VTNE PREP COMBINED, AAVSB Practice Tests| 744 QUESTIONS| WITH COMPLETE SOLUTIONS| 132 PAGES

The pressure in the systemic arteries during ventricular contraction is: (a) Diastolic blood pressure (b) Osmotic pressure (c) Systolic blood pressure (d) Low pressure Correct Answer: (c) Systolic blood pressure In what order does the impulse for depolarization travel through the heart? (a) AV node, SA node, bundle of His, Purkinje fibers (b) SA node, AV node, bundle of His, Purkinje fibers (c) SA node, AV node, Purkinje fibers, bundle of His (d) AV node, SA node, Purkinje fibers, bundle of His Correct Answer: (b) SA node, AV node, bundle of His, Purkinje fibers The muscular sphincter located between the stomach and the duodenum is the: (a) Pylorus (b) Cardia (c) Chyme (d) Rugae Correct Answer: (a) Pylorus When a stimulus is strong enough to cause complete depolarization, it has reached: (a) Threshold (b) Repolarization (c) Refractory period (d) Action potential Correct Answer: (a) Threshold Smooth muscles can be found in the: (a) Heart (b) Stomach (c) Pelvic limb (d) Diaphragm Correct Answer: (b) Stomach On inspiration, the pressure in the thoracic cavity, as compared with ambient air pressure, is (a) Negative (b) Positive (c) Same as the ambient air pressure (d) Fluctuating Correct Answer: (a) Negative