Select the statement that correctly describes the differences between specific and nonspecific immunity.
A. Specific immunity is provided by epithelial tissues.
B. Only cells and tissues of both types of immunity express receptors for specific pathogens.
C. Nonspecific immunity is innate and genetically determined.
D. Nonspecific immunity relies on proper functioning of specific immunity for activation and recognition of pathogens.
Answer: C
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A) potassium. B) iron. C) sulfate. D) calcium. E) sodium.
Which statement best describes the importance of the biconcave shape of erythrocytes?
A) It conforms to the molecular shape of hemoglobin. B) It allows for the movement of erythrocytes out of the capillaries. C) It makes the erythrocyte small and flexible. D) It provides a large surface area for the exchange of gases. E) It allows for phagocytosis of foreign particles.
The process by which bleeding is stopped is called ________
A) hematopoiesis B) erythropoiesis C) homeostasis D) hemostasis
Which of the following skin cells does NOT play a role in immune function?
a. melanocytes b. keratinocytes c. dendritic cells d. Granstein cells e. All of these play a role in immune function.