6 Questions
What is the definition of shock in medical terms?
Inadequate tissue perfusion and insufficient disposal of cellular waste products
Which statement correctly describes the role of the heart in maintaining adequate tissue perfusion?
The heart acts as a pump to maintain adequate blood volume and sufficient blood pressure throughout the entire circulatory system.
In a healthy adult, what is the average normal heart rate?
60 to 90 beats per minute
What is the normal stroke volume of the heart in a healthy adult per heartbeat?
70ml
What is the mean pressure in big arteries of a normal healthy adult?
95mmHg
What is the mean pressure in arterioles of a normal healthy adult?
35mmHg
Study Notes
Shock
- Shock is a life-threatening condition characterized by inadequate tissue perfusion and insufficient disposal of cellular waste products.
Physiology of Circulation
- Three factors are responsible for maintaining adequate tissue perfusion:
-
The Heart:
- Acts as a pump to maintain adequate blood volume at sufficient blood pressure throughout the circulatory system.
- Normal heart rate: 60-90 beats per minute in a healthy adult.
- Normal stroke volume: approximately 70ml per heartbeat.
- Heart rate and stroke volume correlate with blood volume and systolic blood pressure of 120mmHg.
-
Blood Pressure in a Healthy Adult:
- Mean pressure in big arteries: 95mmHg.
- Mean pressure in arterioles: 35mmHg.
Learn about the factors that maintain adequate tissue perfusion, including the heart's role in circulation and blood pressure. Understand the physiology of shock, a life-threatening condition.
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