Quiz Transport & Biodiversity L2 2022

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

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

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

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

(a)   (e) occurs, heart muscles relaxes

Semilunar valves close to prevent back flow producing (a)   (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