PNB 2265 Digestive System Exam Questions
and Answers All Correct
What is peristalsis? - Answer- primarily produces forward movement
What does peristalsis rely on? - Answer- pressure gradients
What is the process of peristalsis? - Answer- high pressure behind food, low pressure in
front of food
What does contraction and relaxation in peristalsis do? - Answer- contract smooth
muscle to decrease radius behind food, relax to increase radius in front of food
What is proximal contraction? - Answer- contract close to food
What is distal relaxation? - Answer- relax parts further away from food
Where is peristalsis found? - Answer- esophagus, stomach, large intestine, can be
small intestine too
What is an example of peristalsis? - Answer- toothpaste tube
What is segmentation? - Answer- back and forth movements (mixing)
What happens at the same time in segmentation? - Answer- proximal and distal
contractions
What does segmentation mix? - Answer- mix contents of the digestive system with
some secretions (ex enzymes)
Where is segmentation found? - Answer- small intestine
What is the small intestine? - Answer- major site of digestion
What are phasic contractions - Answer- acute (quick) contractions like segmentation
and peristalsis in the GI tract to produce movements
Tonic contractions - Answer- sustained (long) contractions in sphincter muscles that
prevent back flow
, What are sphincter muscles - Answer- keeps acid from coming back up between meals
and keep stomach from sending food to you small intestine before digestion begins
what does GI ingest? - Answer- nutrients
what is excreted in the GI? - Answer- anything that is not absorbed/undigested
what type of processing does the GI do? - Answer- mechanical and chemical
what is an example of a GI function - Answer- secretion and absorption
GI tract is also known as what? - Answer- alimentary canal
GI tract is a? - Answer- long tube
GI tract connects? - Answer- mouth to anus
Sphincter muscles do what in the GI/alimentary canal? - Answer- keep different regions
physically and functionally separated
One directional tube does what? - Answer- allow you to keep adding more nutrients
before fully processing the nutrients from your previous meal
Two way tube system does what? - Answer- require you to finish digesting nutrients
before consuming more (finish digesting breakfast before having lunch)
Do we function off of a one way or two way system? - Answer- one way/one directional
What is an example of something that can trigger a two way digestive system? -
Answer- food poisoning
Problems that occur from having a two way digestive system - Answer- nutrient
deprivation and malnutrition problems
Pathway of GI tract/alimentary system - Answer- mouth, esophagus, stomach, small
intestine, large intestine, rectum
Accessory organs are what? - Answer- where secretions can also come from
Examples of accessory organs - Answer- salivary glands, liver, pancreas, gallbladder
Serous membrane is also known as? - Answer- serosa, peritoneum, wrapp
What is the abdominal cavity? - Answer- where most digestive structures are located
What is the abdominal cavity surrounded by? - Answer- serous membrane
and Answers All Correct
What is peristalsis? - Answer- primarily produces forward movement
What does peristalsis rely on? - Answer- pressure gradients
What is the process of peristalsis? - Answer- high pressure behind food, low pressure in
front of food
What does contraction and relaxation in peristalsis do? - Answer- contract smooth
muscle to decrease radius behind food, relax to increase radius in front of food
What is proximal contraction? - Answer- contract close to food
What is distal relaxation? - Answer- relax parts further away from food
Where is peristalsis found? - Answer- esophagus, stomach, large intestine, can be
small intestine too
What is an example of peristalsis? - Answer- toothpaste tube
What is segmentation? - Answer- back and forth movements (mixing)
What happens at the same time in segmentation? - Answer- proximal and distal
contractions
What does segmentation mix? - Answer- mix contents of the digestive system with
some secretions (ex enzymes)
Where is segmentation found? - Answer- small intestine
What is the small intestine? - Answer- major site of digestion
What are phasic contractions - Answer- acute (quick) contractions like segmentation
and peristalsis in the GI tract to produce movements
Tonic contractions - Answer- sustained (long) contractions in sphincter muscles that
prevent back flow
, What are sphincter muscles - Answer- keeps acid from coming back up between meals
and keep stomach from sending food to you small intestine before digestion begins
what does GI ingest? - Answer- nutrients
what is excreted in the GI? - Answer- anything that is not absorbed/undigested
what type of processing does the GI do? - Answer- mechanical and chemical
what is an example of a GI function - Answer- secretion and absorption
GI tract is also known as what? - Answer- alimentary canal
GI tract is a? - Answer- long tube
GI tract connects? - Answer- mouth to anus
Sphincter muscles do what in the GI/alimentary canal? - Answer- keep different regions
physically and functionally separated
One directional tube does what? - Answer- allow you to keep adding more nutrients
before fully processing the nutrients from your previous meal
Two way tube system does what? - Answer- require you to finish digesting nutrients
before consuming more (finish digesting breakfast before having lunch)
Do we function off of a one way or two way system? - Answer- one way/one directional
What is an example of something that can trigger a two way digestive system? -
Answer- food poisoning
Problems that occur from having a two way digestive system - Answer- nutrient
deprivation and malnutrition problems
Pathway of GI tract/alimentary system - Answer- mouth, esophagus, stomach, small
intestine, large intestine, rectum
Accessory organs are what? - Answer- where secretions can also come from
Examples of accessory organs - Answer- salivary glands, liver, pancreas, gallbladder
Serous membrane is also known as? - Answer- serosa, peritoneum, wrapp
What is the abdominal cavity? - Answer- where most digestive structures are located
What is the abdominal cavity surrounded by? - Answer- serous membrane
