What is an example of a molecule that can act as both a neurotransmitter and a hormone?  

A.  estrogen
B.  progesterone
C.  thyroxine
D.  norepinephrine
E.  insulin


D.  norepinephrine

Biology & Microbiology

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Most of the oxygen in the blood is transported

by a. plasma. b. megakaryocytes. c. platelets. d. hemoglobin. e. leukocytes.

Biology & Microbiology

From its atomic number of 15, it is possible to predict that the phosphorus atom has _____

A) 5 neutrons, 5 protons, and 5 electrons B) 15 neutrons and 15 protons C) 8 electrons in its outermost electron shell D) 15 protons and 15 electrons

Biology & Microbiology

The seriousness of Coccidioides infection can be attributed to the formation and rupture of spherules

Indicate whether the statement is true or false

Biology & Microbiology

Bacterial food poisoning resulting from Clostridium (botulinum/difficile/perfringens) contamination is characterized by watery diarrhea accompanied by intestinal cramping but not fever, and it resolves in about a day.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology