few more ans needed plz

[walnut]

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a little confused about these,if u cud help it wil be greatly appreciated.
1.cells are more permeable to

a.ethanol
b.sodium

2.streptococci of oral cavity
i know they r facultative.my confusion is are they non -hemolytic or alpha hemolytic.(viridans)
3. largest - smallest cusp of max first and man sec molars.

4.which of the foll is in the lobular area of liver
a.bile duct
b.h.artery
c. portal vein
d.central vein

 

[ksr]

the answer to the first question is that the cell membrane is impermeable to ethanol but permeable to sodium.
the answer to the second question is that the streptococcal species that are most abundant in the oral cavity{viridans, mutans etc} are alpha hemolytic

 

[Dent tex]

Ans for 4, is d. correct me if I am wrong.

 

[swetha_dentist]

the answer to the first question is that the cell membrane is impermeable to ethanol but permeable to sodium.
the answer to the second question is that the streptococcal species that are most abundant in the oral cavity{viridans, mutans etc} are alpha hemolytic

you mean during threash hold potential??