Question

1.

After reading the paragraphs below, answer the questions that follow.

Recent studies suggest that flame retardants, chemicals that are used to slow down burning, can mimic estrogen hormones found in the human body. Scientists investigating this phenomenon developed three-dimensional images to show how the chemical structure of certain flame retardants allows the retardants to bind to and inhibit an enzyme (estrogen sulfotransferase) that metabolizes estrogen.

Suppose the scientists want to conduct a study of the effects of flame retardants on estrogen levels. In a hypothetical study, the scientists use frogs to test the effects of flame retardants because the frogs' skin is highly permeable and therefore allows for easy absorption of chemicals.

The scientists collected 20 wild adult frogs and brought them to a laboratory. Ten of the frogs (group 1: five male and five female) were kept in tanks mimicking their natural environment. The other ten frogs (group 2: five male, five female) were kept in tanks like those of group 1 except they were introduced to low amounts of flame retardants in the shallow water in their tank. Estrogen levels were measured on the first day of the experiment and then every 4 days for 20 days.


Flame retardants are an example of

A.

endocrine disrupters.

B. androgens C. lipid-soluble hormones. D. progestins

2.

Which statement is  true?

		Hormones have a direct connection with target cells, while electrical signals do not.
		Effects of hormones last for brief periods of time, while effects of electrical signals last for long periods of time.
		Hormones travel via specific pathways to specific cells, while electrical signals travel through the blood to all areas of the body.
		It takes longer for hormones to be released into the bloodstream and be taken to target cells than it does for electrical signals to be transmitted.

Answer 1

The answer of the question is given below if you have any doubt then feel free to ask in the comment box and guys don't forget to trigger the thumbs up.

1. endocrine disruptors

2. It takes longer for hormones to be released into the bloodstream and be taken to target cells than it does for electrical signals to be transmitted.

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