Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

004Epithelium Tissue

All things epithelia

QuestionAnswer
Primary type of tissue; lines body surface and all body cavities; glands are made of these; little to no extracellular matrix Epthelial tissue
Primary functions of epithelium protection absorption, secretion, and ion transport filtration forms slippery surfaces
What type of cellularity do epithelia have? Fit closely together
Explain the polarity of epithelia. Two surfaces: apical (free surface) and basal (basement membrane)
Where are the junctions on epithelia? Lateral surfaces
Epithelia lack a blood supply. They are ______. How do they gain nutrients? Avascular; diffuse from tissues below
Do nerve endings penetrate epithelial sheets? Yes; innervated
How do epithelial cells regenerate? Cell division; high regeneration capacity
What is the underlying tissue of epithelia? Connective tissue provides support
What are the lateral surface features of epithelia? cell junctions
What is the basal surface feature of epithelia? basement membrane
What are the apical surface features of epithelia? Microvilli and cilia
Name the 4 types of cell junctions. Tight junction Adhering junction Desmosome Gap junction
Like a belt, found in the apical region of epithelial cells, closes off the extracellular space Tight junction
Like velcro, found just below the tight junction, this anchoring junction reinforces tight junctions with transmembrane interlocking proteins between cells Adhering junction
Main junction for binding cells together, like rivets, linker proteins join plaques located on the cytoplasmic face of each cell. Holds adjacent cells together and creates one continuous network of strong wires. Desmosome
What is the structure of a desmosome? Circular plaques on each plasma membrane, joined by linker proteins. Bundles of filaments extend across the cytoplasm through the linker proteins and anchor at other desmosomes on the opposite side of the same cell.
Where can desmosomes be found? Anywhere there is great mechanical stress: cardiac muscle tissue and epithelial tissues.
What two things make up the basement membrane? basal lamina and reticular lamina
Simple squamous epithelium features - single layer of flat cells with disc-shaped nuclei -passive diffusion and filtration; secretes lubricating substances - thin walls of air sacs in lungs
What are the two types of simple squamous epithelium? Endothelium and mesothelium
Like a pipe, occurs anywhere along the lateral membranes of adjacent cells. Allows small molecules to move directly between neighboring cells. Gap junction
Where are gap junctions commonly found? Embryonic tissue, connective tissue, smooth and cardiac muscle
Type of gland that lacks ducts and secretes hormones. Uses blood for transport. Endocrine gland
What are the two ways to classify glands? 1. Mode of secretion 2. number of cells
What is the definition of gland? One or more cells that secrete(s) a particular product
Type of gland that empties through ducts to the epithelial surface: sweat and oil glands, mucus-secreting, salivary, liver, pancreas Exocrine gland
Type of gland that is located within epithelial sheets Unicellular
Type of gland that develops by invagination of epithelium Multicellular
Unicellular exocrine gland that secretes mucus Goblet cell
Product is released from secretory vesicles by exocytosis. Most common mode of secretion. No loss of cytoplasm. Merocrine
Involves the loss of cytoplasm as well as the secretory product. Apical portion of the cytoplasm becomes packed with secretory vesicles and is then shed. Apocrine
Entire cell becomes packed with secretory products and then bursts, releasing the secretion and killing the cell. Further secretion depends on the replacement of destroyed gland cells by the division of stem cells. Holocrine
What gland uses a combo of merocrine and apocrine secretions? Mammary glands
Created by: taboogle
Popular Biology sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards