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

Tags

NGSS.HS-LS1-3

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

Tags

NGSS.HS-LS1-3

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

Tags

NGSS.HS-LS1-3

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