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Cardiovascular System > Cardiovascular System > Flashcards

Flashcards in Cardiovascular System Deck (13)
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1
Q

What does the term cardiovascular system describe ?

What is this system responsible for?

A

The term cardiovascular system describes the heart along with systemic and pulmonary circulations and is responsible for circulation of blood around the body.

2
Q

What are the two types of autonomic control?

Why are these controls used by the body?

A

The 2 types of control are sympathetic and parasympathetic.

Sympathetic response are used to expend energy more efficiently where as parasympathetic responses are used to preserve energy more efficiently.

3
Q

What is meant by the term cardiac output?

A

Cardiac output is the around of volume pumped by the left ventricle in one minute.

4
Q

What is the meant by the term stroke volume?

A

Stroke volume is the volume of blood ejected from the heart per beat approximately 70ml.

5
Q

What is meant by a inotropic effect on the heart?

A

Inotropic effect means something affecting the strength of contraction this can be positive or negative. Positive has increased strength.

6
Q

What is meant by a chronotropic effect on the heart?

A

Chronotropic described the effect on heart rate a positive effect increases the heart rate.

7
Q

What is meant when the heart is said to be in systole?

A

Heart contracts ejecting blood into aorta and pulmonary artery.

8
Q

What is meant when the heart is said to be in diastole?

A

Diastole is when the heart relaxes allow it to fill with blood from the vena cava and pulmonary vein.

9
Q

What does starlings law demonstrate?

A

Starlings law demonstrates that if a resting muscle is stretched it will contract with greater force thus increasing its workload.

10
Q

What is meant by a hearts preload?

A

A hearts preload is the initial priming tlir is the volume of blood present in the heart after it is filled during diastole.

11
Q

What is meant by a hearts afterload?

A

A hearts afterload describes the volume of blood at the end of contraction (systole) and is determined by resistance encountered when ejecting blood.

12
Q

What receptors does the parasympathetic nervous system work on to exert it effect when controlling the cardiovascular system?

A

The PNS acts on muscarnic receptors 2 and 3 to exert effect.

13
Q

What receptors does the sympathetic nervous system work on to exert it effect when controlling the cardiovascular system?

A

The sympathetic nervous system will act on beta1 and alpha adrenoreceptors.