When you cut yourself, the damaged cells immediately release which of the following chemical alarm signals?

A) defensive proteins
B) antibodies
C) histamine
D) antihistamines


C

Biology & Microbiology

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Cyanide poisons mitochondria by blocking the final step in the electron transport chain. Human red blood cells placed in an isotonic solution containing cyanide are likely to _____

A) retain the normal cell shape, but the mitochondria will be poisoned B) lyse as the cyanide concentration increases inside the cell C) switch to anaerobic metabolism D) become unable to carry oxygen E) be unaffected

Biology & Microbiology

Hair follicles and blood vessels are found in which layer of the skin?

a. epidermis b. dermis c. subcutaneous tissue d. stratum basale e. stratum corneum

Biology & Microbiology

This emerging field looks at when, where, and how much mRNA is expressed from a gene. 

A. genomics B. transcriptomics C. proteomics D. cloning technology

Biology & Microbiology

What are leukocidins?

A) Molecules that are capable of destroying phagocytes B) Molecules that can degrade IgA C) Molecules that destroy the complement proteins

Biology & Microbiology