Lecture 11 and 12 Flashcards
Which of the following events is NOT associated with isovolumetric contraction of the ventricles?
A. Ventricular pressure increases rapidly
B. A ‘T wave’ can be observed using ECG
C. A “lubb” sound can be heard with a stethoscope
D. The ventricle is depolarized
B
How does the internal radius of a vessel affect the resistance
An increase in radius will reduce resistance.
What is vasodilation?
The widening of your blood vessels.
What is vasoconstriction?
The narrowing of blood vessels. When vasoconstriction occurs, the blood flow to some of your body’s tissues becomes restricted.
Which of the following statements is incorrect?
A. Gap junctions contain pores with a low resistance to ionic current
B. Gap junctions to help myocytes to work as a functional syncytium
C. Gap junctions allow current to flow between electrical cells
D. Gap junctions prevent cross-bridge formation between actin and myosin.
D
In order, the vessels that branch off the aortic arch are…
The Brachiocephalic trunk, left common carotid artery, left subclavian artery
Which blood vessel receives blood from the great saphenous vein?
The femoral vein
When lying down, venous blood is ____
Uniform
In an upright position, venous volume below the heart _____, whereas venous volume above the heart ______
Increases, decreases
Starlings law of the heart
The more stretched muscle fibres are before a contraction, the stronger the contraction will be
