The cardiac valve protecting the right atrioventricular orifice: ?
Show answer Hide answer
Answer: B. Tricusped valve
Explanation
The tricuspid valve features three distinct cusps guarding the right atrioventricular orifice. This cardiac valve prevents the backflow of blood into the right atrium during ventricular contraction. Proper closure ensures efficient unidirectional blood flow toward the lungs for oxygenation. Heart valves are fibrous tissue flaps that open and close in response to pressure changes. The right atrium receives deoxygenated blood before passing it through the tricuspid valve. Chordae tendineae anchor the valve cusps to papillary muscles preventing them from inverting.
Cardiologists listen for abnormal heart murmurs using a stethoscope to detect valve leaks. Valvular heart disease can impair circulation and force the heart to work much harder. Echocardiograms provide detailed moving images of heart valves opening and closing in real time. Bicuspid valve is an alternative name for the mitral valve located on the left side. Mitral valve protects the left atrioventricular orifice between the left atrium and ventricle. Option four is incorrect because only the tricuspid valve guards the right orifice.
- Subject
- Physical Education
- Category
- Physical Education
- Topic
- —
- Difficulty
- medium
Related questions
Q1. Poor dietary practices fail to trigger:________?
Show answer Hide answer
Answer: D. AIDS
AIDS is caused by the Human Immunodeficiency Virus and is not triggered by poor diet. Viral transmission occurs through contact with specific infected bodily fluids. Dietary practices influence general health but cannot...
Q2. Natural dietary sources of Vitamin A include_____________?
Show answer Hide answer
Answer: A. Green vegetables
Green leafy vegetables contain carotenoids that serve as important natural dietary sources of Vitamin A. Beta-carotene found in plant foods is converted by the human body into active retinol. Including pigmented vegetabl...
Q3. Alternative nomenclature for Vitamin B1:_______?
Show answer Hide answer
Answer: B. Thiamine
Thiamine is the recognized alternative chemical nomenclature for Vitamin B1. This essential water-soluble vitamin plays a key role in energy metabolism. It helps convert carbohydrates into usable cellular energy througho...
Q4. The specific vitamin vital for hemostasis and clotting:___________?
Show answer Hide answer
Answer: C. Vitamin K
Vitamin K is essential for the hepatic synthesis of several blood clotting factors. Without adequate Vitamin K, the body cannot form normal blood clots to stop bleeding. This vitamin acts as an indispensable enzymatic co...
Q5. The discovery of Vitamin A was credited to_____________?
Show answer Hide answer
Answer: B. William Morgan
Vitamin A was famously isolated and researched by scientists including Elmer McCollum, making William Morgan incorrect.
Q6. Primary fuel sources driving all human activities :?
Show answer Hide answer
Answer: A. Carbs
Carbohydrates serve as the primary and most readily available fuel source for driving human activities. Muscles preferentially metabolize carbohydrate stores during both endurance and high-intensity physical exertion. Ra...