-
- author "me"
- tags ""
- description ""
- fileName "Digestion"
- freezingBlueDBID -1.0
- What is large intestine for
- To remove water
-
Why is digestion of large food molecules essential
Because monomers are whats used
-
Why are enzymes used in digestion
To catalyze reactions at lower temperatures
-
What are the main parts of the alimentary canal
Mouth, tongue, oral cavity, phayrnx, esophagus, stomach, small intestine, large intestine, rectum, and anus
-
What are the digestive glands
Salivary glands, pancreas, and liver
-
What is peristalsis
Rythmic waves of contraction of smooth muscles in the walls of the digestive tract and move food through the alimentary canal
-
What does the pyrloric sphincter does
Regulates the passage of food out of the stomach and into the small intestine
-
What does saliva contain
- Glycoprotien proctects soft lining and lubricates
- Buffers to neutralize food and prevent tooth decay
- Antibacterial agents
- Salivary amylase
-
What types of digestion begin the the oral cavity
Mechanical and chemical
-
What four kinds of teeth do you have
Incisors, canines, premolars, molars
-
What does salivary amylase initiate in chemical digestion
Starch
-
What does the tongue do
- Taste
- Manipulates food and helps shape it into a ball called a bolus
-
What is the trachea
The windpipe
-
What prevents food from going down the wrong pipe
The epiglottis tips down over the opening to the trachea during swallowing
-
What is the larynx
Voice box
-
What is the epiglottis
Flap of cartilage and fibrous connective tissue over the trachea opening
-
What happens after the bolus enters the esophagus
The larynx moves down epiglottis up
-
What does the esophageal spinctor do
Controls the esophageal opening
-
What is the esophagus
Muscular tube the conveys food boluses from pharynx to the stomach
-
What is the pharynx
Pathway from mouth to windpipe and esophagus
-
What does the stomach do
Stores food and breaks it down with acid and enzymes
-
What is gastric juice made up of
Mucus, enzymes and strong acids
-
What is the function of gastric juice
Break apart cells in food and kill most bacteria and other microbes
-
What do the interior stomach walls look like
Highly folded with pits leading down to the tubular gastric glands
-
What three types of cells do the gastric glands have
- Mucus cells
- Parietal cells
- Chief cells
-
What do the three types of gastric gland cells secriete
The different conponents of the gastric juice
-
What do the mucous cells do
Secrete mucous which lubricates and proctects the cells lining the stomach
-
What do the parietal cells do
Secrete hydrocloric acid
-
What do the chief cells do
Secrete pepsinogen, an inactive form of the enzyme pepsin
-
How does pepsinogen , hci, and pepsin interact in the stomach
- 1. Pepsinogen and hci are secreted into the lumen (cavity) of the stomach
- 2. The hci converts pepsinogen to pepsin
- 3. Pepsin the activates more pepsinogen starting a chain reaction
-
What does pepsin begin
The chemical digestion of protiens its splits the polypeptides chains into smaller polypeptides
-
What prevents gastric juice from digesting away the stomach lining
|
|
