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Biology > Bio Quiz 6 > Flashcards

Bio Quiz 6 Flashcards

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1
Q

Stomach

A

Is a “J” shaped tube that lies below the diaphragm and partially behind the liver in the upper abdominal cavity. The inner mucosa layer is folded into structures known as rugae. The mucosa also contains gastric pits. The PH of the contents of the stomach is between 2-3.

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2
Q

Rugae

A

Folds in the inner lining of the stomach that increase surface area for CD and AB

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3
Q

Gastric Pits

A

These pits produce and secrete gastric juices that aid in CD

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4
Q

Muscularis of the stomach

A

Composed of 3 layers of smooth muscle (out to in)-
Longitudinal muscle
Circular muscle
Oblique Muscle

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5
Q

Functions of the stomach

A

Stores and mixes chyme
CD of proteins and it begins fat digestion
MD through peristalsis and churning
AB of water, alcohol, and drugs

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6
Q

Chyme

A

A soupy liquid mixture of small food particles, mixed with gastric juices

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7
Q

Sphincter

A

These are valves composed of smooth muscle and therefore they are under involuntary control

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8
Q

Cardiac Sphincter

A

Controls the passage of bolus from the esophagus into the stomach. It also prevents the back flow of the contents of the stomach into the esophagus

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9
Q

Pyloric Sphincter

A

Controls the passage of chyme from the stomach into the duodenum. Also it prevents the back flow of materials from the duodenum to the stomach

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10
Q

4 Regions of the stomach

A

Fundus
Cardiac region
Body
Pyloric Region

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11
Q

Cardiac region

A

Where bolus enters the stomach. May increase in size and swell for storage

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12
Q

Fundus

A

Is found above cardiac sphincter and it is for storage overflow. It may contain swallowed air.

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13
Q

Body

A

Large central portion of the stomach that secretes gastric juices containing; pepsinogen, gastric lipase, renin, and HCL.

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14
Q

Pyloric Region

A

The narrow region leading to the duodenum that secretes gastric juices containing; pepsinogen, gastric lipase, renin, and gastrin

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15
Q

Serosa

A

Outter covering composed of connective tissue. Flexible, but easy to puncture.

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16
Q

Muscularis

A

It is composed of 3 layers of smooth muscle that function in peristalsis and churning-
LM
CM
OM

17
Q

Submucosa

A

Composed of connective tissue containing blood vessels, nerves, and lymphatic vessels. The blood vessels will transport the absorbed water, alcohol, and drugs away from the stomach.

18
Q

Muscularis mucosa

A

Very thin layer of thin muscle that allows the mucosa above to have independent motion which aids with churning

19
Q

Mucosa

A

Inner lining of the stomach that is folded into rugae and contains gastric pits.

Biology (6 decks)

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