CSA #2 Life

Which of the following is not a function of the digestive system?

• Breaking down food into smaller molecules

• Absorbing nutrients into the bloodstream

• Producing red blood cells

• Eliminating waste from the body

Which body system is responsible for producing new red blood cells?

• skeletal

• circulatory

• respiratory

• endocrine

Which of the following best demonstrates the interaction between the circulatory and respiratory systems?

• The heart pumps blood throughout the body

• Oxygen is absorbed into the bloodstream in the lungs

• Nutrients are absorbed into the blood from the intestines

• The brain sends signals to regulate breathing

Which system in the body is responsible for defending against diseases?

• Digestive

• Immune

• Respiratory

• Circulatory

These two body systems collaborate to enable a person to walk, lift objects, and perform physical activities.

• nervous and respiratory

• circulatory and lymphatic

• skeletal and muscular

• urinary and digestive

Which body system is responsible for transporting oxygen and nutrients to cells and removing waste products?

• circulatory system

• digestive system

• nervous system

• respiratory system

Which body system is primarily responsible for transporting nutrients and oxygen to cells?

• circulatory system

• digestive system

• respiratory system

• urinary system

Which of the following is not a characteristic of viruses?

• They can be treated with antibiotics

• They require a host to replicate

• They can be prevented by vaccines

• They are smaller than bacteria

Identify the microorganism that can be beneficial or harmful and is found on human skin.

• Protozoa

• Fungi

• Bacteria

• Viruses

Why are viruses not considered living organisms by scientists?

• They cannot carry out metabolic processes on their own

• They are too small to be seen without a microscope

• They always cause diseases in their hosts

• They lack a cellular structure