All of the following represent physical and/or chemical barriers that form the body's first line of defense against pathogens EXCEPT which one?

A) tears
B) resident bacteria
C) skin surface
D) earwax
E) antibodies


E

Biology & Microbiology

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Obligately anaerobic normal flora are found in ________, which is an/are anoxic habitat(s) of the body

A) the kidneys B) the skin C) portions of the oral cavity D) the lungs

Biology & Microbiology

Explain how proprioceptors work

What will be an ideal response?

Biology & Microbiology

The modification of behavior as a result of experience is called  

A.  association. B.  behavior modification. C.  habituation. D.  learning. E.  sensitization.

Biology & Microbiology

Members of which of the following phyla would exhibit ostia and an osculum?

a) Cnidaria b) Cnetophora c) Nematoda d) Rotifera e) Porifera

Biology & Microbiology