The type of membrane that covers the heart is called a
Select one :
a . mucous membrane .
b . serous membrane .
c . basement membrane .
d . pleural membrane .
e . plasma membrane .
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Question 9
Which type of cell will produce antibodies that are released into the bloodstream ?
Select one :
a . B cell
b . T cell
c . plasma cell
d . memory cell
e . mast cell
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