4. Blind ended capillaries associated with gut are termed a. lymph nodules or fo

Question

4. Blind ended capillaries associated with gut are termed a. lymph nodules or follicles b. lymph nodes c. lacteals d. germinal centers 5. Lymph transport involves all but which of the following? a. milking action of active muscle fibers b. thorax pressure changes during breathing c. smooth muscle contraction in the lymph capillary walls d. lymph capillary minivalve action 6. The thymus is most active during. a. early childhood b. middle age c. old age d. adolescence 7. Which of the following is not a method that maintains lymph flow? a. skeletal muscle contraction b. breathing c. valves in lymph vessel walls d. capillary smooth muscle contraction 8. Which of the following is not a function of the inflammatory response? a. prevents the spread of the injurious agent to nearby tissue

Explanation / Answer

4. Ans- c

A lacteal is a lymphatic capillary which absorbs dietary fats in the villi of the small intestine. Lacteals are larger than blood capillaries and are closed on one end. Each intestinal villus is provided with a blind ended capillary called lacteal.

5.Ans-c

Lymph transport-

A) Milking action of skeletal muscles

B) Pressure changes in the thorax during breathing

C) Numerous valves in lymphatic vessel. When fluid pressure in the interstitial space is greater than the lymphatic capillaries then the minivalve flaps open and allow fluid to enter the lymphatic capillary.

D) Pulsations of nearby arteries

6.Ans-a

Thymus is a primary lymphoid organ and most active between birth and puberty then begins to atrophy in which the size and activity are reduced dramatically.

7.Ans-d

Lymph blood flow is dependent on skeletal muscle contractions and differences in thoracic pressures due to respiratory movement. Lymph flow is maintained by a combination of hydrostatic forces and augmentation of skeletal muscle contraction in the limbs by opening and closing of lymphatic valves.

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