_________________ are the chemical messengers that are secreted directly into ...

Topics: Endocrinology Quiz

_________________ are the chemical messengers that are secreted directly into the bloodstream.
A. Amino Acids
B. Hormones
C. Lipids
D. Neurotransmitters

Select your answer:

Topics:

Respiratory and Circulatory Lifetime Wellness Urinary System and Fluid Balance Transportation and Excretion Body Fluids & Circulation Auditory and Vestibular Neurology Genetic Diseases Macronutrients & Micronutrients Regulating the Cell Cycle Pulse Pathology Body Systems Respiration in Organisms Obesity Musculoskeletal/Endocrine Systems

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