17 Questions
Which part of the gastro-intestinal tract contains three distinct layers of smooth muscle in its walls?
Stomach
Which of the following does NOT contribute to the control/regulation of digestive system?
Somatic nervous system
Which of the following structures is composed of striated skeletal muscle?
Upper third of the esophagus
Which one of the following actions is a VOLUNTARY component of deglutination?
A bolus of food is pressed backward into the pharynx by the tongue
Gastrin, cholecystokinin, secretin and motilin, and glucose-dependent insulinotropic peptide (GIP) are secreted from endocrine cells located in which of the following structures?
Duodenum
When food initially enters and fills the stomach, there is little rise in intra-gastric pressure. This pressure adaptation is due to the presence of:
Rugae within the mucosa of the stomach
What two types of secretory cells are the salivary glands composed of?
Serous cells and mucous cells
What component of saliva aids in preventing tooth decay?
Bicarbonate ions (HCO3-)
The primary role of bicarbonate ions in salivary secretions is to:
Neutralize acids produced by oral bacteria
Which of the following processes contribute to the control/regulation of the digestive system?
All answers
What volume of blood is usually stored in the liver?
450 mL
The narrow tissues spaces between the endothelial cell lining of the sinusoidal capillaries and the hepatocytes are
Space of Disse
Is it true that the majority of the blood supplied to the liver lobule comes from the hepatic artery?
False
Is the blood flow through the liver high despite the low pressure difference because of low resistance to flow?
True
The majority of lymph in the body is made in the liver.
True
What causes the majority of production of bile in the liver?
enterohepatic circulation of bile salts
What vitamin is needed by the liver for the manufacture of most of the coagulation factors?
Vitamin K
This quiz assesses knowledge of the gastro-intestinal tract's structure and composition. Identify the part of the tract with three distinct layers of smooth muscle in its walls.
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