Examlex
Invertebrates that feed on the algal coating of stones and rubble in streams and rivers are referred to as ________.
Organs
Structures composed of different tissues that perform specific functions within an organism, such as the heart, liver, or lungs.
Melatonin
A hormone produced by the pineal gland that regulates sleep-wake cycles.
Pituitary Gland
A small endocrine gland in the brain that produces hormones which regulate vital body functions and other endocrine glands.
Glutamate
An important neurotransmitter in the brain involved in learning, memory, and the regulation of the nervous system.
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