Among the Natural Defenses Present in Tears Is the Protein

question 54

Multiple Choice

Among the natural defenses present in tears is the protein lactoferrin. As you can infer from its name, it is also present in milk and other body secretions, and its function involves binding iron ions.
The presence of lactoferrin in tears is protective against bacterial infection because _______.

• A) all pathogens must acquire iron from their environment and lactoferrin ensures that the iron concentration is low
• B) in the presence of lysozyme, as found in tears, the proteins form a protective barrier on the lens
• C) pathogens with magnetosomes will be segregated from the eye tissue and swept away by the tears
• D) free iron serves as an immune signal to recruit T cells to the eye

Learn the importance of following protocol for blood specimen handling and processing.

Understand the physiological basis for venous and capillary blood draws.

Identify veins suitable for venipuncture and factors affecting vein selection.

Recognize the role of various blood collection tubes and their specific uses.

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Definitions:

Conversion Cost

The total expense of converting raw materials into finished goods, including both direct labor and manufacturing overhead.

Manufacturing Overhead

Indirect factory-related costs that are incurred when a product is manufactured, including costs for management, equipment maintenance, and factory utilities.

Direct Labor Cost

This cost includes wages and benefits paid to employees who are directly involved in producing goods or providing services.

Product Costs

Expenses directly associated with the production of goods, including materials, labor, and overhead costs.