AS biology Unit 1-Atherosclerosis and the heart

Question 1 of 51

2

What is the main purpose of the heart and the circulatory system?

Select one of the following:

Primarily used for exchange of oxygen and carbon dioxide between air we breathe and blood
To move substances around the body
To collect carbon dioxide waste materials and fluids for return to the veins.

Explanation

Question 2 of 51

2

Diffusion is the movement of ions or molecules across a cell membrane in the direction that is, from an area of lower concentration to one of higher concentration.

Select one of the following:

True
False

Explanation

Question 3 of 51

2

When it comes to movement of substances around the body, what is the problem for humans and mammals?

Select one or more of the following:

They are smaller and so cannot have enough space for movement to take place
They only have one cell that is used to function their entire being
They have problems functioning properly
They are too large for diffusion to move substances around their bodies quickly enough

Explanation

Question 4 of 51

2

Multicellular organisms deal with their difficulty in moving substances around the body because they usually have blood to carry vital substances around their bodies and a heart to pump it around

Select one of the following:

True
False

Explanation

Question 5 of 51

2

Difference between open and closed circulatory systems?

Select one of the following:

In closed systems: Simple heart pumps blood into the cavities but returns the blood back to the heart, and then to the body
In open systems: The heart pumps blood around the body and substances diffuse between the organs and cells
In closed systems: blood is enclosed within tubes. the blood is forced along fairly narrow channels instead of flowing into large cavities
In open systems: simple heart pumps blood out into cavities surrounding the animal’s organs. Substances can diffuse between the blood and cells. When the heart muscle relaxes, blood is drawn from the cavity back into the heart, through small valved openings along its length.
In closed systems: The blood flows in the body organs which uses enclosed tubes to send it back to the heart
In open systems: The heart pumps the blood in cavaties and then blood is drawn from cavity back into the heart

Explanation

Question 6 of 51

2

Closed circulatory systems are much slower because they are larger and need less pressure to move substances

Select one of the following:

True
False

Explanation

Question 7 of 51

2

In a human the blood flows through the heart once for each complete circuit of the body.

Select one of the following:

True
False

Explanation

Question 8 of 51

2

Why do mammals and birds have higher metabolic rates?

Select one or more of the following:

The oxygen and food substances required for metabolic processes can be delivered more rapidly to cells in mammals and birds
There are extremely large numbers of capillaries which ensure oxygen is exchanged quicker
Longer time for the blood to circulate around their body
Organs diffuse substances quicker to the body , then the heart accepts quicker and then pump blood around.

Explanation

Question 9 of 51

2

That is a diagram of a human circulatory system...

Select one of the following:

True
False

Explanation

Question 10 of 51

2

The transport medium in animals is usually blood

Select one of the following:

True
False

Explanation

Question 11 of 51

2

The blood leaves the heart under pressure and flows along venules to capillaries.

Select one of the following:

True
False

Explanation

Question 12 of 51

2

What is the function of a valve?

Select one or more of the following:

To prevent the blood from flowing in the arteries
To prevent the entrance of waste in the blood
To ensure that blood flows only in one direction
To ensure that the heomoglobin in the blood has enough oxygen

Explanation

Question 13 of 51

2

What plays a vital role in regulation of body temperature, transferring energy around the body.

Select one or more of the following:

Water
Blood
Lymph
Saliva
Urine

Explanation

Question 14 of 51

2

The reason water has an unevenly distributed electrical charge is because it is heavily ionised

Select one of the following:

True
False

Explanation

Question 15 of 51

2

Many biochemical reactions occur in the cytoplasm of cells due to the solvent properties of water

Select one of the following:

True
False

Explanation

Question 16 of 51

2

Polar molecules are said to be...

Select one of the following:

Hydrophobic
Hydrophilic
None of the above

Explanation

Question 17 of 51

2

Why is it difficult for lipids to be transported by transport mediums in the body?

Select one of the following:

Lipids have no ionic properties
Lipids are hydrophobic
Lipids are very soluble
Lipids have strong covalent bonds

Explanation

Question 18 of 51

2

Lipids can be transported around the body by binding with amino acids to form lipoproteins which can then be transported by transport mediums

Select one of the following:

True
False

Explanation

Question 19 of 51

2

The specifi c heat capacity of water, the amount of energy in joules required to raise the temperature of 1 cm3 (1 g) of water by 10 ºC, is very high

Select one of the following:

True
False

Explanation

Question 20 of 51

2



In the diagram, which labeled structures are atrioventricular valves?

Select one or more of the following:

A
B
C
D
E

Explanation

Question 21 of 51

2

What makes arteries and vessels strong and durable?

Select one or more of the following:

Thick walls
Muscle
Collagen
Fibres

Explanation

Question 22 of 51

2

During diastole, blood is forced into arteries and their elastic walls stretch to accommodate the blood.

Select one of the following:

True
False

Explanation

Question 23 of 51

2

What occurs when you feel a pulse?

Select one of the following:

An artery has just passed over a bone close to the skin.
A valve has just closed
The vein that has passed over a bone close to the skin has just returned blood back to the heart
None of the above

Explanation

Question 24 of 51

2

By the time the blood reaches the smaller arteries and capillaries there is a steady
flow of blood.

Select one of the following:

True
False

Explanation

Question 25 of 51

2

The diagram shows a vein

Select one of the following:

True
False

Explanation

Question 26 of 51

2

The heart muscle is supplied with blood through two vessels called the

Select one of the following:

Circumflex artery
Marginal artery
Mitral artery
Cardiac vein
Coronary artery

Explanation

Question 27 of 51

2

One complete sequence of filling and pumping blood is called a

Select one or more of the following:

Pulmonary cycle
Heartbeat
Cardiac cycle
Pulse

Explanation

Question 28 of 51

2

The cardiac cycle can be simplified into four phases

Select one of the following:

True
False

Explanation

Question 29 of 51

2

Blood under low pressure flows into the left and right atria from the

Select one of the following:

Pulmonary veins and vena cava
Inferior vena cava and Pulmonary artery
Pulmonary vein and right ventricle
Just the vena cava

Explanation

Question 30 of 51

2

What phase of the cardiac cycle when the atrioventricular valves are forced open, when the atria fills up with blood

Select one of the following:

Ventricular systole
Ventricular diastole
Atrial systole
None of the above

Explanation

Question 31 of 51

2

What is the correct order of the phases in the cardiac cycle

Select one of the following:

Atrial systole, Diastole, Ventricular systole
Ventricular systole, Atrial systole, Ventricular Diastole, Atrial Diastole
Atrial systole, Atrial diastole, Ventricular systole, Ventricular diastole
Atrial systole, Ventricular systole, Diastole

Explanation

Question 32 of 51

2

Closing of the bicuspid valves and then the tricuspid valves creates the
characteristic sounds of the heart.

Select one of the following:

True
False

Explanation

Question 33 of 51

2

Thrombosis is the the disease process that leads to coronary heart disease and strokes

Select one of the following:

True
False

Explanation

Question 34 of 51

2

What are some of the causes of when the arteries have been narrowed?

Select one of the following:

Athletes foot and Heart attack
Gangrene and Tissue death
Swelling and skin redness
Chest pain and Scars

Explanation

Question 35 of 51

2

A deposit of cholesterol that builds up is called an atheroma

Select one of the following:

True
False

Explanation

Question 36 of 51

2

This picture shows a

Select one or more of the following:

A diseased coronary artery
A healthy coronary artery
A platelet
A diseased pulmonary vein

Explanation

Question 37 of 51

2

Platelets are a type of blood cell with a nuclues

Select one of the following:

True
False

Explanation

Question 38 of 51

2

What happens to platelets when they reach a damaged cell?

Select one or more of the following:

They differentiate to form more platelets
The shrink and stick to each other to form a better a shape
They change shape
Release substances that activate to make more platelets
They grow longer in order to be able to reach and stick to the damaged cell

Explanation

Question 39 of 51

2

Platets change their cell surfaces causing them to stick to the exposed collagen in the wall

Select one of the following:

True
False

Explanation

Question 40 of 51

2

What causes a complex series of chemical changes in the blood?

Select one of the following:

The direct contact of blood with collagen
Exercise
Eating
All of the above
None of the above

Explanation

Question 41 of 51

2

Prothrombin is insoluble

Select one of the following:

True
False

Explanation

Question 42 of 51

2

The first stage of clotting is that thrombrin is converted to prothrombin

Select one of the following:

True
False

Explanation

Question 43 of 51

2

Fibronogen is an enzyme that catalyses the conversion of another soluble plasma protein

Select one of the following:

True
False

Explanation

Question 44 of 51

2

The reason fibrin can form a tangled mesh with its strands is because of its insolubility

Select one of the following:

True
False

Explanation

Question 45 of 51

2

Arteries get atherosclerosis because of the fast flowing blood under preassure causing damage to the walls

Select one of the following:

True
False

Explanation

Question 46 of 51

2

Veins and Arteries get atherosclerosis

Select one of the following:

True
False

Explanation

Question 47 of 51

2

Thromboplastin is released from fibronogen in order to make it easier to convert to fibrin

Select one of the following:

True
False

Explanation

Question 48 of 51

2

In the False-colour scanning electron micrograph, the green coloured substance is the...

Select one of the following:

Fibrins
Platelets
Cells
Fibronogen

Explanation

Question 49 of 51

2

In the False-colour scanning electron micrograph, the yellow coloured substance is the...

Select one of the following:

Fibrins
Platelets
Fiibronogens
Cells

Explanation

Question 50 of 51

2

Angina is chest burn caused by narrowing of the coronary arteries

Select one of the following:

True
False

Explanation

Question 51 of 51

2

Why do we feel pain when we have coronary heart disease?

Select one of the following:

Chemical changes when the muscle respires anaerobically
The burning of the heart muscle after damage to the cells due to high blood pressure in the arteries
Lack of blood supply to the brain
Dead cells occupying areas of heart tissue

	Created by briella-awele over 9 years ago

The heart and circulation

AS biology Unit 1-Atherosclerosis and the heart

AS biology Unit 1-Atherosclerosis and the heart

Question 1 of 51

What is the main purpose of the heart and the circulatory system?

Select one of the following:

Explanation

Question 2 of 51

Diffusion is the movement of ions or molecules across a cell membrane in the direction that is, from an area of lower concentration to one of higher concentration.

Select one of the following:

Explanation

Question 3 of 51

When it comes to movement of substances around the body, what is the problem for humans and mammals?

Select one or more of the following:

Explanation

Question 4 of 51

Multicellular organisms deal with their difficulty in moving substances around the body because they usually have blood to carry vital substances around their bodies and a heart to pump it around

Select one of the following:

Explanation

Question 5 of 51

Difference between open and closed circulatory systems?

Select one of the following:

Explanation

Question 6 of 51

Closed circulatory systems are much slower because they are larger and need less pressure to move substances

Select one of the following:

Explanation

Question 7 of 51

In a human the blood flows through the heart once for each complete circuit of the body.

Select one of the following:

Explanation

Question 8 of 51

Why do mammals and birds have higher metabolic rates?

Select one or more of the following:

Explanation

Question 9 of 51

That is a diagram of a human circulatory system...

Select one of the following:

Explanation

Question 10 of 51

The transport medium in animals is usually blood

Select one of the following:

Explanation

Question 11 of 51

The blood leaves the heart under pressure and flows along venules to capillaries.

Select one of the following:

Explanation

Question 12 of 51

What is the function of a valve?

Select one or more of the following:

Explanation

Question 13 of 51

What plays a vital role in regulation of body temperature, transferring energy around the body.

Select one or more of the following:

Explanation

Question 14 of 51

The reason water has an unevenly distributed electrical charge is because it is heavily ionised

Select one of the following:

Explanation

Question 15 of 51

Many biochemical reactions occur in the cytoplasm of cells due to the solvent properties of water

Select one of the following:

Explanation

Question 16 of 51

Polar molecules are said to be...

Select one of the following:

Explanation

Question 17 of 51

Why is it difficult for lipids to be transported by transport mediums in the body?

Select one of the following:

Explanation

Question 18 of 51

Lipids can be transported around the body by binding with amino acids to form lipoproteins which can then be transported by transport mediums

Select one of the following:

Explanation

Question 19 of 51

The specifi c heat capacity of water, the amount of energy in joules required to raise the temperature of 1 cm3 (1 g) of water by 10 ºC, is very high

Select one of the following:

Explanation

Question 20 of 51



In the diagram, which labeled structures are atrioventricular valves?

By the time the blood reaches the smaller arteries and capillaries there is a steady
flow of blood.

Closing of the bicuspid valves and then the tricuspid valves creates the
characteristic sounds of the heart.