Week 8: Digestive Flashcards
What is ingestion?
taking some food or some drink and putting it in your mouth
-adding complicated molecules
What is digestion?
taking those large complicated molecules that you ingested and breaking them down into smaller and simpler pieces (catabolism)
what is mechanical processing (aka motility)
Ingest this stuff from the point of ingestion, we have to be able to move it through digestive system so we can do all the things to it that we need to do
What do we also use motility for?
Physically break large molecules into smaller ones
Why would we want to break larger things into smaller things?
- if youre gonna have to break stuff down and use chemicals on it, you want as much surface area of ingested surface material as you can get
- So they can be used at the cellular level
what is secretion?
- Taking enzymes and juices from the various digestive organs and putting them in right place and time for coordination process of digestion
- Secreting right hormones at right time to get the right effect
What is absorption?
Moving something across an epithelium
Since the mouth and anus is open to the outside world, what does this mean for everything in the tube in the digestive tract?
it is also open to the outside world
How to get something inside body rather than open to the outside world?
it has to get absorbed through the epithelium and moved out of the tube that is connected to the outside world (absorption)
all of these tubes like every other surface in your body is lined with what?
epithelium
the only material that you can get out of your body is ?
stuff you haven’t absorbed yet
The inside of your esophagus, what is outside of the body?
the lumen
The lumen of your stomach is ___ your body but when you absorb through the ____, now its inside.
outside; epithelium
everything that we absorb but isn’t lipid, it will be absorbed by what and moved into?
an epithelial cell and moved into the blood
where are the lipids going?
into the lymphatic system
not just cholesterol and fats are going into the lymphatic system, what else goes?
fat soluble vitamins
which subclavian vein does it get delivered to?
left subclavian vein
what is elimination?
we cant absorb everything we digest and we cant digest everything we ingest, because there are some things we dont have the right enzymes to digest. because of that, we have material in the digestive system that is not gonna provide a fuel for your body that we need to get rid of so theres room for what we can digest.
what does elimination ultimately lead to?
defecation
What is regulation?
control of the first 6 previous processes
how is oral cavity important to digestive system?
mandatory part of the digestive system in a healthy person, the entrance.
how is esophagus important?
how we’re transporting what we have ingested to the stomach
what is the stomach involved in?
pretty serious digestion using chemicals and in physically breaking food into smaller parts
how is the rectum and anus important?
the exit end of digestive tract