Obtaining Energy and Removing waste

Front

Removal of waste products in the body is called ________________.

Back

excretion

Answer explanation

The removal of waste products from the body is known as excretion. This process is essential for maintaining homeostasis and involves organs like the kidneys and liver, which filter and eliminate waste.

Front

Which type of digestion breaks down pieces of food into small molecules?

Back

chemical digestion

Answer explanation

Chemical digestion is the process that breaks down food into small molecules through enzymatic reactions, allowing nutrients to be absorbed. In contrast, mechanical digestion involves physical breakdown, and peristalsis is a movement, not a digestion type.

Front

What is the function of peristalsis?

Back

to move food through the digestive system

Answer explanation

Peristalsis is the wave-like muscle contractions that move food through the digestive system, ensuring it progresses from the esophagus to the stomach and intestines for further processing.

Front

Does an activity like sleeping require energy?

Back

No, it requires energy.

Answer explanation

Sleeping does require energy for bodily functions like brain activity and maintaining homeostasis, making the statement false.

Front

Absorption in the small intestine occurs through the walls of fingerlike projections called

Back

villi

Answer explanation

Absorption in the small intestines occurs through the walls of villi, which are fingerlike projections that increase the surface area for nutrient absorption. The other options do not relate to this function.

Front

Most chemical digestion and nutrient absorption occurs in the small intestine.

Back

False

Answer explanation

False. Most chemical digestion and nutrient absorption occur in the small intestine, not the large intestine, which primarily absorbs water and electrolytes.

Front

Do plants produce water vapor as a waste product?

Back

True

Answer explanation

True. During photosynthesis, plants take in carbon dioxide and release oxygen, but they also lose water vapor through a process called transpiration, making water vapor a waste product.

Front

The esophagus is a tube that connects the

Back

mouth to the stomach

Answer explanation

The esophagus is a muscular tube that connects the mouth to the stomach, allowing food to pass through after swallowing. Therefore, the correct answer is 'mouth to the stomach'.

Front

What are the steps of the digestive system in order starting with food entering the mouth?

Back

Food enters the MOUTH, goes down the ESOPHAGUS, enters the STOMACH, enters the SMALL INTESTINE, enters the LARGE INTESTINE, waste is removed from the body.

Answer explanation

The correct order of the digestive system is: food enters the MOUTH, goes down the ESOPHAGUS, enters the STOMACH, then the SMALL INTESTINE, followed by the LARGE INTESTINE, and finally, waste is removed from the body.

Front

What is the process called where food is ground into smaller pieces by the teeth?

Back

Mechanical Digestion

Answer explanation

The process where food is ground into smaller pieces by the teeth is called Mechanical Digestion. This physical breakdown of food is essential for easier digestion and absorption of nutrients.