BIO 161 QUIZ 9 QUESTIONS AND
ANSWERS WITH VERIFIED SOLUTIONS
100% CORRECT RATED A+ LATEST
UPDATED 2025
Digestive System
✔✔ Function: Breaks down large food molecules into smaller components that the
bloodstream can absorb and deliver to cells.
✔✔ Structure: Includes the gastrointestinal (GI) tract and several accessory
glands that release digestive secretions.
Mouth
✔✔ The entry point of the digestive system where teeth break down food and the
tongue helps position it and detect taste.
Pharynx
✔✔ Shared passageway for food and air; involved in the swallowing process.
Esophagus
✔✔ A muscular tube that carries food from the pharynx to the stomach through
peristalsis.
Stomach
✔✔ A muscular, J-shaped organ that stores food, secretes gastric juices, starts
protein digestion, and churns food to mix it with enzymes.
,Small Intestine
✔✔ Long, coiled tube where most digestion and nutrient absorption take place;
mixes food with bile and enzymes from the pancreas and intestine.
Colon (Large Intestine)
✔✔ Absorbs water and some nutrients; stores waste until it is ready to be
eliminated.
Cecum
✔✔ A pouch located where the small intestine joins the large intestine.
Rectum
✔✔ End portion of the large intestine that stores feces; stretching signals the need
to defecate.
Anal Canal
✔✔ Controls the release of feces during defecation.
Anus
✔✔ The terminal opening of the digestive tract through which feces are expelled.
Main Components of the Large Intestine
✔✔ Colon, Cecum, Rectum, Anal Canal
Salivary Glands
✔✔ Three pairs of glands that produce saliva, which moistens food and contains
enzymes that begin starch digestion.
,Liver
✔✔ Large organ that produces bile to help digest fats and plays a key role in
nutrient processing and storage.
Gallbladder
✔✔ Small pouch under the liver that stores bile and releases it into the small
intestine when needed.
Pancreas
✔✔ Gland behind the stomach that produces digestive enzymes for all major
nutrients and releases bicarbonate to neutralize stomach acid in the small
intestine.
• Along most of its length, the walls of the Gastrointestinal tract have four layers 1.
________- innermost, moist, mucus-secreting 2. __________- connective tissue
with nerves and blood and lymph vessels 3. __________- double layer of smooth
muscle, except in the stomach, where there are three layers 4. __________-
outermost, epithelial tissue supported by connective tissue - ANSWER✔✔mucosa
submucosa
muscularis
serosa
a mucous membrane that lines the GI tract and secretes mucus that lubricates and
protects the GI tract - ANSWER✔✔mucosa
layer of connective tissue that contains blood vessels, lymph vessels and nerves -
ANSWER✔✔submucosa
, made up of 2 layers of smooth muscle, one circular and one longitudinal -
ANSWER✔✔muscularis
connective tissue covering that secretes a fluid to lubricate the outside of the GI
tract - ANSWER✔✔serosa
• Regions of the GI tract are specialized to _____________- _____________ •
Physical breaking of food into smaller pieces - _____________ • Breaking of
chemical bonds so that complex molecules are broken into smaller subunits -
ANSWER✔✔process food
mechanical digestion
chemical digestion
6 components and organs of the digestive system - ANSWER✔✔mouth
pharynx
esophagus
stomach
small intestine
large intestine
4 accessory glands and organs that aid digestive organs - ANSWER✔✔salivary
glands
pancreas
liver
gallbladder
ANSWERS WITH VERIFIED SOLUTIONS
100% CORRECT RATED A+ LATEST
UPDATED 2025
Digestive System
✔✔ Function: Breaks down large food molecules into smaller components that the
bloodstream can absorb and deliver to cells.
✔✔ Structure: Includes the gastrointestinal (GI) tract and several accessory
glands that release digestive secretions.
Mouth
✔✔ The entry point of the digestive system where teeth break down food and the
tongue helps position it and detect taste.
Pharynx
✔✔ Shared passageway for food and air; involved in the swallowing process.
Esophagus
✔✔ A muscular tube that carries food from the pharynx to the stomach through
peristalsis.
Stomach
✔✔ A muscular, J-shaped organ that stores food, secretes gastric juices, starts
protein digestion, and churns food to mix it with enzymes.
,Small Intestine
✔✔ Long, coiled tube where most digestion and nutrient absorption take place;
mixes food with bile and enzymes from the pancreas and intestine.
Colon (Large Intestine)
✔✔ Absorbs water and some nutrients; stores waste until it is ready to be
eliminated.
Cecum
✔✔ A pouch located where the small intestine joins the large intestine.
Rectum
✔✔ End portion of the large intestine that stores feces; stretching signals the need
to defecate.
Anal Canal
✔✔ Controls the release of feces during defecation.
Anus
✔✔ The terminal opening of the digestive tract through which feces are expelled.
Main Components of the Large Intestine
✔✔ Colon, Cecum, Rectum, Anal Canal
Salivary Glands
✔✔ Three pairs of glands that produce saliva, which moistens food and contains
enzymes that begin starch digestion.
,Liver
✔✔ Large organ that produces bile to help digest fats and plays a key role in
nutrient processing and storage.
Gallbladder
✔✔ Small pouch under the liver that stores bile and releases it into the small
intestine when needed.
Pancreas
✔✔ Gland behind the stomach that produces digestive enzymes for all major
nutrients and releases bicarbonate to neutralize stomach acid in the small
intestine.
• Along most of its length, the walls of the Gastrointestinal tract have four layers 1.
________- innermost, moist, mucus-secreting 2. __________- connective tissue
with nerves and blood and lymph vessels 3. __________- double layer of smooth
muscle, except in the stomach, where there are three layers 4. __________-
outermost, epithelial tissue supported by connective tissue - ANSWER✔✔mucosa
submucosa
muscularis
serosa
a mucous membrane that lines the GI tract and secretes mucus that lubricates and
protects the GI tract - ANSWER✔✔mucosa
layer of connective tissue that contains blood vessels, lymph vessels and nerves -
ANSWER✔✔submucosa
, made up of 2 layers of smooth muscle, one circular and one longitudinal -
ANSWER✔✔muscularis
connective tissue covering that secretes a fluid to lubricate the outside of the GI
tract - ANSWER✔✔serosa
• Regions of the GI tract are specialized to _____________- _____________ •
Physical breaking of food into smaller pieces - _____________ • Breaking of
chemical bonds so that complex molecules are broken into smaller subunits -
ANSWER✔✔process food
mechanical digestion
chemical digestion
6 components and organs of the digestive system - ANSWER✔✔mouth
pharynx
esophagus
stomach
small intestine
large intestine
4 accessory glands and organs that aid digestive organs - ANSWER✔✔salivary
glands
pancreas
liver
gallbladder
