Which layer of the wall of the alimentary canal contracts to move materials through the canal?

The muscularis in the small intestine is made up of a double layer of smooth muscle: an inner circular layer and an outer longitudinal layer. The contractions of these layers promote mechanical digestion, expose more of the food to digestive chemicals, and move the food along the canal.

1. Which of the following layers of the alimentary canal wall has blood vessels that carry nutrients away?
2. Which of the following uses peristalsis to push food to the stomach?
3. What is the palate's main function?
4. Which of the following causes the stomach to rise up through the diaphragm?
5. Which of the following layers of the alimentary canal is associated with?
6. Which layer of the alimentary canal wall is the visceral peritoneum?
7. Is the layer of the alimentary canal wall that absorbs nutrients?
8. Which type of movement is produced in alimentary canal by muscular contraction?
9. Which of the following catalyzes carbohydrates in the mouth?
10. Which digestive organ's only function is propulsion?
11. What structure in the oral cavity directs materials downward to the pharynx?
12. Which layer of the esophagus is damaged by the acid in gastric juices?
13. What enzyme is released into the oral cavity?

Which of the following layers of the alimentary canal wall has blood vessels that carry nutrients away?

Lamina propria—In addition to loose connective tissue, the lamina propria contains numerous blood and lymphatic vessels that transport nutrients absorbed through the alimentary canal to other parts of the body.

Which of the following uses peristalsis to push food to the stomach?

Esophagus. After you swallow, peristalsis pushes the food down your esophagus into your stomach.

What is the palate's main function?

The function of the soft palate is to facilitate speech, breathing and swallowing by making sure that the proper communication channels between the oral, pharyngeal and nasal cavities are open or closed during each of these processes.

Which of the following causes the stomach to rise up through the diaphragm?

Type I hernias, or sliding hiatal hernias, are the smallest and most common variety. These hernias cause your stomach to slide through a small opening in the diaphragm, and up into your chest.

Which of the following layers of the alimentary canal is associated with?

Mucosa forms the lining of the alimentary canal.

Which layer of the alimentary canal wall is the visceral peritoneum?

Adventia layer (or serosa)

Outermost layer of loose connective tissue - covered by the visceral peritoneum. Contains blood vessels, lymphatics and nerves.

Is the layer of the alimentary canal wall that absorbs nutrients?

The mucosa, composed of simple epithelium cells, is the innermost layer of the gastrointestinal (GI) tract. It is the absorptive and secretory layer of the GI tract.

Which type of movement is produced in alimentary canal by muscular contraction?

Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract.

Which of the following catalyzes carbohydrates in the mouth?

The digestion of carbohydrates begins in the mouth. The salivary enzyme amylase begins the breakdown of food starches into maltose, a disaccharide.

Which digestive organ's only function is propulsion?

Food leaves the mouth when the tongue and pharyngeal muscles propel it into the esophagus. This act of swallowing, the last voluntary act until defecation, is an example of propulsion, which refers to the movement of food through the digestive tract.

What structure in the oral cavity directs materials downward to the pharynx?

1. The Epiglottis Directs Swallowed Foodstuffs Down the Esophagus. The respiratory and digestive systems share structures in the back of the oral cavity that connect with both the trachea (of the respiratory system) and the esophagus (of the digestive system).

Which layer of the esophagus is damaged by the acid in gastric juices?

Healthy esophageal epithelium provides an effective barrier between refluxed gastric acid and esophageal nociceptors; but this barrier is vulnerable to attack and damage, particularly by acidic gastric contents.

What enzyme is released into the oral cavity?

Salivary amylase: Carbohydrate digestion also initiates in the mouth. Amylase, produced by the salivary glands, breaks complex carbohydrates, mainly cooked starch, to smaller chains, or even simple sugars. It is sometimes referred to as ptyalin.