ANIMAL TRANSPORT

Which statement about oxygen combining with haemoglobin is correct?

• All oxygen molecules which combine stop the haemoglobin molecule changing shape.

• Four oxygen molecules can combine with each haem group.

• The first oxygen molecule to combine does not affect the shape of haemoglobin.

• The second oxygen molecule to combine makes it easier for the third to combine.

Ventricular septal defect (VSD) is a heart defect that people can have from birth. People with VSD have a hole in the wall (septum) that separates the left and right ventricles.

What could happen in a person with VSD?

1 Blood will leak through the hole, mostly from right to left.

2 The volume of blood circulating through the lungs will be higher than in a person without VSD.

3 Less oxygen will be delivered to the body tissues.

• 1,2 AND 3

• 1 and 2 only

• 1 and 3 only

• 2 and 3 only

Tags

NGSS.HS-LS2-3

Which row correctly identifies the locations in which a type of molecule or cell is present?

• A

• B

• C

• D

The large arteries close to the heart have a thick elastic layer in their walls. Which statements about this layer are correct?

1 helps to maintain the blood pressure in arteries 2 reduces friction within the arteries

3 prevents too much pressure bursting the artery wall

• A 1, 2 and 3

• B 1 and 3 only

• C 1 only

• D 2 and 3 only

Tags

NGSS.HS-LS1-3

At a certain point in a cardiac cycle, the pressure in the right ventricle is lower than that in the right atrium and lower than that in the pulmonary artery. Which row is correct?A

• A

• B

• C

• D

Tags

NGSS.HS-LS1-3

The graph shows the oxygen haemoglobin dissociation curves at pH 7.6 and at pH 7.2. Which point on the graph shows the percentage saturation of haemoglobin in the blood leaving an active muscle?

• A

• B

• C

• D

Tags

NGSS.HS-LS1-7

Athletes often move from low altitude to high altitude to train for a race. Which statements about the effect of training at high altitude are correct?

1 Higher concentrations of carbon dioxide stimulate greater oxygen dissociation.

2 Lower concentrations of oxygen stimulate the uptake of more oxygen by red blood cells.

3 Lower partial pressures of oxygen stimulate higher production of red blood cells.

• A 1 and 2 only

• B 2 and 3 only

• C 1 only

• D 3 only

The graph shows the oxygen dissociation curves of haemoglobin for eight species of mammal.Which conclusion is consistent with the data shown in the graph?

• A The haemoglobin of larger mammals will combine with oxygen at a lower partial pressure of oxygen than that of smaller mammals.

• B The haemoglobin of larger mammals will release oxygen at a higher partial pressure of oxygen than that of smaller mammals.

• C The metabolic activity of the mammal is directly proportional to the ability of its haemoglobin to release oxygen.

• D The size of the mammal is directly proportional to the ability of its haemoglobin to release oxygen.

A person moves from sea level to live at a high altitude. After three months living at high altitude, which change would be found in this person when at rest?

• A increased volume of blood per heartbeat

• B increased breathing rate

• C increased heart rate

• D increased mass of red blood cells

Tags

NGSS.HS-LS1-3

What is found in all blood vessels, lymph and tissue fluid?

1 carbon dioxide 2 glucose

3 white blood cells 4 antibodies

• A 1, 2, 3 and 4

• B 1, 2 and 3 only

• C 1, 3 and 4 only

• D 2 and 4 only