Interstitial fluid resembles plasma in the same distribution of:
1. Formed elements
2. Proteins
3. Minerals
4. Enzymes
All terrestrial vertebrates possess:
1. A muscle or elastic membrane to increase thoracic volume
2. A renal portal system
3. A skin that does allow diffusion of gases
4. At least a three chambered heart
What separates the right and the left atria in the human heart?
1. | A thin muscular wall | 2. | A thick muscular wall |
3. | A thin fibrous membrane | 4. | A thick fibrous membrane |
A tricuspid valve will prevent flow of blood from:
1. Right atrium to right ventricle
2. Right ventricle to right atrium
3. Left atrium to left ventricle
4. Left ventricle to left atrium
Purkinje fibers are:
1. | Intrinsic neural fibers in the ventricles |
2. | Muscle fibers that interconnect SA node and AV node |
3. | Muscle fibers that are distributed in the ventricular musculature |
4. | Neural fibers that spread the impulse throughout the ventricular muscle mass |
All the following statements regarding joint diastole phase of the cardiac cycle are correct except:
1. | All chambers are in a relaxed state |
2. | The AV valves may remain closed in the initial period |
3. | Ventricles get filled in the later part |
4. | Semilunar valves remain open |
The first heart sound is heard during the:
1. Beginning of ventricular systole
2. End of ventricular systole
3. Beginning of atrial systole
4. End of ventricular diastole
When the stroke volume of the ventricles is much less than the expected values, the heart is said to be:
1. Fibrillating
2. Blocked
3. Arrested
4. Failing
A trained athlete can achieve a maximal cardiac output of:
1. | 5 – 10 L/min | 2. | 15 – 20 L/min |
3. | 25 – 30 L/min | 4. | 55 – 60 L/min |
The atria receive:
1. | Oxygenated blood | 2. | Deoxygenated blood |
3. | Mixed blood | 4. | Venous blood |