When damage occurs to ________, nerve impulse transmissions are slowed.

A. the myelin sheath

B. leukocytes

C. epithelial cells

D. adipocytes

E. chondrocytes


A. the myelin sheath

Biology & Microbiology

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Symptoms of delayed-type hypersensitivity may appear several hours to days after secondary exposure to the eliciting antigen

Indicate whether the statement is true or false.

Biology & Microbiology

Which of the following pertains to both tetanus and foodborne botulism?

A. They are caused by enterotoxins of the pathogen. B. They occur when endospore-contaminated soil enters deep wounds. C. Nausea and diarrhea are symptoms. D. An exotoxin blocks acetylcholine release. E. Treatment involves antitoxin therapy.

Biology & Microbiology

Gram-positive bacteria have ____ and appear ____ under the microscope after Gram staining.

A. thick cell walls; pink B. thick cell walls; purple C. thin cell walls; pink D. thin cell walls; purple E. thin cell walls; blue

Biology & Microbiology

Three molecules of the fatty acid in question 8 are joined to a molecule of glycerol (C3H8O3). The resulting molecule has the formula:

a. C48H96O6 b. C48H98O9 c. C51H102O8 d. C51H98O6 e . C51H98O6

Biology & Microbiology