The digestive system

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http://www.bozemanscience.com/digestive-system

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1. In the video, the flesh-fly example is used

to describe how the teeth of flies work

to show that, depending on the species, there may exist many different adaptations to the digestive system

to describe the digestive system of a bulk-feeder

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2. A bulk-feeder is an animal who

digest the food previously to the nutrients absorption

feeds like krill, so the whales do

filters small pieces of food and swallows them

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3. A doughnut is used

to explain why we salivate when we see it

as an example of sources of simple carbohydrates

to explain that our digestive system is very similar to a tube, throughout which the food moves along

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4. In Pavlov´s experiment ..

the dogs didn´t salivate despite hearing the bell

the dogs associated the bell's sound with the presence of food

the dogs stopped salivating after hearing the bell

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5. Saliva contains

Mucus and amylase

Starch and amylase

Starch, muchs and amylase

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6. While we´re swallowing, ...

The epiglotis closes the esophagus

The epiglotis closses the pharynx

The epiglotis closses the larynx

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7. Hydrochloric acid is produced by ...

the parietal cells at the mucose of the stomach

the chief cells at the mucose of the stomach

both by the parietal and the chief cells

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7. Hydrochloric acid is produced by ...

the parietal cells at the mucose of the stomach

the chief cells at the mucose of the stomach

both by the parietal and the chief cells

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8. Proteins digestion

Starts in the mouth and finishes in the duodenum

Starts in the stomach and finishes in the duodenum

Is totally finished at the level of the stomach, thanks to action of the hydrochloric acid

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9. Fats emulsification

Is a process by which fats are broken down

Is a process by which fats are transformed into smaller molecules, in order to ease their digestion

Is a process which is carried out by certain pancreatic enzymes

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10. One of these contains a word that shouldn't be there

Amylase, trypsin, lipase

Trypsin, amylase, pepsin

Chimotrypsin, trypsin, amylase

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11. The absortion of nutrients is posible

thanks to diffussion

thanks to active transport

both of them are correct

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12. In the large intestine

We degrade different monomers to a simpler molecules

We recover most of the water we have used during the digestive process

We eliminate the bacteria which have survived to the digestive processes in the stomach

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13. The appendix

Is a vestigial organ which appears only in certain mammals, like the koalas

Is a vestigial organ thanks to which we can digest the leaves we eat

Is a vestigial organ which could be useful for our ancestors

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14. Vitamins absorption

Takes place at the level of the duodenum

Takes place at the level of the jejunum

Takes place at the level of the colon

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