CCMA Anatomy and Physiology Basics 1 — Questions and Answers
Question 1: Which organ system is responsible for regulating body temperature, sensation, and serving as a barrier against infection?
- Skeletal system
- Integumentary system (Correct answer)
- Lymphatic system
- Endocrine system
Correct answer: Integumentary system
The integumentary system (skin, hair, nails, glands) is the body's first line of defense and regulates temperature through sweat and blood vessel dilation.
Question 2: The SA (sinoatrial) node is responsible for which cardiac function?
- Pumping blood to the lungs
- Initiating the electrical impulse that sets the heart rate (Correct answer)
- Preventing backflow between chambers
- Regulating blood pressure
Correct answer: Initiating the electrical impulse that sets the heart rate
The SA node, located in the right atrium, is the heart's natural pacemaker and generates the electrical impulse that initiates each heartbeat.
Question 3: Which plane divides the body into right and left halves?
- Transverse plane
- Frontal (coronal) plane
- Sagittal plane (Correct answer)
- Oblique plane
Correct answer: Sagittal plane
The sagittal plane divides the body into right and left sections; the midsagittal plane divides it into equal halves.
Question 4: What is the name of the large muscle responsible for breathing that separates the thoracic and abdominal cavities?
- Intercostal muscle
- Diaphragm (Correct answer)
- Pectoralis major
- Transverse abdominis
Correct answer: Diaphragm
The diaphragm contracts and flattens during inhalation, increasing thoracic volume and drawing air into the lungs.
Question 5: The medical term for the front surface of the body is:
- Posterior
- Lateral
- Anterior (Correct answer)
- Inferior
Correct answer: Anterior
Anterior (also called ventral) refers to the front-facing surface of the body.
Question 6: Which blood vessel carries oxygenated blood from the lungs to the heart?
- Pulmonary artery
- Pulmonary vein (Correct answer)
- Aorta
- Superior vena cava
Correct answer: Pulmonary vein
Pulmonary veins are unique among veins in that they carry oxygenated blood from the lungs back to the left atrium of the heart.
CCMA Anatomy and Physiology Basics 1
Which organ system is responsible for regulating body temperature, sensation, and serving as a barrier against infection?