Why is osmolality preferred over osmolarity as the measurement of osmotic activity in the clinical assessment of individuals? - Answer>>> More of the weight of plasma is influenced by solutes, such as protein and glucose
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Why is osmolality preferred over osmolarity as the measurement of osmotic activity in the clinical assessment of individuals? - Answer>>> More of the weight of plasma is influenced by solutes, such as protein and glucose, rather than by water.
Rationale: In plasma, less of the plasma weight is water; therefore the overall concentration of particles is greater. The osmolality will be greater than the osmolarity because of the smaller proportion of water. Osmolality is thus the preferred measure of osmotic activity in clinical assessment of individuals.
Which type of cell adaptation occurs when normal columnar ciliated epithelial cells of the bronchial lining have been replaced by stratified squamous epithelial cells?
a. Hyperplasia
b. Dysplasia
c. Metaplasia
d. Anaplasia - Answer>>> C. Metaplasia is the reversible replacement of one mature cell by another, sometimes a less differentiated cell type. The best example of metaplasia is the replacement of normal columnar ciliated epithelial cells of the bronchial (airway) lining by stratified squamous epithelial cells. The other options do not accurately describe the event in the question.
What organic compound facilitates transportation across cell membranes by acting as receptors, transport channels for electrolytes, and enzymes to drive active pumps? - Answer>>> Proteins
Rationale: Proteins act as (1) recognition and binding units (receptors) for substances moving in and out of the cell; (2) pores or transport channels for various electrically charged particles called
ions or electrolytes and specific carriers for amino acids and monosaccharides; and (3) specific enzymes that drive active pumps that promote the concentration of certain ions, particularly potassium (K+), within the cell while keeping concentrations of otherions, for example, sodium (Na+), below the concentrations found in the extracellular environment.
Understanding the various steps of proteolytic cascades, such as caspase- mediated apoptosis and complement cascades, may be useful in designing drug therapy for which human diseases? - Answer>>> Autoimmune and malignant disorders
Rationale: Understanding the various steps involved in this process is crucial for designing drug interventions. Dysregulation of proteases features prominently in many human diseases, including cancer, autoimmunity, and neurodegenerative disorders.
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