Digestive System Chapter 25 Practice Flashcards

A comprehensive set of fill-in-the-blank flashcards based on the Chapter 25 digestive system lecture, covering anatomy, physiology, and histology.

The stage of digestion where nutritional substances pass into the bloodstream is __________.

Absorption

The digestive tract (alimentary canal) is a muscular tube approximately __________ long.

$$30\,ft$$

The layer of the digestive tract containing the inner circular and outer longitudinal layers is the __________.

Muscularis externa

In most of the digestive tract, the mucosa is lined with __________ epithelium.

Simple columnar

The __________ plexus is located in the submucosa and controls glandular secretions.

Submucosal

The __________ plexus is found between the two layers of the muscularis externa and controls peristalsis.

Myenteric

The __________ extends from the greater curvature of the stomach and covers the small intestine like an apron.

Greater omentum

An adult has __________ total teeth.

$$32$$

Glands produce between __________ and __________ liters of saliva each day.

$1.0$; $1.5$

The __________ salivary glands produce a serous (watery) secretion containing salivary amylase.

Parotid

The liquid reaches the stomach in $1$ to $2$ seconds, while a food bolus takes __________ to __________ seconds.

$4$; $8$

The __________ sphincter regulates the passage of chyme into the duodenum.

Pyloric

Gastric juice can have a pH as low as __________.

$$0.8$$

The only indispensable function of the stomach is the secretion of __________, which is essential for vitamin B12 absorption.

intrinsic factor

The __________ ligament separates the left and right lobes of the liver.

Falciform

Primary bile pigment is called __________, which comes from hemoglobin decomposition.

Bilirubin

Excess bile or fat maldigestion can cause stool to appear __________.

yellow

The pancreas secretes between __________ and __________ mL of pancreatic juice per day.

$1,200$; $1,500$

The __________ is the first section of the small intestine and is about $10$ inches long.

duodenum

The __________ are finger-like projections in the small intestine covered with absorptive cells and goblet cells.

Villi

The pouches in the colon formed by the taenia coli are called __________.

Haustra

The movement in the small intestine characterized by stationary ring-like constrictions is known as __________.

Segmentation

The internal anal sphincter is composed of __________ muscle, while the external anal sphincter is __________ muscle.

smooth; skeletal

A deficiency in intrinsic factor leads to a condition called __________.

pernicious anemia

The process of the liver producing glucose from non-carbohydrate sources is called __________.

gluconeogenesis