Which of the following is INCORRECTLY paired concerning their regenerative capacity?
Cardiac muscle tissue has a moderate regenerating capacity.
Nervous tissue of the brain has virtually no functional regenerative capacity.
Blood forming tissue regenerates extremely well.
Smooth muscle tissue has a moderate regenerating capacity.
The Correct Answer is A
A. Cardiac muscle tissue has a moderate regenerating capacity: Cardiac muscle tissue has very limited regenerative ability, and damage usually results in fibrous scar tissue formation rather than restoration of contractile cells. This makes recovery from cardiac injury functionally compromised.
B. Nervous tissue of the brain has virtually no functional regenerative capacity: Neurons in the central nervous system have minimal ability to repair themselves after injury. Glial cells may provide some structural support, but true neuronal regeneration and recovery of lost functions rarely occur.
C. Blood forming tissue regenerates extremely well: Hematopoietic tissue within the bone marrow continually replenishes red cells, white cells, and platelets. It is highly regenerative and capable of rapid recovery following injury or cell loss.
D. Smooth muscle tissue has a moderate regenerating capacity: Smooth muscle cells retain the ability to divide and repair after damage. While not as fast as epithelial or hematopoietic tissue, their regenerative ability is sufficient to restore some function over time.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. cartilage CT:Cartilage connective tissue provides structural support in joints, the respiratory tract, and the ear, but it is not a component of spleen or lymph nodes, which require a softer supportive framework.
B. reticular CT:Reticular connective tissue forms a delicate, branching network of fibers that supports lymphocytes and other immune cells in organs like the spleen and lymph nodes. This framework helps filter body fluids and supports immune function.
C. adipose CT:Adipose connective tissue stores energy and provides insulation and cushioning. While it may surround organs, it does not form the internal supportive framework of lymphatic organs.
D. smooth MT:Smooth muscle tissue is found in the walls of hollow organs, blood vessels, and the digestive tract. It plays a role in involuntary movement, not in forming the supportive structure of lymphoid organs.
Correct Answer is E
Explanation
A. squamous epithelial cell:Squamous epithelial cells form flat layers of tissue that provide a protective barrier. They are not involved in antigen presentation or immune surveillance like dendritic cells.
B. muscle cell:Muscle cells are specialized for contraction and movement. They do not participate in immune responses or capture antigens, so they are not related to dendritic cell function.
C. melanocyte:Melanocytes produce melanin to protect the skin from UV damage. While both are found in the epidermis, dendritic cells function in immune defense rather than pigmentation.
D. nerve cell:Nerve cells transmit electrical signals to communicate sensory or motor information. They do not process antigens or trigger immune responses, unlike dendritic cells.
E. macrophage:Dendritic cells are specialized antigen-presenting cells closely related to macrophages. They capture, process, and present antigens to T cells, initiating adaptive immune responses in the skin and other tissues.
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