Digested fats enter the lymphatic circulation through special capillary vessels called:
Lacteals
Peyer patches
Kupffer cells
Lymph capillaries
The Correct Answer is A
A. Lacteals are specialized lymphatic capillaries located in the villi of the small intestine. They absorb digested fats (in the form of chylomicrons) and transport them into the lymphatic system, eventually entering the bloodstream.
B. Peyer patches are clusters of lymphoid tissue found in the small intestine, important for immune surveillance, but they are not involved in fat absorption.
C. Kupffer cells are specialized macrophages in the liver that filter blood, not involved in lymphatic fat transport.
D. Lymph capillaries generally collect interstitial fluid to form lymph, but lacteals are the specific type of lymph capillary responsible for absorbing dietary fats.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
The right lymphatic duct drains lymph from the right side of the head, neck, right arm, and right side of the chest, including the right breast (right mammary vessels).
A. Right Tibial vessels drain lymph from the lower legs, which eventually drains into the thoracic duct, not the right lymphatic duct.
B. Right iliac vessels drain lymph from the pelvic region and also empty into the thoracic duct, not the right lymphatic duct.
D. Right femoral vessels drain lymph from the lower limbs, and their lymph also eventually drains into the thoracic duct.
Correct Answer is B
Explanation
A. T cells "mature" and become fully functional in the thymus – T cells are produced in the bone marrow, but they mature in the thymus. In the thymus, T cells undergo a selection process to become functional and capable of recognizing specific antigens.
B. T cells are produced by stem cells in bone marrow – T cells originate from stem cells in the bone marrow, where they first begin to develop. However, they mature in the thymus.
C. T cells are produced in the spleen – This is incorrect. While the spleen plays a role in immune responses, T cells are not produced there; they are produced in the bone marrow.
D. T cells "mature" and become fully functional in the tonsils – This is incorrect. Tonsils are part of the lymphatic system and play a role in immune defense, but T cells do not mature there; they mature in the thymus.
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