Endocrine System Quiz

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Questions and Answers

How do hormones act on their target cells?

By direct fusion with the cell membrane
By diffusing through the cytoplasm
By releasing enzymes into the extracellular space
Through their receptors (correct)

What is an example of paracrine secretion?

Insulin-like growth factor (IGF) production
Synthesis of nutrients in endocrine cells
Antibody production in adjacent cells
Gastrin reaching fundic glands (correct)

What is the nature of endocrine glands?

They secrete enzymes that act locally on adjacent cells
They synthesize nutrients for the body's energy production
They produce antibodies for immune response
They secrete hormones that are taken up by capillaries and distributed throughout the body (correct)

What is the characteristic of juxtacrine secretion?

Signaling molecules remain on the secreting cell’s surface or adjacent extracellular matrix and affect target cells when the cells make contact (C) Signup and view all the answers

What is the function of a feedback mechanism in controlling hormone secretion?

Helps in controlling hormone secretion and keeps the blood hormonal levels within strict limits (B) Signup and view all the answers

Which type of hormone secretion involves localized dispersal in interstitial fluid or through short loops or blood vessels?

Paracrine (A) Signup and view all the answers

What is the characteristic of juxtacrine secretion?

Signaling molecules remain on the secreting cell's surface or adjacent extracellular matrix and affect target cells when the cells make contact. (C) Signup and view all the answers