Questions and Answers
What enzyme initiates the digestion of proteins in the stomach?
Pepsin
Bile is an enzyme involved in the breakdown of lipids.
False
Where is bile made and stored?
Liver and gallbladder
What is the function of microvilli in the small intestine?
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Which of the following describes involuntary actions?
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Which of the following describes voluntary actions?
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Which chemical activates the enzyme pepsin to initiate protein digestion in the stomach?
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Where is bile released to aid in the digestion of lipids?
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Which of the following is NOT a function of the liver in digestion?
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Which part of the nervous system controls actions that are not under intentional control?
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Which of the following is true about microvilli in the small intestine?
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Study Notes
Digestion of Proteins
- Initiated in the stomach through the action of pepsin, an enzyme crucial for protein breakdown.
- Pepsin requires hydrochloric acid for activation, which creates an acidic environment in the stomach.
Bile
- Composed of chemicals that facilitate digestion, particularly essential for lipid breakdown.
- Bile is not classified as an enzyme but plays a vital role in the emulsification of fats.
Liver
- Produces bile, which is stored in the gallbladder until needed for digestion.
- Bile is released into the small intestine to assist in the digestion and absorption of fats.
Microvilli
- Located in the small intestine, microvilli are small projections that increase the surface area for nutrient absorption.
- Vital for efficiently absorbing nutrients into the bloodstream following digestion.
Anatomy & Physiology of the Nervous System
- Involuntary: Functions occur without conscious control; these actions are automatic and essential for survival.
- Voluntary: Actions performed with intentional control, allowing for movement and interaction with the environment.
Digestion of Proteins
- Protein digestion begins in the stomach through the enzyme pepsin.
- Pepsin's activation relies on hydrochloric acid present in the stomach.
Bile
- Bile consists of various chemicals that facilitate digestion, particularly of fats.
- It is not classified as an enzyme but plays a crucial role in lipid breakdown.
Liver
- The liver produces bile and stores it in the gallbladder.
- Bile is released from the gallbladder into the small intestine when needed for digestion.
Microvilli
- Microvilli are tiny projections located in the small intestine that enhance nutrient absorption.
Nervous System Anatomy & Physiology
- Involuntary Nervous Control: Functions occur automatically without conscious intention.
- Voluntary Nervous Control: Movements and actions are performed with conscious thought and intent.
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Description
This quiz covers the key components of the human digestive system, including the role of proteins, bile, liver, and microvilli in nutrient absorption. It will also touch on the basics of the nervous system, distinguishing between voluntary and involuntary actions. Test your knowledge on how these systems interact and function.
