physiology week13 activity

Watch the following video to see the structure of the liver and how this structure supports the functions of the liver, including the processing of nutrients, toxins, and wastes. At rest, about 1500 mL of blood per minute flow through the liver. What percentage of this blood flow comes from the hepatic portal system?

80

_____ is the passage of substances through the intestinal mucosa into the blood or lymph.

Absorption

The ejection of bile from the gallbladder is controlled by which hormones?

CCK and secretin

Watch the following animation to see how swallowing is a complex process that involves the nervous system to coordinate the actions of upper respiratory and digestive activities. During which stage of swallowing is there a risk of food entering respiratory pathways?

Oropharyngeal

The act of expelling feces is called

defecation

Stimulation of gastric juice secretion occurs in all of the following phases except the _____ phase.

digestive

Chemical digestion requires the secretion of _____ into the lumen of the GI tract.

digestive enzymes and bile

Because fats are insoluble in water, they must be

emulsified

Fats and other nutrients in the duodenum stimulate the intestinal mucosa to release a hormone called

gastric inhibitory peptide.

The chemical process in which a compound unites with water and then splits into simpler compounds is called

hydrolysis

The process of deglutition includes all of the following except the _____ stage.

laryngeal

Pepsinogen is converted to pepsin by hydrochloric acid, which is produced by the _____ of the gastric glands.

parietal cells

The wave-like ripple of the muscle layer of the GI tract is called

peristalsis

Saliva contains the enzyme

amylase

CCK is an intestinal hormone that

causes the pancreas to increase secretion of exocrine high in enzymatic content. opposes the influence of gastrin on gastric parietal cells. stimulates contraction of the gallbladder so that bile can pass into the duodenum. Correct! all of the above

Peristalsis is regulated in part by the intrinsic stretch reflexes. It is also thought to be stimulated by the hormone

cholecystokinin (CCK)

The final step in lipid transport by the intestines is the formation of

chylomicrons