Question

bio - 202 topic 1: cellular communication and endocrine system physiology
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what are hormones?
lipids that store energy in the body.
chemical messengers that are released into the synapses between neurons.
proteins that support muscle growth and repair.
the basic building blocks of proteins in the human body.
chemical messengers that are released into the bloodstream to produce a specific effect

Explanation:

Hormones are chemical messengers. They are secreted by endocrine glands directly into the bloodstream. Once in the bloodstream, they travel to target cells or organs to produce a specific effect. For example, insulin is a hormone that regulates blood - glucose levels.

• Lipids that store energy in the body are like fats (e.g., triglycerides), not hormones.
• Chemical messengers released into synapses between neurons are neurotransmitters, not hormones.
• Proteins that support muscle growth and repair are things like myofibrillar proteins in muscle tissue, not hormones.
• The basic building blocks of proteins in the human body are amino acids, not hormones.

Answer:

Chemical messengers that are released into the bloodstream to produce a specific effect.