CMA Knowledge 3 — Questions and Answers
Question 1: Which type of muscle tissue is found in the walls of hollow organs such as the intestines?
- Cardiac muscle
- Skeletal muscle
- Smooth muscle (Correct answer)
- Striated muscle
Correct answer: Smooth muscle
Smooth (visceral) muscle is involuntary and found in the walls of hollow organs like the intestines, bladder, and blood vessels.
Question 2: What is the function of hemoglobin in red blood cells?
- Clot blood at wound sites
- Transport oxygen throughout the body (Correct answer)
- Destroy pathogens
- Produce antibodies
Correct answer: Transport oxygen throughout the body
Hemoglobin is an iron-containing protein in red blood cells that binds and transports oxygen from the lungs to body tissues.
Question 3: Which vitamin is produced by the skin upon exposure to sunlight?
- Vitamin A
- Vitamin B12
- Vitamin C
- Vitamin D (Correct answer)
Correct answer: Vitamin D
The skin synthesizes Vitamin D when exposed to ultraviolet B (UVB) radiation from sunlight.
Question 4: A patient's chart lists 'Dx: DM Type 2.' What condition does this abbreviation represent?
- Dyslexia
- Dermatomyositis
- Diabetes mellitus type 2 (Correct answer)
- Diaphragmatic muscle type 2
Correct answer: Diabetes mellitus type 2
DM Type 2 stands for Diabetes Mellitus Type 2, a metabolic disorder characterized by insulin resistance.
Question 5: What is the primary purpose of the lymphatic system?
- Digest nutrients from food
- Filter blood and return interstitial fluid to circulation (Correct answer)
- Regulate hormone levels
- Contract skeletal muscles
Correct answer: Filter blood and return interstitial fluid to circulation
The lymphatic system collects excess interstitial fluid, filters it through lymph nodes, and returns it to the bloodstream.
Question 6: Which of the following is a diarthrosis (freely movable) joint?
- Sutures of the skull
- Pubic symphysis
- Shoulder joint (Correct answer)
- Epiphyseal plate
Correct answer: Shoulder joint
The shoulder (glenohumeral) joint is a synovial joint classified as diarthrosis because it allows a wide range of free movement.
Question 7: Which blood type is considered the universal donor for red blood cells?
- Type A positive
- Type AB negative
- Type O negative (Correct answer)
- Type B positive
Correct answer: Type O negative
Type O negative blood lacks A, B, and Rh antigens, making it safe to transfuse to patients of any blood type in emergencies.
CMA Knowledge 3
Which type of muscle tissue is found in the walls of hollow organs such as the intestines?