LAB MANUAL:MCKINLEY'S ANATOMY & PHYSIOL
LAB MANUAL:MCKINLEY'S ANATOMY & PHYSIOL
2nd Edition
ISBN: 9781260484991
Author: McKinley
Publisher: MCG
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Question
Chapter 18, Problem 1DYKB
Summary Introduction

Introduction:

Blood is a connective tissue which flows from the heart through arteries and veins to all body parts. Whole blood consists of two elements- formed elements and plasma. The total volume of formed elements in the blood which are erythrocyte, platelets, and leukocytes is called as hematocrit. But clinically the total percentage of erythrocytes in blood is known as hematocrit.

Expert Solution & Answer
Check Mark

Answer to Problem 1DYKB

Correct answer:

The value of hematocrit varies according to sex and age of individuals. The hematocrit of very young children may vary from 30%to60% . Adult males have more hematocrit volume than adult females. The reason for this is testosterone hormone in males that stimulates the production of erythropoietin from kidney that promotes the production of the erythrocyte. In males, the hematocrit ranges from 42%and56% and adult females it ranges between 38%to46% . The value of hematocrit increases in the condition of dehydration. Therefore, option b. is correct.

Explanation of Solution

Reason for the correct statement:

Option b. is given as “a dehydrated adult male”. The percentage of hematocrit is affected by dehydration condition. If a person has a high hematocrit range it means the person is either suffering from dehydration or is involved in blood doping. As the value of hematocrit is already higher than children and females, its value will increase more in dehydration condition. Thus, the hematocrit value of a dehydrated male will be maximum. Hence; the hematocrit value would be highest in a dehydrated male.

Hence, option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “a 10-year old child”. The hematocrit of very young children may vary from 30%to60% . The range of a dehydrated male is more as compared to a ten-year-old child. Hence, option a. is incorrect.

Option c. is given as “a healthy, nonmenstruating female”. In adult females, the hematocrit value ranges between 38%to46% which is less than a ten-year-old child. Hence, option c. is incorrect.

Option d. is given as “a healthy, menstruating adult female”. In adult females, the hematocrit value ranges between 38%to46% . It decreases in menstruating females due to blood loss. Hence, option d. is incorrect.

Hence, options a., c., and d. are incorrect.

Conclusion

The hematocrit range value would be highest in a ten-year-old boy than a dehydrated male and a healthy female.

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Chapter 18 Solutions

LAB MANUAL:MCKINLEY'S ANATOMY & PHYSIOL

Ch. 18.3 - Prob. 12WDYLCh. 18.3 - Prob. 13WDYLCh. 18.3 - Prob. 14WDYLCh. 18.3 - Prob. 15WDYLCh. 18.3 - Prob. 16WDYLCh. 18.3 - Describe the process of erythropoiesis, beginning...Ch. 18.4 - Prob. 17WDYLCh. 18.4 - Prob. 18WDYLCh. 18.4 - Prob. 19WDYLCh. 18.4 - Prob. 20WDYLCh. 18.4 - At what point in blood loss is the sympathetic...Ch. 18.4 - Prob. 22WDYLCh. 18.5 - Prob. 23WDYLCh. 18.5 - Prob. 24WDYLCh. 18 - Prob. 1DYKBCh. 18 - _____ 2. Which type of leukocyte increases during...Ch. 18 - Prob. 3DYKBCh. 18 - Prob. 4DYKBCh. 18 - Prob. 5DYKBCh. 18 - Prob. 6DYKBCh. 18 - Prob. 7DYKBCh. 18 - _____ 8. During the recycling of components...Ch. 18 - _____ 9. The extrinsic pathway of coagulation is...Ch. 18 - _____ 10. A clot is best described as a. an...Ch. 18 - How does blood help regulate body temperature?Ch. 18 - What are alpha- and beta-globulins? What do they...Ch. 18 - When blood is centrifuged, a thin, whitish-gray...Ch. 18 - What is the shape of an erythrocyte, and why is...Ch. 18 - How are respiratory gases (oxygen and carbon...Ch. 18 - What are the anatomic characteristics of each type...Ch. 18 - How do the functions of basophils differ from...Ch. 18 - Briefly describe the origin, structure, and...Ch. 18 - Prob. 19DYKBCh. 18 - Describe the three phases of hemostasis, and list...Ch. 18 - Use the following paragraph to answer questions...Ch. 18 - Prob. 2CALCh. 18 - Which sequence or pathway best describes the...Ch. 18 - Prob. 4CALCh. 18 - Prob. 5CALCh. 18 - While taking a clinical laboratory class, Marilyn...Ch. 18 - Abby is a nurse on duty in a hospital emergency...Ch. 18 - Prob. 3CSL
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