Quiz Transport & Biodiversity L2 2022

Atrial systole occurs after ____ (a) has sent excitation to atria.

Blood is forced into ventricles through open ____ (b) valves.

Ventricular ____ (c) occurs after AV node has sent excitation to ventricles when they are filled with blood.

AV valves close producing ___ (d) sound and blood is forced out of heart.

_____ (e) occurs, heart muscles relaxes

Semilunar valves close to prevent back flow producing ____ (f) sound. Blood flows into the heart from outside filling atria then ventricle.

What happen during P wave?

• Depolarisation of atria

• Contraction of atria

• Depolarisation of ventricles

• Contraction of ventricle

What happen during QRS complex?

• Depolarisation of atria

• Contraction of atria

• Depolarisation of ventricles

• Contraction of ventricle

The duration of cardiac cycle is

• 0.6 s

• 0.8 s

• 0.6 min

• 0.8 min

Which of this hypothesis explains the process of translocation from sugar source to sugar sink?

• Cytoplasmic streaming hypothesis

• Electro-osmosis hypothesis

• Pressure flow hypothesis

• Peristaltic wave hypothesis