Ch 11c: Cardiovascular System: Heart Flashcards
(47 cards)
What changes if either or both SV and HR is changed?
CO
CO is affected by factors leading to _________________ or _________________
Regulation of stroke volume
Regulation of Heart Rate
What does SV stand for?
Stroke Volume
What’s EDV?
End diastole Volume
(volume right before systole)
What’s ESV?
End Systolic Volume
(Volume right before diastolic)
What’s the equation for Stroke Volume?
SV = EDV - ESV
What’s affected by length of ventricular diastole and venous pressure?
EDV
What’s affected by arterial BP and force of ventricular contraction?
ESV
What are the 3 main factors that affect SV?
Preload
Contractility
Afterload
What’s Preload?
EDV; Load that’s started with
What’s Contractility?
Increased efficiency
(thus moving to a new curve)
What’s Afterload?
Force we are pumping against
What’s Hypertension?
High Blood Pressure
What carries blood away from the heart and to the body?
Arteries and Arterioles
What exchanges vessels and connects Arterioles & Venules?
Capillaries
What carries blood from the body to the heart?
Venules and Veins
What Tunica is this:
- Endothelium
- Loose connective tissue
Tunica Intima
What Tunica is this:
- Smooth muscle (thicker)
- Elastic fibers
Tunica Media
What Tunica is this:
- Collagen fibers
Tunica Externa
What only has endothelial cells?
Capillary
What is vesoconstriction?
Diameter decreases
What is vesodilate?
Diameter Increases
What are capillary beds?
Interwoven network of capillaries
Where do capillary beds drain into?
Postcapillary Venule