Fats absorbed from the small intestine are transported to the bloodstream via
lymph nodes
tonsils
Peyer's patches
lacteals
The Correct Answer is D
A. Lymph nodes: Lymph nodes filter lymph and provide immune surveillance, but they do not directly absorb or transport dietary fats from the small intestine to the bloodstream.
B. Tonsils: Tonsils are lymphoid tissues located in the pharynx that trap pathogens entering through the mouth or nose. They play no role in fat absorption or transport.
C. Peyer’s patches: Peyer’s patches are lymphoid follicles in the small intestine that monitor intestinal bacteria and facilitate immune responses. They are not involved in the absorption of dietary fats.
D. Lacteals: Lacteals are specialized lymphatic capillaries located in the villi of the small intestine. They absorb dietary fats in the form of chylomicrons and transport them via lymph to the bloodstream, bypassing the hepatic portal system.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Interfere with viral replication within cells:Interferons are signaling proteins released by virus-infected cells. They induce neighboring cells to produce antiviral proteins that inhibit viral replication, providing an early defense mechanism against viral infections.
B. Are virus-specific, so that an interferon produced against one virus could not protect cells against another virus:Interferons are not virus-specific. They provide broad antiviral protection by inducing general antiviral states in cells, making them effective against multiple types of viruses.
C. Are routinely used in nasal sprays for the common cold:Interferons are not routinely used as nasal sprays for the common cold due to side effects and limited effectiveness in treating mild viral infections. Their use is primarily therapeutic in serious viral infections or certain cancers.
D. Act by increasing the rate of cell division:Interferons do not stimulate cell division. Instead, they modulate immune responses and activate antiviral defenses, including the production of proteins that inhibit viral replication.
Correct Answer is A
Explanation
A. Antigenic:“Antigenic” is not a classification of T cells. It describes a property of a substance that can trigger an immune response, not a type of T lymphocyte.
B. Cytotoxic:Cytotoxic T cells (CD8+) directly kill infected or abnormal cells. They are a major type of T cell responsible for cell-mediated immunity and defense against viruses and cancer cells.
C. Regulatory:Regulatory T cells (Tregs) modulate the immune response by suppressing excessive or inappropriate activation. They help maintain immune tolerance and prevent autoimmune reactions.
D. Helper:Helper T cells (CD4+) assist other immune cells by releasing cytokines that stimulate B cells, cytotoxic T cells, and macrophages. They are essential for orchestrating the adaptive immune response.
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