Chemical messengers produced by endocrine glands are called

a. agonists
b. neurotransmitters
c. hormones
d. enzymes


Answer: c. hormones

Biology & Microbiology

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Sking and answering questions about the world in an unbiased manner is referred to as ____

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Developing vaccines for humans relies heavily on manipulating and engineering vectors

Indicate whether the statement is true or false.

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The oxygen needed for respiration moves from the lungs and into capillaries by simple diffusion. Once in the capillaries, what molecule or other component of blood is responsible for transporting oxygen in the circulatory system?

A. There is no transport molecule; oxygen remains free in the blood. B. white blood cells C. hemoglobin D. cadherins

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How many nucleotides form the code for one amino acid?

A. 2 D. 5 B. 3 E. 6 C. 4

Biology & Microbiology