Circulatory System – Chapter 40 Exam

Why do complex multicellular organisms need a circulatory system?

• To keep the heart beating

• Because diffusion alone is too slow

• To absorb light for photosynthesis

• To control skeletal movement

Which is not a basic component of a circulatory system?

• Circulatory fluid

• Pump

• Nerve cells

• Vessels

Which of the following is a characteristic of an open circulatory system?

• Blood flows in enclosed vessels only

• Found in vertebrates

• Uses hemolymph

• High pressure system

Hemolymph is:

• The fluid between cells

• Found in closed circulatory systems

• A mix of blood and interstitial fluid

• Only present in vertebrates

What is the main cavity where hemolymph bathes organs directly?

• Aorta

• Hemocoel

• Vena cava

• Pulmonary loop

Which of the following organisms has a closed circulatory system?

• Insects

• Most mollusks

• Cephalopods

• Crustaceans

Plasma is:

• The solid part of blood

• Found only in open systems

• The fluid part of blood

• Same as interstitial fluid

What are the three main functions of the vertebrate circulatory system?

• Transport, digestion, excretion

• Transport, protection, regulation

• Hormone production, defense, movement

• Movement, breathing, urination

Which blood cells carry oxygen?

• Leukocytes

• Thrombocytes

• Erythrocytes

• Macrophages

White blood cells are called:

• Thrombocytes

• Erythrocytes

• Leukocytes

• Plasma

Tags

NGSS.HS-LS1-4