Based on the Circadian Cycle, the Body Prepares for Sleep

question 30

Multiple Choice

Based on the circadian cycle, the body prepares for sleep at night by decreasing the body temperature and releasing which chemical?

• A) Neonephrine
• B) Seratonin
• C) Melatonin
• D) Dopamine

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Definitions:

Photosynthesis Efficiency

The ability of plants to convert light energy from the sun into chemical energy stored in organic compounds with minimal energy loss.

Hot Dry Climates

Climates characterized by low humidity and high temperatures, often found in desert regions and areas with a long dry season.

CAM Plant

Plant that carries out crassulacean acid metabolism; carbon is initially fixed into organic acids at night in the reaction of CO2 and phosphoenolpyruvate, catalyzed by PEP carboxylase; during the day the acids break down to yield CO2, which enters the Calvin cycle. Compare with C3 plant and C4 plant.

Calvin Cycle

A series of biochemical redox reactions that take place in the stroma of chloroplasts in photosynthetic organisms and is a light-independent reaction.