Lymph nodes do all of the following except:
Group of answer choices
A remove excess nutrients from the lymph.
B provide a site of antigen recognition by T cell and B cells
C monitor the contents of lymph.
D remove debris and pathogens from the lymph.
The correct answer and explanation is :
The correct answer is A. Remove excess nutrients from the lymph.
Explanation:
Lymph nodes are critical components of the lymphatic system, which plays a key role in the body’s immune response. They are small, bean-shaped structures that are distributed throughout the body. The primary functions of lymph nodes include filtering lymph, a fluid that circulates throughout the lymphatic system, and serving as a site for immune cell activation. Let’s review the functions described in the options:
A. Remove excess nutrients from the lymph – This is incorrect because lymph nodes do not remove excess nutrients from the lymph. The lymphatic system primarily deals with the transport of lymph, which contains waste products, immune cells, and other substances, not nutrients. Nutrient regulation occurs in the digestive and circulatory systems, not in the lymph nodes.
B. Provide a site of antigen recognition by T cells and B cells – This is correct. Lymph nodes are essential for immune function, as they provide a site where immune cells such as T cells and B cells can recognize and respond to pathogens. When foreign antigens (e.g., from bacteria or viruses) enter the lymph, they are presented to these immune cells in the lymph nodes, triggering an immune response.
C. Monitor the contents of lymph – This is correct. Lymph nodes act as monitoring stations for the lymph fluid, checking for the presence of pathogens, foreign particles, and abnormal cells. This constant surveillance allows the immune system to detect and respond to potential threats.
D. Remove debris and pathogens from the lymph – This is correct. One of the primary functions of lymph nodes is to filter the lymph and remove debris, pathogens, and other foreign material. Specialized immune cells called macrophages within the lymph nodes engulf and digest these particles.
Thus, the function of removing excess nutrients is not associated with lymph nodes, making option A the correct answer.