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 C
Explanation
A. stratum basale:This is the deepest layer of the epidermis, consisting of mitotically active basal cells. Its main function is cell division and replacement of superficial layers, not the initiation of keratinization.
B. stratum lucidum:This clear layer is found only in thick skin, such as the palms and soles. It contains densely packed keratin, but keratinization has already occurred before this stage.
C. stratum spinosum:Cells in this layer begin producing keratin and keratohyalin, initiating the process of keratinization. The spiny appearance of the cells is due to desmosomal attachments, which help strengthen the epidermis.
D. stratum corneum:This outermost layer is composed of fully keratinized, dead cells. By this stage, keratinization is complete, and cells are flattened, providing a protective barrier.
Correct Answer is E
Explanation
A. Merocrine; holocrine:Merocrine glands secrete their products via exocytosis, and holocrine glands release entire cells, but this distinction does not directly describe mucus versus watery secretions.
B. Endocrine; exocrine:Endocrine glands release hormones into the bloodstream, and exocrine glands secrete onto surfaces or into ducts. This classification does not specify the type of fluid produced, such as mucus or watery secretions.
C. Serous; mucous:Serous glands produce a watery, protein-rich secretion, while mucous glands produce thick, sticky mucus. This reverses the secretion types described.
D. Apocrine; mixed:Apocrine glands release portions of cells along with secretions, and mixed glands can produce both mucus and serous products. While related, this does not Correct answer the distinction between mucus and watery fluids.
E. Mucous; serous:Mucous glands secrete mucus, which combines with water to form a thick, sticky product, whereas serous glands produce a relatively watery, enzyme-rich fluid. This accurately distinguishes the two secretion types.
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