Which of the following is not characteristic of lymphatic vessels?
They have thin walls
They can contract to propel lymph
They transport lymph to the tissues
They are blind-ended
The Correct Answer is C
A. They have thin walls – Lymphatic vessels have thin walls, similar to veins, which allow for the passage of lymph.
B. They can contract to propel lymph – Lymphatic vessels do have the ability to contract, aided by smooth muscle and valves, which helps propel lymph in the right direction.
C. They transport lymph to the tissues – This statement is incorrect. Lymphatic vessels carry lymph away from the tissues (not to the tissues) and toward lymph nodes and eventually to the bloodstream.
D. They are blind-ended – Lymphatic capillaries are indeed blind-ended, meaning they begin as closed-ended tubes that absorb interstitial fluid from tissues.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Pharyngeal tonsils (also called adenoids) are located in the nasopharynx, not at the back of the tongue.
B. Palatine tonsils are located on either side of the back of the throat, not at the back of the tongue.
C. Lingual tonsils are small mounds of lymphoid tissue located at the base of the tongue, and they help protect the body from pathogens entering through the oral cavity.
D. Adenoids are another term for the pharyngeal tonsils, which are located in the nasopharynx, not at the back of the tongue.
Correct Answer is C
Explanation
A. The inguinal lymph nodes are not part of the hepatic portal system. The hepatic portal system refers to the venous system that directs blood from the digestive organs to the liver, while the inguinal lymph nodes are involved in immune function.
B. The inguinal lymph nodes do not line the entrance of the spleen. The spleen is located in the upper left abdomen and has its own set of immune cells but does not directly connect to the inguinal lymph nodes.
C. The inguinal lymph nodes are located in the groin area. They are part of the body's lymphatic system and help filter lymph fluid from the lower extremities and genital region.
D. Kupffer cells are specialized macrophages found in the liver, not in the inguinal lymph nodes. These cells are involved in the filtration of blood and the removal of pathogens and debris.
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