Question

hormones are...

a. essential nutrients that must be obtained by food
b. signalling molecules transported in the blood
c. proteins that facilitate chemical reactions
d. small proteins that function in immune defenses
e. substances that make you crazy

steroids are...

a. mostly synthesized from cholesterol
b. a class of medications, including powerful anti-inflammatories
c. a class of lipid molecules, including the sex hormones
d. body-building drugs that make you crazy
e. all of these - but maybe not d

Explanation:

Analyze definition of hormones

• Hormones are chemical messengers produced by glands.
• They are signaling molecules transported through the circulatory system (blood) to target distant organs.
• This matches option B.

Analyze definition of steroids

• Steroids are a class of hydrophobic lipid molecules characterized by a carbon skeleton with four fused rings.
• They include cholesterol, as well as steroid hormones such as sex hormones (estrogen, progesterone, testosterone).
• This matches option C.

Answer:

Question 1

• (A) Essential nutrients that must be obtained by food
• (B) Signalling molecules transported in the blood (Correct answer)
• (C) Proteins that facilitate chemical reactions
• (D) Small proteins that function in immune defenses
• (E) Substances that make you crazy

Question 2

• (A) Mostly synthesized from cholesterol
• (B) A class of medications, including powerful anti-inflammatories
• (C) A class of lipid molecules, including the sex hormones (Correct answer)
• (D) Body-building drugs that make you crazy
• (E) All of these - but maybe not D