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25 Cards in this Set

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In the context of saliva, serous refers to ___ liquid and mucous refers to ___ liquid

watery, thick

In a day we produce ___ of saliva

1L

What are the 6 functions of saliva?

Taste, Digestion, Cleansing Action, Lubrication, Swallowing, Protection

Pharynx

connects the mouth and nasal passage way

What structure allows us taste?

Papilae on the top of tongue are stimulated only when in solution; To taste substances, they must be in solution

____ digestion starts in the mouth

Sugar

___ ____ is capable of breaking down double sugars, complex sugars and starches into simple sugars

Salivary amylase

3 types of sugar Simple sugars that are absorbed in the small intestine

Simple sugars, Double sugars i.e. sucrose (table sugar = glucose + fructose bonded together), Complex sugar or starch (many simple sugars bonded together)

____ is a type of mucous in saliva that lubricates food making it easier to swallow; as well as it helps form the bolus.

Mucin

Describe the Case Study GI Tract Dilemma

Nicole, (32, 5'6, 10-20lbs over ideal weight) went to gastroenterologist to complain about heart burn, belching, stomach paid, nausea and weight loss.

Describe Nicole's lifestyle

She smoked 1/2 pack of cigarettes a day, drank 2-4 alcoholic drinks per week, followed a moderately healthy diet, and exercised occasionally

Esophagogastroduodenoscopy (EGD)

camera is placed down the throat and into the stomach to take pictures of the area from the esophagus to the duodenum (where stomach and small intestine meet)

Barium swallow (upper gastrointestinal series)

patient swallow barium (liquid chemical) which lines the digestive tract with a chalky coating. Barium is illuminated on X-rays

Purpose of digestion

hydrolyze (break down using water) macromolecules that can't cross the plasma membrane into subunit molecules (amino acids, monosaccharides, fatty acid and glycerol)

What is the difference between ingestion and digestion?

Ingestion occurs when the mouth takes in food, digestion involves the breakdown of larger pieces of food into smaller pieces that can be acted on by digestive enzymes

Accessory Organs

Salivary glands, liver, gallbladder, pancreas

Digestive Tract Organs

Mouth, Pharynx, Esophagus, Stomach, Small Intestine, Large Intestine, Rectum, Anus

Salivary Glands

secrete saliva which contains digestive enzyme for carbohydrates

Liver

largest organ inside the body, processes and store nutrients, produces bile for emulsification of fats

Gallbladder

stores bile from liver, sends it to the small intestine.

Some properties of saliva include... (2pts)

Substances in saliva act as a buffer which neutralize both acids and bases, Saliva has a bactericidal effect on many organism

The wave-like movement that propels food and digestive juices along the digestive tract is called ___, it is caused by the contraction of ___

Peristalsis, smooth & circular muscles

The sphincters (circular muscles) found along the digestive tract controlthe ___ and ____

direction, rate of movement of products through the tract

The esophagus is ___ in length, food takes ___s to travel across it, and it has no ____

25cm in length, 10s, No digestive function

What structure allows food boluses to pass through and

Food boluspasses through the gastroesophageal sphincter at the end of the esophagusGastroesophagealsphincter is lined to prevent regurgitationDesigned toprevent regurgitation of stomach contents back into the esophagus