Question

what are hormones?
lipids that store energy in the body.
the basic building blocks of proteins in the human body.
chemical messengers that are released into the synapses between neurons.
chemical messengers that are released into the bloodstream to produce a specific effect.
proteins that support muscle growth and repair.

Explanation:

Hormones are chemical messengers. They are secreted by endocrine glands into the bloodstream. Their function is to travel to target cells or organs to produce a specific effect. For example, insulin (a hormone) is released into the bloodstream to regulate blood - glucose levels.

• Lipids that store energy in the body are more related to fats like triglycerides.
• The basic building blocks of proteins are amino acids.
• Chemical messengers in synapses between neurons are neurotransmitters.
• Proteins for muscle growth and repair are things like myofibrillar proteins (e.g., actin and myosin).

Answer:

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