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Questions and Answers
What do exocrine glands secrete their products into?
What do exocrine glands secrete their products into?
- Ducts (correct)
- Blood
- Interstitial fluid
- Lymph
What are exocrine glands?
What are exocrine glands?
Glands that secrete their products into ducts.
What defines an endocrine gland?
What defines an endocrine gland?
A gland that secretes hormones into interstitial fluid and then the blood.
Are endocrine glands vascular?
Are endocrine glands vascular?
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List the endocrine glands of the human body.
List the endocrine glands of the human body.
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What are some organs that are not exclusively endocrine glands but contain hormone-secreting cells?
What are some organs that are not exclusively endocrine glands but contain hormone-secreting cells?
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What is the basic difference between endocrine and exocrine glands?
What is the basic difference between endocrine and exocrine glands?
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What are the functions of hormones?
What are the functions of hormones?
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Study Notes
Exocrine Glands
- Secrete products through ducts to body cavities, organ lumens, or the body's outer surface.
- Types include sudoriferous (sweat), sebaceous (oil), mucous, and digestive glands.
Endocrine Glands
- Ductless glands that release hormones directly into interstitial fluid, which then enters the bloodstream.
- Highly vascularized, relying on the cardiovascular system for hormone distribution.
Key Endocrine Glands in Humans
- Major endocrine glands include the pituitary, thyroid, parathyroid, adrenal, and pineal glands.
Additional Hormone-Secreting Organs
- Organs with hormone-secreting cells, but not exclusively endocrine include hypothalamus, thymus, pancreas, ovaries, testes, kidneys, stomach, liver, small intestine, skin, heart, adipose tissue, and placenta.
Fundamental Differences
- Endocrine glands have secretions that diffuse into interstitial fluid and blood. Exocrine secretions flow through ducts to target locations.
Functions of Hormones
- Regulate chemical composition and volume of internal environment.
- Influence metabolism, energy balance, and contraction of smooth/cardiac muscle.
- Control glandular secretions and certain immune system functions.
- Essential for growth, development, reproductive system operation, and establishing circadian rhythms.
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