Human Body Systems and Functions

Which structures work as a group to form tissues?

• cells

• organs

• organisms

• body systems

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What do the digestive and circulatory systems have in common?

• They work together to give the body the ability to speak, smell, and breathe.

• They work together to give cells the nutrients to produce energy.

• They work together to reduce waste to keep the body clean.

• They work together to pump blood throughout the body.

How do the digestive and circulatory systems differ in how they help the body obtain nutrients?

• The digestive system breaks down food for nutrient absorption, while the circulatory system transports these nutrients to the body's cells.
• The digestive system and circulatory system both break down food into smaller particles for absorption.
• The circulatory system absorbs nutrients from food, while the digestive system distributes them throughout the body.
• The digestive system transports nutrients directly to cells, while the circulatory system breaks down food.

Which choice explains how running as a type of exercise can improve some major systems in the human body?

• Running primarily strengthens the digestive system.
• Running has no impact on the body's systems.
• Running only benefits mental health without physical effects.
• Running enhances cardiovascular, respiratory, and muscular systems in the body.

Which is an example of an inherited trait?

• Weight
• language

• Eye color
• favorite food

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Jeremy is visiting a zoo and notices that the zebras are herding together in their habitat. Jeremy wonders why the zebras, even the babies, do this. Which question would most likely help him understand this behavior?

• Is it instinctual for zebras to herd together?

• Is there a limit on how many zebras can herd together?

• How many characteristics do the zebras in the herd share?

• How many zebras in the herd have similar color patterns?

Alyssa is in the sixth grade. She and her mom share the same hair and eye color. They are planning a trip to Mexico. Alyssa's mom can speak Spanish, but Alyssa cannot. Why is Alyssa unable to speak Spanish?

• Alyssa's mom inherited the ability to speak Spanish, but Alyssa did not.

• Alyssa only inherited the ability to speak English from her mom.

• Alyssa cannot learn to speak Spanish because she is too young.

• Alyssa's mom learned to speak Spanish, but Alyssa did not.

A student has two hamsters that are brothers. One hamster is named Arnold and the other is named Chester. Arnold gets a lot of exercise because the student puts Arnold in a cage with a hamster wheel. Chester does not exercise as much as Arnold because the student puts Chester in a different cage without a hamster wheel. After one month, the student notices that Arnold can run much faster than Chester. Which choice best summarizes the student's observations?

• Arnold inherited the ability to run faster by exercising.

• Arnold acquired the ability to run faster by exercising.

• Chester inherited the ability to run faster by exercising.

• Chester acquired the ability to run faster by exercising.

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Why do some animals, like birds, migrate during certain seasons?

• To escape predators in their original habitat.

• To avoid other species in their habitat.

• To find new habitats for nesting.

• To find food and favorable living conditions.

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Which of the following is an example of a learned behavior in animals?

• Birds building nests.

• Dogs sitting on command.

• Fish swimming in schools.

• Cats purring when content.