Chapter 8 - Transport In Mammals

Question 1

What is tissue fluid

Answer 1

It’s the substance that bathes the cells in the body. Exchange in substances between the blood and the cells occurs via the tissue fluid.

Question 2

What three steps does the cardiac cycle consist of

Answer 2

• atrial systole
• ventricular systole
• ventricular diastole

Question 3

Explain the process of atrial systole

Answer 3

Atria muscular walls contract, increases pressure further.
This cause atrioventricular valves to open & blood to flow into ventricles.
Ventricular muscular walls are relaxed (ventricular diastole)

Question 4

Explain the process of ventricular systole

Answer 4

Ventricles contract.
Increases blood beyond that of atria.
This causes atrioventricular valves to close, and semi lunar valves to open.
Blood is pushes out of the ventricles into arteries
(Pulmonary & aorta)

Question 5

Process of ventricular diastole

Answer 5

Atria and ventricles are relaxed
Blood will enter atria via vena cava and pulmonary vein.
Semi lunar valves in aorta and pulmonary artery are closed
Blood flows from veins into atria, and into ventricles

Question 6

What three steps does the cardiac cycle consist of

Answer 6

• atrial systole
• ventricular systole
• ventricular diastole

Question 7

Explain the process of atrial systole

Answer 7

Atria muscular walls contract, increases pressure further.
This cause atrioventricular valves to open & blood to flow into ventricles.
Ventricular muscular walls are relaxed (ventricular diastole)

Question 8

Explain the process of ventricular systole

Answer 8

Ventricles contract.
Increases blood beyond that of atria.
This causes atrioventricular valves to close, and semi lunar valves to open.
Blood is pushes out of the ventricles into arteries
(Pulmonary & aorta)

Question 9

Process of ventricular diastole

Answer 9

Atria and ventricles are relaxed
Blood will enter atria via vena cava and pulmonary vein.
Semi lunar valves in aorta and pulmonary artery are closed
Blood flows from veins into atria, and into ventricles

Question 10

Name the reversible reaction, and what it is catalyzed by . (In RBC)

Answer 10

Co2 + h2o —- h2co3

Catalyzed by carbonic anhydrase