Crash Course A&P #33-35 Digestive System

Crash Course A&P #33-35 Digestive System

Watch the clips and answer the questions!

Multiple Choice

We eat any kind of food for two reasons:

1. To obtain the ___ we need to stay alive.

2. To get the raw materials required for building all of our ___.

• energy; tissues

• energy; organs

• molecules; atoms

Multiple Choice

Both you and food have energy stored in the ___ between atoms.

• bonds

• molecules

• oxygen

Multiple Choice

We measure the energy stored in the chemical bonds in food in ___.

• calories

• molecules

• bonds

• joules

Multiple Choice

Your cells work best with materials that are in their most ___ form.

• basic

• complex

Multiple Choice

Enzymes are ___ that living things use as catalysts to speed up reactions.

• proteins

• carbohydrates

• lipids

• nucleic acids

Multiple Choice

The simple idea behind your digestive system is to break down the polymers of macromolecules in your food into ___ that your cells use to build their own polymers.

• monomers

• molecules

• energy

• stomach

Multiple Choice

The alimentary canal (the gastrointestinal tract) contains the hollow organs that run from your ___ to your anus.

• stomach

• mouth

• lungs

• heart

Multiple Choice

The inside of your gastrointestinal tract is technically outside your body.

• true

• false

Multiple Choice

The inner GI tract is lined with ___ which lubricates and protects it from being digested by its own enzymes.

• columnar epithelial cells

• enzymes

• mucus

• sqaumous cells

Multiple Choice

The first process of digestion is eating, or ___. This process is both mechanical and chemical.

• ingestion

• digestion

• excretion

• propulsion

Multiple Choice

The second step is propulsion, which is started by swallowing but is continued on via the involuntary muscle movement ___.

• swallowing

• peristalsis

• chewing

• digestion

Multiple Choice

All of this pushing results in step 3, ___ digestion. The goal of this is to increase the surface area of the food, making it easier for step 4.

• mechanical

• chemical

• psycological

Multiple Choice

step 4, ___digestion to break the food down further.

• chemical

• mechanical

• psycological

Multiple Choice

Step 5, ___, occurs in the small intestine and involves the absorption of the nutrients into your blood stream.

• absorption

• chemical breakdown

• defecation

Multiple Choice

Once your body has sucked out all the nutrients it wants, the leftovers are escorted out of your body via step 6, ___.

• defecation

• chewing

• chemical breakdown

Multiple Choice

Most of these steps require ___ among multiple organs

• cooperation

• disorganization

Multiple Choice

Digestion starts in your ___.

• mouth

• stomach

• intestines

• liver

Multiple Choice

The mushy ball created as you chew is called a ______

• bolus

• food ball

• pallet

• teeth

Multiple Choice

The esophagus carries the bolus from the pharynx to the ____

• esophagus

• epiglottis

• lungs

• liver

Multiple Choice

Your stomach is capable of holding 2-4 liters of material and is lined with ___ muscles which allow it to mush that material up.

• smooth

• cardiac

• skeletal

Multiple Choice

The inner lining of the stomach is lined with gastric pits which secrete hydrochloric acid, which when combined with pepsinogen creates ___, which can destroy pretty much anything it encounters.

• hydrochloric acid

• carbonic acid

• pepsin

• ammonia

Multiple Choice

Stomach secretion occurs in three phases based on where the food is sensed. The cephalic phase is ruled by your ___. It kicks in when you see, smell, taste, or even think about food. This only works if you want to eat the food in question.

• brain

• stomach

• intestines

Multiple Choice

Once the food hits your stomach, it starts the ___ phase.

• cephalic

• gastric

• intestinal

Multiple Choice

The third phase, the ___phase, speeds or slows the rate at which your stomach empties.

• cephalic

• gastric

• intestinal

Multiple Choice

The stomach doesn’t really absorb too much. It pulverizes the food, but it also feels out the food and decides whether to keep it or purge it (which is called ___).

• vomiting

• eating

• masticating

• pooping

Multiple Choice

The “urge to purge” can also be influenced by ___ or stress.

• trauma

• illness

• happiness

Multiple Choice

A lactose intolerant person ___ still consume dairy. The side effects, though, include gas, bloating, and diarrhea.

• can

• cannot

Multiple Choice

While the stomach isn’t the best at ___ digesting and absorbing much of anything, it has the small intestine to take care of those things.

• chemically

• mechanically

Multiple Choice

The small intestine is called small because it is about ___ the diameter of the large intestine. The hold thing is covered in tiny hair-like villi, which are also covered with tinier microvilli.

• one quarter

• half

• three quarters

Multiple Choice

The duodenum is the “business end” of the small intestine. It is where the chyme from the stomach enters as well as ___ from the liver and gallbladder, and enzymes from the pancreas.

• bile

• acid

• milk

• water

Multiple Choice

Enzymes are ___ and proteins are expensive.

• proteins

• carbohydrates

• lipids

• nucleic acids

Multiple Choice

The large intestine’s main functions are to absorb any remaining ___ and store the rest of the material until it’s ready to leave the body.

• minerals

• water

• bile

• fats

Multiple Choice

Those of us without the enzyme lactase leaving the digestion of dairy products to the bacteria that reside in the ___ intestine, who have enzymes of their own, including lactase.

• small

• large

Multiple Choice

The opening of the external anal sphincter is a/an ___ action.

• INVOLUNTARY

• VOLUNTARY