HMGT 2460 Quiz 3

Brush Border

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?

1 Gallon

When empty, the stomach holds about 3/4 cup or 6 oz. The stomach can expand and hold up to what amount of food or liquid?

Bile

Cholecystokinin (CCK) signals the gallbladder to contract which in turn causes the release of this substance.

Nucleus

DNA is found in this part of the cell

True

Digestion includes both mechanical and chemical processes.

Mitochondria

Energy in the form of ATP is produced in this cell organelle called the cell's powerhouse.

Hypothalamus

Hunger is a physiologic drive to eat food, which is triggered by the brain. What region of the brain prompts us to find food?

Pepsinogen

The inactive enzyme is activated by hydrochloric acid in the stomach

Glucagon & Insulin

These hormones are secreted by the pancreas to regulate blood glucose levels.

Pepsin

This enzyme begins the digestion of protein

Ghrelin

This hormone is produced by the stomach and is considered a physiologic "hunger hormone". Its levels rise the longer you go without food.

Gastrin

This hormone stimulates secretion of digestive juices by cells in the stomach.

Low blood glucose levels

This is a physiological condition that causes you to feel hunger.

Atom

This is a tiny unit of matter that cannot be physiologically broken down.

Phospholipids

This is the main substance found in cell membranes and is composed of two layers.

Cell

This is the smallest unit of life and can grow, reproduce and perform certain basic functions.

Bile

This substance is produced by the liver, stored by the gallbladder, and emulsifies fat

Amylase

When you consume foods, digestion begins in the mouth where the chewed food encounters this enzyme

Earliest phase of digestion when the brain signals the body in preparation for food consumption

Which of the following best describes the cephalic phase of digestion?

Esophagus

Which of the following is NOT an accessory organ of digestion that assists the GI tract?