Epithelial Tissue Functions

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Questions and Answers

What is one of the primary functions of epithelial tissue?

Covering and lining body surfaces (correct)
Facilitating chemical reactions
Conducting electrical impulses
Storing fat and energy

Which process allows molecules to pass through a cell membrane without the need for energy?

Exocytosis
Facilitated diffusion (correct)
Endocytosis
Active transport

What term describes the movement of substances from the blood into the Bowman’s capsule in the kidneys?

Filtration (correct)
Secretion
Reabsorption
Diffusion

In the context of epithelial cells, what does absorption specifically refer to?

<p>Transfer of nutrients into the bloodstream (B)</p> Signup and view all the answers

How does secretion differ from absorption in epithelial function?

<p>Secretion is the release of substances into organs or the bloodstream, while absorption brings substances into the body (B)</p> Signup and view all the answers

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Study Notes

Epithelial Tissue Functions

Covers and lines the exterior of the body and interior of hollow organs, body cavities, and ducts.
Forms glands.
Protects organs and structures.
Facilitates movement of molecules and nutrients through processes like diffusion, filtration, secretion, and absorption.
Diffusion: The movement of small molecules across a cell membrane.
Facilitated Diffusion: The movement of ions with the help of membrane proteins.
Filtration: Occurs in the glomerulus of the kidney, where substances move from the blood into Bowman’s capsule.
Secretion: The movement of chemicals or molecules from a cell, often into the bloodstream or the lumen of a hollow organ.
Absorption: The movement of chemicals or molecules into the bloodstream, such as from the lumen of the digestive tract or through the skin.
In the kidney, molecules are reabsorbed through nephron epithelial cells from the lumen into the surrounding capillaries.