Endocrine System Review

What are glands?

• Organs that make and excrete waste

• Organs that make and release secretions

• Organs that make and release white blood cells

• Organs that make and excrete carbon dioxide

What is one difference between exocrine and endocrine glands?

• Exocrine and endocrine glands both release secretions into the blood

• Exocrine and endocrine glands both release secretions into open space

• Exocrine glands - release secretions into the blood

  Endocrine - release secretions into open space

• Exocrine glands - release secretions into open space

  Endocrine - release secretions into the blood

Endocrine glands DO NOT...

• Contain ducts

• Secrete into the blood

• Secrete hormones

• Affect homeostasis

Which organ is both an exocrine gland AND an endocrine gland?

• Parathyroid

• Kidneys

• Liver

• Pancreas

Which two body systems work together to regulate all other systems and maintain homeostasis?

• Excretory and endocrine

• Nervous and digestive

• Nervous and endocrine

• Endocrine and immune

Hormones travel through the blood and encounter many cells. How do they affect ONLY target cells?

• Target cells have receptors that match up with the hormone

• Target cells send out signals that attach to hormones and draw them to the cell

• Target cells have cell membranes with a different composition

• Magic!

Steroid hormones...

• Are lipid-like

• Can pass through cell membranes

• Use the one-messenger system

• All of the above

Protein hormones...

• Are amino acid chains

• Cannot pass through cell membranes

• Use the two-messenger system

• All of the above

What does your body do with excess hormones?

• Stores them in the liver

• Excretes them in urine

• Sends them to the brain

• Excretes them through the lungs

Positive feedback is rare in nature because it causes processes to increase without limit and does not maintain homeostasis. What is one example of positive feeback?

• Uterine contractions during labor

• Blood sugar regulation

• Blood calcium regulation

• Body temperature regulation