Although initially thought to be due to an excessive amount of a particular neurotransmitter, mania has been found to be due to low levels of which neurotransmitter? norepinephrine serotonin dopamine acetylcholine

Which phrase best describes the main function of the stomach? A. contracts to move substances through the body B. provides structure and support C. removes metabolic waste products from the body D. breaks down food to acquire nutrients

Like complex carbohydrates, proteins are biomolecules that serve many functions and can be chemically broken down and restructured. Both proteins and complex carbohydrates are which of the following? A.) Polymers of smaller subunits B.

A doctor is at work taking care of sick patients. She spends a few minutes trying to figure out why a patient is sick. She taps the patients knee to test his reflexes. While she examines him, the patient coughs. B.

He medical term for this brief loss of consciousness caused by the decreased blood flow to the brain is

Which of the following statements is true about external and internal fertilization? A. Internal fertilization doesn't require sexual intercourse. B. External fertilization doesn't require sexual intercourse. C.

When an ocean wave reaches shallow water the energy of the wave ... A. pushes water up B. Returns water to the ocean C. Becomes stronger D. Disappears

By what process do all living organisms grow and repair themselves?

What is the name of the heart's contraction?

Which describes the habitat of a frog?

The size of a population refers to the