Digestion

summarizing the defecation reflex you might include all of the following except

involuntary relaxation of the external anal sphincter allows defecation to occur

accurately describe gastric juice accept

it initiates chemical digestion of food

During swallowing, the epiglottis prevents choking by folding down to close off the ____ and ____ .

Larynx and Trachae

Bile is produced in the ____ and stored in the ____ .

Liver , Gallbladder

Where does food enter the stomach?

cardiac sphincter

Chyme passes from the ___ of the small intestine through the ileocecal valve into the ___ .

ileum, colon

Which of the following statements accurately distinguishes a bolus from chyme?

A bolus is food that has been chewed and swallowed, whereas chyme is the mixture of food and digestive secretions created in the stomach.

What best describes how the structures of the oral cavity work?

Once food enters the oral cavity, the teeth chew it and saliva partially digests it. During swallowing, the bolus is moved into the esophagus by the epiglottis, which folds down to block the trachae

Which of the following describes the longest portion of the alimentary canal?

The small intestine is where absorption of nutrients occurs.

the taenia coli are bands of ____ running along the outside of the colon

muscle

summarize the last few steps of the digestive process

nutrients are absorbed in the small intestine. Water is absorbed in the large intestine. Waste is eliminated through the rectum and anal canal.

Which of the following best describes the papillae on the tongue

papillae are raised projections on the tongue's surface. Circumvallate papillae create friction that helps the tongue move food.

the muscles that move the mandible during mastication are the

temporalis, superficial and deep masseters, medial and lateral pterygoids

how would you explain peristalsis to someone who needed help understanding how it works

the alimentary canal is a continuous tube. the walls of the tube include layers of smooth muscle. the rhythmic contraction and relaxation of the smooth muscle is called peristalsis

If explaining the stomach regions to a friend you might say all of the following except?

the cardia, cardiac region connects the stomach to the duodenum

which of the following is a good description of the function of the stomach sphincters

the cardiac sphincter is where a bolus enters the stomach from the esophagus. the pyloric sphincter is where chyme exits the stomach into the duodenum

Best explanation of the structure of the colon?

the cecum leads into the colon, which begins with the ascending colong, followed by the transverse colon, the descending colon and then the sigmoid colon

Is a similarity between the circular folds and the villi?

they both increase the surface area availble for absorption