Chapter 20, Problem 1CYR

Which of the following is not a function of the lymphatic system?

a. Absorption of dietary fats

b. Secretion of digestive enzymes

c. Regulation of interstitial fluid volume

d. Housing and maturation of leukocytes

Summary Introduction

Introduction:

The part of a vascular system that has a large network of lymphatic vessels, which are involved in carrying lymph (clear fluid) toward the heart, is the lymphatic system. Lymph contains white blood cells and helps in their transport. The organs of the lymphatic system are the thymus, appendix, tonsils, and spleen.

Answer to Problem 1CYR

Correct answer:

The secretion of the digestive enzyme is a function that is not performed by the lymphatic system.

Explanation of Solution

Justification/explanation for the correct answer:

Option (b) states that digestive enzyme secretion is not a function of the lymphatic system. The lymphatic system has three major roles to play in the body. These include the regulation of the volume of the interstitial fluid. The dietary fats are absorbed in the body with the help of the lymphatic system. The lymphatic system is also involved in immune functions. This system does not play any role in the secretion of any of the digestive enzymes. Hence, option (b) is correct.

Explanation for the incorrect answer:

Option (a) states that the absorption of dietary fats is not a function of the lymphatic system. However, large products of fat breakdown are capable of entering the lymphatic vessels, which aid the function of the absorption of dietary fats. So, it is an incorrect option.

Option (c) states that the regulation of the volume of interstitial fluid is not a function of the lymphatic system. The lymphatic vessels help aid in maintaining the volume of interstitial fluids by picking up excess interstitial fluid and transporting it through the body. So, it is an incorrect option.

Option (d) states that housing as well as maturating leukocytes is not a function of the lymphatic system. The lymphatic system houses various types of leukocytes (white blood cells). These are the cells of the immune system. The thymus is a part of the lymphatic vessel where the maturation of leukocytes occurs. So, it is an incorrect option.

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

Conclusion

Thus, it can be concluded that the lymphatic system is not involved in the secretion of any digestive enzymes. It is involved in other functions, such as the removal of extra fluid from the body, fat absorption, and immune cell production as well as maturation.