This set of Human Physiology Multiple Choice Questions & Answers (MCQs) focuses on “Blood Pressure and Cardiac Output”.
1. Which of the following statement is correct?
a) 130/90 mm Hg is considered high and require treatment
b) 100/55 mm Hg is considered an ideal blood pressure
c) 105/50 mm Hg makes one active
d) 190/110 mm Hg may harm vital organs
Explanation: The high blood pressure may harm vital organs of the body. It is the condition in which the force of blood against the artery valve is very high.
2. Blood pressure is the pressure exerted by blood against ___________
b) artery walls
Explanation: Blood pressure exerted by circulating blood on the walls of blood vessels.
3. Blood pressure is measured in terms of ____________
a) mm Hg
c) cm Hg
Explanation: Blood pressure values are generally measured in terms of millimeters of mercury. It is measured using an instrument called as sphygmomanometer.
4. A person can suffer from both low blood pressure and high blood pressure.
Explanation: Low blood pressure is when the systolic and diastolic blood pressure is below for the age of the person. High BP is when blood pressure is high than 120/80 mm Hg.
5. A normal heart rate in an adult at rest is ______________
Explanation: A normal resting heart rate for an adult ranges from 70-85 beats a minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness.
6. Unhealthy growth of tissue due to higher pressures on the walls of the artery is termed as __________
d) aroma and adenoma
Explanation: Atheroma is the growth of tissues due to higher pressure on walls of artery. High pressures increases heart work load.
7. Any mechanism that increases heart rate is said to have a positive ________ effect.
Explanation: Chronotrophic are those that change the heart rate. It changes the heart rate by affecting the electrical conduction system of the heart.
8. The colloid osmotic pressure of blood plasma is due to high concentration of _______
Explanation: Albumin is a family of globular protein. The most important function is maintaining intra vascular colloid osmotic pressure.
9. The sinoatrial node depolarizes more frequently under the influence of ________
a) medulla oblongata
b) vagus nerve
Explanation: Norepinephrine is similar to adrenaline. It is used to treat life threatening low BP that can occur with certain medical conditions.
10. _________ is the enzyme that converts Angiotensinogen to Angiotensin I.
Explanation: Angiotensin is a peptide hormone that causes an increase in blood pressure. Angiotensin I is produced by the action of rennin, which is formed in liver.
Sanfoundry Global Education & Learning Series – Human Anatomy and Physiology.
To practice all areas of Human Anatomy and Physiology, here is complete set of 1000+ Multiple Choice Questions and Answers.