answers A+ Grade 2026\2027
Alimentary canal
- correct answer begins in the mouth and ends in the anus
Accessory organs
- correct answer organs that function to assist with the digestive process are the salivary glands, liver,
gallbladder, and pancreas
Four layers of the GI tract
- correct answer mucosa, submucosa, muscle, serosa
Which nervous system controls the alimentary canal
- correct answer Autonomic nervous system
Which nervous system causes increase in digestive activity
- correct answer parasympathetic nervous system
What does the sympathetic nervous system control
- correct answer sphincter muscles and movement within the alimentary canal. This also assists with an
inhibitory effect that provides the ability to remain continent by sphincter control
Sphincter at end of esophagus to stomach
- correct answer LES- Lower esophageal sphincter
Four regions of the stomach
- correct answer Cardia, fundus, body, and pyloric
,Sphincter from stomach to small intestine
- correct answer pyloric sphincter
First section past esophagus in stomach
- correct answer Cardia
Area in stomach where food is stored temporarily
- correct answer Fundus
The main region in the stomach
- correct answer The body
The area of stomach with large muscle that controls emptying into small intestine
- correct answer Pyloric region
What cells secrete pepsinogen?
- correct answer Chief cells of the stomach
What cells secrete hydrochloric acid in stomach?
- correct answer Parietal cells
What mixes to form Pepsin in the stomach?
- correct answer Pepsinogen and hydrochloric acid
How much gastic fluid is produced by the stomach daily?
- correct answer 2-3L
Measurements of small intestines
- correct answer 18-20 feet, 2.5 cm in diameter
Majority of what occurs in small intestines
- correct answer Chemical digestion, nutrient absorption
,sections of small intestine
- correct answer duodenum, jejunum, ileum
What increases surface area of small intestines
- correct answer Intestinal villi
What is the purpose of intestinal villi?
- correct answer increasing surface area to absorb more nutrients
The shortest section of the small intestine.
- correct answer duodenum
The longest section of the small intestines
- correct answer Ileum
Section of small intestine with only receptors for Vit B12 and bile salts
- correct answer Ileum
Junction from small intestine and large intestines
- correct answer Ileocecal valve
Two movements of the small intestines
- correct answer Mixing and propulsive movement
Mixing movement of small intestines
- correct answer Churns food but also slightly propels it
Propulsive movements
- correct answer Primary push of the food through the alimentary canal towards the anus but also
spreads it out for allowing the digestive enzymes to mix with it
Mixing movements
- correct answer Also known as the segmental contractions
, Mixing movements main function
- correct answer To churn the chyme with intestinal enzymes and mechanically break down some
particles
Segmental contractions do what?
- correct answer Enhance the amount of time the chyme is exposed to the villi for absorption
Peristaltic waves
- correct answer Wave-like motions with a movement from the upper to the lower GI system
Large intestines
- correct answer AKA colon; begins at ileocecal valve and ends at anus
measurements of the large intestine
- correct answer Colon is 5-6 ft in length, 2.5-5.5 cm in diameter, largest at the cecum
Functions of the large intestines
- correct answer Fecal material formation, fluid absorption
What makes up fecal waste
- correct answer Bile pigment, mucus, undigested fats, cellulose, protein, desquamated cells,
electrolytes, water, undigested foods
What exists in the colon and not in the small intestine and is responsible for odor of fecal materials
- correct answer bacteria
sections of large intestine in order
- correct answer cecum, ascending colon, transverse colon, descending colon, sigmoid colon, rectum
What makes up gas in body
- correct answer Swallowed air and bacteria in colon