Quiz 3 Human Body, Digestion, and Absorption (Chapter 3)
When empty, the stomach holds about 3/4 cup or 6 ounces. The stomach can expand and hold up to what amount of food or liquid?
1 Gallon
When you consume foods, digestion begins in the mouth where the chewed food encounters this enzyme.
Amylase
This is a tiny unit of matter that cannot be physiologically broken down.
Atom
Cholecystokinin (CCK) signals the gallbladder to contract which in turn causes the release of this substance.
Bile
This substance is produced by the liver, stored by the gall bladder, and emulsifies fat.
Bile
Finger-like projections called villi are lined with microvilli, which greatly increase the absorptive capacity of the small intestine. These are collectively known as what?
Brush Border
This is the smallest unit of life and can grow, reproduce and perform certain basic functions.
Cell
Which of the following best describes the cephalic phase of digestion?
Earliest phase of digestion when the brain signals the body in preparation for food consumption
Which of the following is NOT an accessory organ of digestion that assists the GI tract?
Esophagus
This hormone stimulates secretion of digestive juices by cells in the stomach.
Gastrin
This hormone is produced by the stomach and is considered a physiologic "hunger hormone". Its levels rise the longer you go without food.
Ghrelin
These hormones are secreted by the pancreas to regulate blood glucose levels.
Glucagon and insulin
Hunger is a physiologic drive to eat food, which is triggered by the brain. What region of the brain prompts us to find food?
Hypothalamus
This is a physiological condition that causes you to feel hunger.
Low blood glucose levels
Energy in the form of ATP is produced in this cell organelle called the cell's powerhouse.
Mitochondria
DNA is found in this part of the cell.
Nucleus
This enzyme begins the digestion of protein.
Pepsin
This inactive enzyme is activated by hydrochloric acid in the stomach.
Pepsinogen
This is the main substance found in cell membranes and is composed of two layers.
Phospholipids
Digestion includes both mechanical and chemical processes.
True
