Bio 251 - EXAM 2

Bio 251 - EXAM 2Which of the following statements about how the skin prevents disease is false? a) salt in sweat retards microbial growth b) the skin is the most common route for organisms to penetrate the body c) oil glands on the skin make it waterproof d) native microbes that live on your skin help protect you from infection Correct answer is b) the skin is the most common route for organisms to penetrate the body This antimicrobial protein is found at high levels in lacrimal secretions (tears) a) lysozyme b) defensins c) sebum d) C3b Correct answer is a) lysozyme Which component of the compliment system would stimulate neutrophils to phagocytize an attached cell? a) C5a b) C5b c) C3a d) C3b d) C3b Which of the following would prevent a microbe from activating the Alternative pathway of the compliment system? a) a bacteria that has an enzyme that degrades antibodies b) a bacteria that has a thick cell wall c) a bacteria that can prevent C3b from binding to it d) a bacteria that contain no mannose Correct answer is c) a bacteria that can prevent C3b from binding to it Which of the following is NOT a feature of the skin that allows it to serve as a barrier to infection? a)