WSU CARLOYE BIO 106 EXAM 3 Questions And Solutions
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Course
WSU CARLOYE BIO 106
Institution
WSU CARLOYE BIO 106
WSU CARLOYE BIO 106 EXAM 3 Questions
And Solutions
Label the parts of the digestive system. - answer -
What happens to ingested food during ingestion? - answer -The act of feeding or
eating. This is done by chewing, drinking, and swallowing which begins the
digestion process. Amylase from y...
WSU CARLOYE BIO 106 EXAM 3 Questions
And Solutions
Label the parts of the digestive system. - answer -
What happens to ingested food during ingestion? - answer -The act of feeding or
eating. This is done by chewing, drinking, and swallowing which begins the
digestion process. Amylase from your saliva begins to hydrolyze starch and
glycogen. After being turned into a bolus, the food moves from the oral cavity to
the pharynx, (throat) and the esophagus (connected to the stomach) and finally to
the stomach.
What enzymes are involved? - answer -Amylase from saliva
What name is given to the chewed up food? - answer -The mix of food and saliva
is called a bolus (shapes into a ball by chewing and tongue movement)
What aspects of digestion occur in the stomach? - answer -Chemical digestion
(HCl) denaturizes proteins in food. Proteases (protein digesting enzyme) called
pepsin helps to breakdown the peptide bonds exposed by HCl.
What chemicals make up the gastric juice? - answer -HCl (pH of 2 (acidic enough
to dissolve nails)) and a protease called pepsin (enzyme)
How does the body prevent the gastric juice from digesting the stomach itself? -
answer -The ingredients of gastric juice are inactive until they are released into the
lumen (cavity) of the stomach.
What is the mix of food and digestive juice called? - answer -The mix of food and
gastric juice is called chime. Chyme is the semifluid mass of partly digested food
, that is expelled by the stomach into the duodenum and moves through the
intestines during digestion.
Describe the dynamics of digestion in the stomach. - answer -Chemical digestion
by gastric juice is caused by the churning action of the stomach. Muscle
contractions and relaxations mix the stomach every 20 seconds. This and
enzymatic activity creates chyme. Both ends of the stomach are usually
sphinctered.
Name the two parts of the small intestine - answer -Duodenum and the jejunum
are two parts of the small intestine. The ileum connects to the colon (large
intestine)
Which organs contribute digestive juices to the small intestine? - answer -The
pancreas, liver, and gallbladder, as well as gland cells from the intestinal wall itself
contribute digestive juices to the small intestine.
What chemicals make up the digestive juices? - answer -Pancreas produces an
alkaline solution with bicarbonate, and enzymes (trypsin and chymotrypsin). The
liver produces bile which is stored and concentrated in the gallbladder.
Describe each step of the digestive process, where it occurs, and how it contributes
to the process of digesting food and extracting nutrients. - answer -Chemical
digestion by gastric juice is caused by the churning action of the stomach. Muscle
contractions and relaxations mix the stomach every 20 seconds. This and
enzymatic activity creates chyme. Both ends of the stomach are usually
sphinctered.
Why are "essential amino acids" called "essential"? - answer -they are amino acids
that must be obtained from in prefabricated form and are therefore called essential
amino acids. They're 8 essential amino acids
What is Chemical energy used for? - answer -Chemical energy is used for cellular
processes, produces ATP
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