Hormones can enter the target cell

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Reference no: EM13531139

1. Respiratory dust particles that can reach alveoli have the sizes of
a) less than 2 nanometers
b) less than 2 microns
c) less than 5 microns
d) less than mm

2. Which of the following hormones can enter the targetcell?

a) thyroxine
b) estrogen
c) both a and b
d) neither a nor b

Please give a brief explanation!

Reference no: EM13531139

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