1
BIOS256: Exam 1 Review Questions
and Answers (100% Correct
Answers) Already Graded A+
Alimentary canal (Digestive tract) Ans: the continuous
muscular tube that includes the mouth, pharynx, esophagus,
© 2026 Assignment
stomach, small intestine, and large intestine, and functions to
digest and absorb food (food passes through them!).
Guru01 - Stuvia
Accessory digestive organs Ans: They are the teeth, tongue,
Expert
and salivary glands located in the mouth, and the gallbladder,
liver, and pancreas, connected to the alimentary canal by a
series of ducts. They aid in mechanical breakdown and
produce specialized secretions to aid the digestion of food.
Digestive Tract Ans: It acts as a disassembly line to break
down nutrients into forms that the body can use and absorb so
they can be distributed to the tissues.
Ingestion Ans: Selective intake of food
Digestion Ans: mechanical and chemical breakdown of food
into a form usable by the body
Absorption Ans: uptake of nutrient molecules into the
epithelial cells of the digestive tract
and then into the blood and lymph
Compaction Ans: absorbing water and consolidating the
indigestible residue into feces
, 2
Defecation Ans: Eliminates indigestible substances via the
anus (elimination of feces).
Mechanical digestion Ans: Physical breakdown of food into
smaller pieces. Exposes more food surface to digestive
enzymes.
Chemical digestion Ans: a series of hydrolysis reactions that
breaks dietary macromolecules into their monomers
© 2026 Assignment
visceral peritoneum; parietal peritoneum Ans: The
______________ covers the external surfaces of most of the
digestive organs, and the ______________________ lines the body
Guru01 - Stuvia
wall of the abdominopelvic cavity.
Expert
Peritoneal cavity Ans: It is located between the visceral and
parietal peritoneum and is filled with serous fluid.
Mesentery Ans: a double layer of peritoneum that extends to
the digestive organs from the body wall: It allows blood
vessels, lymphatics, and nerves to reach the digestive organs;
holds the organs in place; and stores fat.
Retroperitoneal organs Ans: are found posterior to the
mesentery, lying against the dorsal abdominal wall.
Mucosa Ans: the innermost, moist, epithelial membrane that
lines the entire digestive tract, provides secretions to the GI
lumen, absorbs digestive end products, and protects against
infectious disease.
Submucosa Ans: a moderately dense connective tissue layer
containing blood and lymphatic vessels, lymphoid follicles,
and nerve fibers.
BIOS256: Exam 1 Review Questions
and Answers (100% Correct
Answers) Already Graded A+
Alimentary canal (Digestive tract) Ans: the continuous
muscular tube that includes the mouth, pharynx, esophagus,
© 2026 Assignment
stomach, small intestine, and large intestine, and functions to
digest and absorb food (food passes through them!).
Guru01 - Stuvia
Accessory digestive organs Ans: They are the teeth, tongue,
Expert
and salivary glands located in the mouth, and the gallbladder,
liver, and pancreas, connected to the alimentary canal by a
series of ducts. They aid in mechanical breakdown and
produce specialized secretions to aid the digestion of food.
Digestive Tract Ans: It acts as a disassembly line to break
down nutrients into forms that the body can use and absorb so
they can be distributed to the tissues.
Ingestion Ans: Selective intake of food
Digestion Ans: mechanical and chemical breakdown of food
into a form usable by the body
Absorption Ans: uptake of nutrient molecules into the
epithelial cells of the digestive tract
and then into the blood and lymph
Compaction Ans: absorbing water and consolidating the
indigestible residue into feces
, 2
Defecation Ans: Eliminates indigestible substances via the
anus (elimination of feces).
Mechanical digestion Ans: Physical breakdown of food into
smaller pieces. Exposes more food surface to digestive
enzymes.
Chemical digestion Ans: a series of hydrolysis reactions that
breaks dietary macromolecules into their monomers
© 2026 Assignment
visceral peritoneum; parietal peritoneum Ans: The
______________ covers the external surfaces of most of the
digestive organs, and the ______________________ lines the body
Guru01 - Stuvia
wall of the abdominopelvic cavity.
Expert
Peritoneal cavity Ans: It is located between the visceral and
parietal peritoneum and is filled with serous fluid.
Mesentery Ans: a double layer of peritoneum that extends to
the digestive organs from the body wall: It allows blood
vessels, lymphatics, and nerves to reach the digestive organs;
holds the organs in place; and stores fat.
Retroperitoneal organs Ans: are found posterior to the
mesentery, lying against the dorsal abdominal wall.
Mucosa Ans: the innermost, moist, epithelial membrane that
lines the entire digestive tract, provides secretions to the GI
lumen, absorbs digestive end products, and protects against
infectious disease.
Submucosa Ans: a moderately dense connective tissue layer
containing blood and lymphatic vessels, lymphoid follicles,
and nerve fibers.
