β cells in the islet of Langerhans of man comprise.
A
60% to 90%
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B
40% to 50%
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C
Less than 40%
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D
None of the above
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Solution
The correct option is A60% to 90% The islet of Langerhans mostly consists of β cells (70%) that secretes insulin. It also has α cells (20%) that secretes glucagon, and many other cells in small proportions.