would be 45% of total blood volume c. red blood cell volume would be 55% of total blood volume d. white blood cell volume would be 45% of total blood volume All of the following characteristics of platelets are true EXCEPT a. Exhibit many vesicles b. Have nucleus c. Platelets are fragments of megakaryocytes d. Smallest size compared to other blood cellular components of 2- 4 μm If someone has no megakaryocytes, he/she will a. not be able to phagocytize bacteria b. have a reduced ability to prevent blood loss c. not be able to make red blood cells d. not be able to make white blood cellsarrow_forward
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