Anatomy Quiz: Muscularis Externa and Blood Vessels

Play an AI-generated podcast conversation about this lesson

Leptin is to satiety as what is to hunger?

Gastrin

Pepsin

Cholecystokinin

Ghrelin (correct)

Which is not a reason the stomach is acidic?

Denatures proteins

Kills microorganisms

Helps break down plant cell walls and connective tissue in meat

Emulsification of lipids (correct)

Which of the following is true regarding digestion and absorption in the stomach?

Lipid digestion begins in the stomach

Digestion is complete after chyme moves out of the stomach (correct)

Carbohydrate digestion begins in the stomach

Small proteins can be absorbed with the help of pepsin

Which of the following is not involved in the regulation of gastric activity?

Hypoglossal nerve Signup and view all the answers

Stimulation of gastric stretch receptors causes all of the following except

A decrease in myenteric plexus stimulation Signup and view all the answers

Which cranial nerves control both intrinsic and extrinsic movements of the tongue?

Hypoglossal Signup and view all the answers

Which salivary gland secretes a mucous-rich fluid that serves as a buffer and lubricant?

Submandibular Signup and view all the answers

What structure holds each tooth in its alveolar socket?

Periodontal ligament Signup and view all the answers

Which muscle is NOT involved in swallowing among the listed options?

Omohyoid Signup and view all the answers

What type of epithelium lines the oropharynx?

Stratified squamous Signup and view all the answers

Which layer in the digestive tract wall directly supports the digestive epithelium?

Muscularis mucosae Signup and view all the answers

Where can a stratified squamous epithelial lining be found?

Anal canal Signup and view all the answers

What feature of the digestive tract wall increases surface area available for absorption?

Rugae Signup and view all the answers

Where are large blood vessels and lymphatics found?

Adventitia Signup and view all the answers

Which layer in the digestive tract wall is sandwiched between circular and longitudinal muscle in the muscularis externa?

Muscularis mucosa Signup and view all the answers

What structure supports all but 25 cm of the small intestine, providing stability and limited movement?

Mesentery Signup and view all the answers

Which layer of the intestinal wall contributes to the mesentery?

Serosa Signup and view all the answers

What is the function of mass movements in the colon?

Propel feces toward the rectum Signup and view all the answers

Which part of the large intestine follows the transverse colon?

Descending colon Signup and view all the answers

What is the primary function of the large intestine?

Reabsorption of water and compaction of feces Signup and view all the answers

What are haustra?

Expansible pouches of the colon Signup and view all the answers

Which part of the digestive tract is approximately the last 15 cm?

Rectum Signup and view all the answers

Which of the following enzymes helps to break down fats in the digestive system?

Lipase Signup and view all the answers

What is the primary function of bile in the digestive process?

To emulsify and aid in the absorption of fats Signup and view all the answers

According to the passage, why do circular muscles contract behind the bolus during swallowing?

To push the bolus forward Signup and view all the answers

Which type of salivary glands produce the glycoproteins called mucins?

Submandibular glands Signup and view all the answers

What is the name of the region of the stomach that connects to the esophagus?

Cardia Signup and view all the answers

Which enzyme is primarily responsible for breaking down proteins in the stomach?

Pepsin Signup and view all the answers