A college student had a depressed mood and trouble falling asleep. Which chemical neurotransmitter could cause such problems?

A. Acetylcholine
B. Epinephrine
C. Endorphins
D. Serotonin


Answer: D

Anatomy & Physiology

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A fertilized egg is called a/an ________.

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

Anatomy & Physiology

The last stage in bone repair is ________

A) Hematoma formation B) Soft callus formation C) Remodeling D) Bony callus formation

Anatomy & Physiology

Three nitrogenous base sequences on mRNA, which are complementary to gene triplets, are called

A) chromosomes. B) amino acids. C) codons. D) anticodons. E) histones.

Anatomy & Physiology

Clumps of atoms that are distributed throughout a water medium are referred to as a ____

a. solution b. compound c. colloid d. solute

Anatomy & Physiology