CNA Anatomy and Physiology Basics — Questions and Answers
Question 1: Which organ system is responsible for pumping blood throughout the body?
- Respiratory system
- Digestive system
- Cardiovascular system (Correct answer)
- Musculoskeletal system
Correct answer: Cardiovascular system
The cardiovascular system, which includes the heart and blood vessels, is responsible for pumping and circulating blood throughout the body.
Question 2: What is the largest organ of the human body?
- Liver
- Skin (Correct answer)
- Lungs
- Brain
Correct answer: Skin
The skin is the largest organ of the human body. It acts as a protective barrier, regulates body temperature, and provides sensory information.
Question 3: How many chambers does the human heart have?
- Two
- Three
- Four (Correct answer)
- Six
Correct answer: Four
The human heart has four chambers: the right atrium, right ventricle, left atrium, and left ventricle. These chambers work together to pump oxygenated and deoxygenated blood.
Question 4: Which part of the brain controls breathing and heart rate?
- Cerebrum
- Cerebellum
- Brain stem (Correct answer)
- Frontal lobe
Correct answer: Brain stem
The brain stem controls vital automatic functions such as breathing, heart rate, and blood pressure. It connects the brain to the spinal cord.
Question 5: What is the primary function of the kidneys?
- Produce insulin
- Filter waste from the blood and produce urine (Correct answer)
- Regulate hormone production
- Absorb nutrients from food
Correct answer: Filter waste from the blood and produce urine
The kidneys filter waste products and excess fluids from the blood, which are then excreted as urine. They also help regulate blood pressure and electrolyte balance.
Question 6: Which type of muscle tissue is found in the walls of hollow organs such as the stomach?
- Cardiac muscle
- Skeletal muscle
- Smooth muscle (Correct answer)
- Striated muscle
Correct answer: Smooth muscle
Smooth muscle is found in the walls of hollow organs like the stomach, intestines, and blood vessels. It contracts involuntarily to move substances through the body.
CNA Anatomy and Physiology Basics
Which organ system is responsible for pumping blood throughout the body?