32 Questions
What is the function of the buccal cavity in the digestive system?
Mechanical and chemical breakdown of food
Which part of the digestive system is responsible for the grinding action during mastication?
Molars
What is the primary function of the parotid salivary gland?
Serous secretion
During digestion, what is the major component found in saliva?
Water
Which part of the GI tract is responsible for the elimination of feces?
Rectum
What is the main function of salivary amylase?
Break down starch into disaccharides
Which nervous system dominates during stress, leading to dryness of the mouth?
Sympathetic nervous system
What is the dual role of the pharynx in the human body?
Respiration and swallowing
Which gland secretes a moderate amount of saliva under parasympathetic stimulation?
Sublingual gland
What is the main function of lingual lipase in saliva?
Break down lipids into fatty acids
Which stage of swallowing is considered involuntary?
Involuntary pharyngeal stage
What is the role of the digestive system in mixing and propulsion?
Propelling food and secretions through the GI tract
Which process involves enzymatically breaking down large nutrients into smaller molecules in the digestive system?
Chemical digestion
What is the main function of mechanical digestion in the digestive system?
Breaking up and churning food
Which GI organ is NOT classified as part of the digestive system's accessory organs?
Esophagus
What is the primary function of absorption in the digestive system?
Absorbing digestive products into the blood and lymph
What enzyme in saliva is responsible for breaking down starch into disaccharides?
Salivary amylase
Which of the following is NOT a function of saliva in the digestive system?
Initiating protein digestion
During dehydration, why do salivary glands stop secreting saliva?
To promote water conservation
Which phase of the digestive process involves the reflex inhibition of mastication muscles and relaxation of the jaw?
Swallowing phase
What is the primary function of lingual lipase in saliva during digestion?
Breaking down triglycerides into fatty acids and diglycerides
Which of the following is a primary function of the parasympathetic nervous system in salivation?
Promoting continuous secretion of a moderate amount of saliva
What is the primary function of the enzyme pepsin in the digestive system?
Breaking down proteins into amino acids
Which part of the digestive system is responsible for the breakdown of starches into maltose?
Salivary amylase
What is the primary function of bile in the digestive system?
Emulsifying fats for better digestion
Which of the following enzymes is responsible for breaking down fats into fatty acids and glycerol in the small intestine?
Lipase
During absorption in the small intestine, nutrients are primarily absorbed into which system?
Circulatory system
What is the main function of lingual lipase in the digestive system?
Initiating the breakdown of lipids in the oral cavity
Which salivary gland secretes both serous and mucus secretions in the mouth?
Submandibular gland
What is the primary function of absorption in the digestive system?
Moving digested products into the bloodstream
During digestion, which component found in saliva is responsible for maintaining a neutral pH environment?
Bicarbonate (HCO3)
What is the primary role of mastication in the digestive process?
Breaking down food into smaller particles
Test your knowledge on the functions of the digestive system including mixing and propulsion, digestion, absorption, and defecation. Identify key components like the buccal cavity, mouth, lips, and palate in the digestive process.
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