Refer to Figure 50-2. The function of the structure labeled 3 is:
a. to secrete an alkaline fluid that neutralizes the acids of the vagina.
b. to produce a nutritive fluid for the sperm.
c. to provide a place for maturation and storage of sperm.
d. to secrete mucus that lubricates the penis.
e. None of these.
A
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Members of the ________ genus are the MOST abundant bacteria present in the large intestine of humans and contain the unusual ________ in their cell membranes
A) Bacteroides / glycerolipids B) Bacteroides / sphingolipids C) Sphingobium / glycerolipids D) Sphingobium / sphingolipids
________ nucleotides are common signals in animal cells but not in plant cells.
Fill in the blank(s) with the appropriate word(s).
Both Streptococcus pyogenes and Corynebacterium diphtheriae are highly pathogenic, and the disease symptomology can be very severe. Why is this?
A. They induce autoimmune states in the patients. B. There are no antibiotics useful for diseases caused by these bacteria. C. Infants and children are the high-risk groups, and their mortality rate is higher than for other ages. D. Both bacteria produce potent exotoxins.
__________ are cells that synthesize bone, whereas
__________ break bone down. Fill in the blank(s) with the appropriate word(s).