Question

A. Which capillaries allow passage of medium to large molecules? continous, fenestrated, or sinusoidal?

B. Greater stretch of the ventricular muscle would occur due to larger preload? afterload? or stroke volume?

Answer 1

A. Continuous capillaries allow passage of ions and water through them

Fenestrated capillaries allow passage of larger molecules.

Sinusoidal capillaries allow passage of proteins as well as cells.

So, sinusoidal capillaries allow the flow of the medium to large sized molecules.

b. Preload is stretch of the heart muscles before contraction.

Afterload is a stretch of the heart after contraction.

So, preload will lead to more stretch of the ventricular muscle.