Save
Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read 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
share
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

BIO202-CH23-Digestiv

BIO202 - Ch 23 - Digestive System - Marieb/Hoehn - RioSalado - AZ

QuestionAnswer
2 main groups of digestive system organs. Alimentary canal & accessory digestive organs.
Alimentary canal GI tract (gut) - continuous, muscular digestive tube that digests & absorbs food.
Organs of alimentary canal Mouth, pharyx, esophagus, stomach, sm. intestine, & lg. intestine.
Organs of accessory digestive organs. Teeth, tongue, gallbladder, salivary glands, liver & pancreas
Name the 6 essential activities of food processing by digestive system. (1) indegestion, (2) propulsion, (3) mechanical digestion, (4) chemical digestion, (5) absorption, (6) defecation
Segmentation Rhythmic local constriction of intestines - mixes food w/digestive juices & increases efficiency of absorption.
When is chemical digestion essentially complete? In the small intestine.
Major absorptive site in digestive system. Small intestine - absorbed through mucosal cells by active/passive transport into blood of lymph.
Digestive activity is provoked by __. a range of mechanical & chemical stimuli
Sensors (__) are located in walls of tract organs. mechanoreceptors & chemoreceptors
Short reflexes are mediates entirely by __. local (enteric) plexuses (gut-brain) in response to GI tract stimuli.
Long reflexes are initiated by stimuli __. involving CNS centers & extrinsic autonomic nerves
Smooth muscle activity inhibited by __. VIP (vasoactive intestinal peptide) or nitric oxide.
All ventral body cavities contain __. serous membranes
peritoneum Serous membrane lining interior of abdominal cavity & covers abdominal organs.
mesentery Peritoneum that extends to digestive organs from body wall & carries blood vessels, lymphatics, nerves & stores fat.
retroperitoneal organs Pancreas & parts of lg. intestine that adhere to dorsal abdominal wall w/o mesentery.
intraperitoneal/peritoneal organs stomach & digestive organs that keep mesentery & remain in peritoneal cavity.
peritonitis Inflammation of peritoneum - leaks stomach juices or burst appendix & feces (bacteria).
What arteries serve digestive organs & hepatic portal circulation? Splanchnic circulation - hepatic, spleen, & L. gastric branches & mesenteric arteries.
4 tunic layers of alimentary canal Mucosa, submucosa, muscularis externa, & serosa.
Mucosa (mucous membrane) Innermost layer, (1) secretes mucus, digestive enzymes, & hormones, (2) absorbs & protects against infectious disease.
Epithelium of mucosa Simple columnar w/goblet cells - diffuse endocrine
Which layer is responsible for segmentation & peristalsis? Muscularis externa
Serosa Outermost layer of intraperitoneal organs - visceral peritoneum - areolar CT w/mesothelium
__ organs have both serosa & adventitia. Retroperitoneal
In-house nerve supply of alimentary canal. Enteric neurons - semi-autonomous
Myenteric nerve plexus supplies? Gi tract wall & controls its motility.
__ nervous system has more neurons than entire spinal cord. enteric
Posterior of oral cavity is the __. oropharynx
Oral mucosa responds to injury by producing __. defensins - antimicrobial peptides
What rises reflexively to close off nasopharynx when we swallow? soft palate
Ankyloglossia "Tongue-tied" - short lingual frenulum
mumps Inflammation of parotid glands (myxovirus).
2 types of secretory cells in salivary glands. Mucous & serous
Serous cells produce? Watery secretion containing enzymes, ions & mucin.
Parotid glands contain only __. serous cells
Saliva is __. hypo-osmotic - 97-99.5% water - pH 6.75 - 7, mucin, lysozyme, & IgA
Lingual lipase Fat-digesting enzyme
Created by: Ladystorm
 

 



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