quiz 3

Avery is studying biology and wants to know what the cells are called that help fight infections in the body. Can you help Avery?

• Red blood cells

• Platelets

• White blood cells

• Veins

Answer explanation

The cells that help fight infections in the body are called white blood cells. Unlike red blood cells, which carry oxygen, white blood cells are crucial for the immune response.

Sophia is learning about the human body in her biology class. Her teacher asks, which type of blood vessel carries blood away from the heart?

• Veins

• Arteries

• Capillaries

• Vessels

Answer explanation

Arteries are the blood vessels that carry blood away from the heart to the rest of the body. In contrast, veins carry blood back to the heart, and capillaries are small vessels where the exchange of substances occurs.

During a biology class, Priya accidentally cuts her finger. What is the main function of platelets in her blood?

• Carry oxygen

• Fight infections

• Help in clotting

• Transport nutrients

Answer explanation

The main function of platelets is to help in clotting. When Priya cuts her finger, platelets gather at the injury site to form a clot, preventing excessive bleeding and aiding in the healing process.

During a biology class, Ava asked, "What is the term for the system that circulates blood throughout the body?"

• Respiratory System

• Digestive System

• Circulatory System

• Nervous System

Answer explanation

The system that circulates blood throughout the body is called the Circulatory System. It is responsible for transporting oxygen, nutrients, and waste products, unlike the other systems listed.

During a biology class, Abigail learned about different types of blood cells. Which type of blood cells are responsible for carrying oxygen?

• White blood cells

• Platelets

• Red blood cells

• Plasma

Answer explanation

Red blood cells are responsible for carrying oxygen throughout the body. They contain hemoglobin, which binds to oxygen, making them essential for oxygen transport, unlike white blood cells, platelets, or plasma.

During a biology class, Rohan learned about the term for the flow of blood through the body. What is it?

• Blood stream

• Blood vessels

• Blood flow

• Blood path

Answer explanation

The correct term for the flow of blood through the body is 'blood stream.' This term specifically refers to the continuous movement of blood within the circulatory system, distinguishing it from other related terms.

During a science experiment, Avery accidentally cuts her finger. What happens when blood vessels are damaged and blood leaks out?

• Clotting

• Bleeding

• Circulation

• Pumping

Answer explanation

When blood vessels are damaged, blood leaks out, which is referred to as bleeding. This is the body's immediate response to injury, while clotting is a subsequent process that helps stop the bleeding.

During a biology class, Priya asked, 'What is the function of veins in the circulatory system?'

• Carry blood to the heart

• Carry blood away from the heart

• Exchange gases

• Filter blood

Answer explanation

Veins are responsible for carrying blood back to the heart. This is crucial for maintaining circulation, as they collect deoxygenated blood from the body and return it to the heart for reoxygenation.

Lily fell off her bike and noticed a small injury that caused discoloration of her skin. What is this injury called?

• Cut

• Bruise

• Scratch

• Swelling

Answer explanation

Lily's injury caused skin discoloration, which is characteristic of a bruise. A bruise occurs when small blood vessels break under the skin, leading to a purple or blue mark, distinguishing it from cuts or scratches.

Ava is learning about the human body. What is the role of the heart in the circulatory system?

• Filters blood

• Pumps blood

• Stores blood

• Cleans blood

Answer explanation

The heart's primary role in the circulatory system is to pump blood throughout the body, delivering oxygen and nutrients to tissues and organs. This makes 'Pumps blood' the correct answer.