WorksheetsDigestive System and Nutrient Absorption
Total questions: 8
Worksheet time: 4mins
What is the primary reason fecal transplants are used to treat C. diff infections?
To introduce healthy gut microbes to outcompete C. diff.
To directly kill the C. diff bacteria with strong enzymes.
To remove toxins produced by C. diff from the colon.
To stimulate the patient's immune system to fight the infection.
Which three major body systems are primarily responsible for acquiring resources and disposing of waste in vertebrates?
Circulatory, Nervous, and Endocrine systems.
Skeletal, Muscular, and Integumentary systems.
Digestive, Urinary, and Respiratory systems.
Lymphatic, Reproductive, and Immune systems.
How do oxygen and carbon dioxide move between the lungs and the bloodstream during gas exchange?
Through active transport, requiring cellular energy.
By facilitated diffusion, using protein channels.
Via osmosis, driven by water potential differences.
Through passive diffusion, moving from high to low concentration.
What is the primary function of a bird's gizzard in digestion?
To absorb nutrients from digested food.
To chemically break down food using enzymes.
To mechanically grind food with swallowed rocks.
To store undigested food before excretion.
Which of the following statements accurately describes the digestive system of a platypus?
Platypuses possess a specialized gizzard for grinding food.
Platypuses have teeth and a stomach, similar to most mammals.
Food in platypuses is ground by plates in their jaws and passes directly from the throat to the intestines.
Platypuses primarily digest food in a large, multi-chambered stomach.
What is the primary difference between diffusion and active transport in the context of nutrient absorption?
Diffusion requires energy, while active transport does not.
Active transport moves molecules from an area of lower concentration to higher concentration, requiring energy.
Diffusion only occurs in the lungs, whereas active transport occurs throughout the digestive tract.
Active transport is a passive process, while diffusion is an active process.
Where does the majority of nutrient absorption occur in the human digestive system?
The stomach, due to its highly acidic environment.
The large intestine, where water is primarily absorbed.
The small intestine, which has a large surface area due to folds and villi.
The liver, where nutrients are processed and stored.
What is peristalsis, and why is it crucial for digestion?
It is the chemical breakdown of food by enzymes, essential for nutrient absorption.
It is the process of absorbing water and electrolytes in the large intestine, preventing dehydration.
It is the muscular contractions that propel food through the digestive tract, even against gravity.
It is the detoxification process carried out by the liver, removing harmful substances from the bloodstream.
