EXAMPLE 2:
Which one of the following is NOT true of human hormones?
A They are all released from glands and flow down ducts into the bloodstream.
B They are all chemicals.
C Some, such as testosterone and oestrogen, can be steroids.
D They travel at the speed of blood flow.
E A hormone may affect one or more structures in the body.
The answer is
A because, whilst hormones are released from glands, they do not travel
down ducts but are released directly into the blood stream.
B - hormones are indeed chemicals
C - the sex hormones named are steroid hormones
D - as they travel in the blood plasma, they will travel at blood plasma speed
E - a number of hormones have multiple and diffuse functions within the body
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