Term
| What are the 3 Major Salivary Glands? |
|
Definition
| Parotid, Submandibular, Sublingual |
|
|
Term
Where is the Parotid gland and what does it secrete? |
|
Definition
| Close to the ear, it has serous secretion |
|
|
Term
| Where is the submandibular gland, and what does it secrete? |
|
Definition
| Under the mandible, it has mixed secretions |
|
|
Term
| Where is the sublingual gland, and what does it secrete? |
|
Definition
| Under the tongue, it has mucus secretions. |
|
|
Term
| Cellular composition of salivary glands: |
|
Definition
- serous acini - serous cells
- mucus acini - pyramidal, mucosa cells w/ serous demilunes cap
- intercalated ducts- drain secretory acini, simple squamous, empty into striated ducts
- striated ducts- columnar, central nuclei
|
|
|
Term
Saliva Secretion:
Stimulate production?
inhibit production? |
|
Definition
Not continuous
Parasympathetic stimulation = watery
sympathetic stimulation = mucus
taste, smell, sight of food = increase produciton
fatigue, fear, dehydration = decrease production
|
|
|
Term
Pancreas:
where is it located?
What kind of gland? |
|
Definition
Lies b/w duodenum and spleen
compound gland w/ 1% endocrine and 99% exocrine |
|
|
Term
Exocrine Pancreas:
Pancreatic duct, what does it secrete?
what stimulates it? |
|
Definition
-intercalated duct that produces pancreatic juice (H2O and bicarb)
-duodenum secretes CCK and acts on acinar cells and Jejunum secretes secretin and acts on centroacinar cells to stimulate secretion of Pancreatic juice
- Vagus secretes Ach to act on acinar to stimulate pancreatic juice |
|
|
Term
| Endocrine Pancreas: what does it contain |
|
Definition
Islets of Langerhans
B cells secrete Insulin
A cells secrete Glucagon
D cells secrete Somatostatin |
|
|
Term
Liver:
Special characteristic
blood supply
Lobule
|
|
Definition
Largest gland in the body
receives blood thru portal v. and hepatic a.
portal triad and central vein |
|
|
Term
| Hepatocyte ultrastructure and function: |
|
Definition
Hexagonal shape w/ 1 nucleus
sinusoidal domain- space of disse (ito cells that store vit A and regenerate liver)
lateral domain- bile canaliculli
drug detox
forms chylomicrons from phospholipids
endocrine- synthesize blood proteins
exocrine- secrete bile |
|
|
Term
|
Definition
caused by congestive heart failure
causes increased central venous pressure
blood becomes stagnant |
|
|
Term
|
Definition
cholesterol and phospholipids
bile salts - aid in digestion/ absorption of lipids
bile pigments- bilirubin from breakdown of RBC
electrolytes |
|
|
Term
|
Definition
1. Hemolytic- rate of RBC destruction > rate of pigment absorption
2. Hepatic- inability of hepatocyte to absorb pigment
3. Obstructive- prevents bilirubin from reaching the intestine |
|
|
Term
|
Definition
stores and concentrates bile
|
|
|
