Bionics Questions – Section 2

932 001 / H9 / 9.3.2.a / 2-4 /

Marks2

Explain the relationship between the structure and function for ventricles.

932 002 / H6, H9 / 9.3.2.b, e / 2-4 /

Marks4

A pacemaker produces regular electrical impulses.

  1. Identify the problems resulting from irregular heartbeat.[1 mark]
  2. Name TWO properties of materials used to make an artificial pacemaker.[1 mark]
  3. Explain how the heart contracts regularly without an artificial pacemaker. [2 marks]

932 003 / H6, H7, H9 / 9.3.2 / 2-3 /

Marks7

The circulatory system is necessary to maintain humans as functioning organisms. Devices such as pacemakers and artificial valves as well as techniques such as angioplasty have all been useful in maintaining circulation in individuals.

  1. Identify materials used in such devices.[2 marks]
  2. Describe TWO properties of these materials that make them useful in biomedical engineering. [2 marks]
  3. Discuss the problems that make ONE of these devices/techniques necessary.[3 mks]

932 004 / H1, H4, H5 / 9.3.2.iii / 3-4 /

Marks2

Heart pacemakers have gradually improved. Identify the technological advances that have resulted in these improvements.

932 005 / H4, H7, H9 / 9.3.2 & 9.3.3 /

Marks1

The most important property of biomaterials is

Abiocompatibility

Bstrength

Celasticity

Dthe substance will not react with body chemicals.

932 006 / H13, H14 / 9.3.1.i & 9.1 / 3-6 /

Marks3

Read the information below on a first hand investigation about heart rate. Then answer the following:

Analyse the graph of this information about changes in heartbeat.

PurposeTo analyse information about changes in the heartbeat during rest and during sustained physical activity.

Procedure

  • Have a student rest for 5 minutes by sitting quietly on a chair
  • During this 5 minutes continuously take the person’s heart rate.
  • For the next 5 minutes have the student participate in a sustained physical activity (eg inclined treadmill, bicycle).
  • During this 5 minutes continuously take the person’s heart rate
  • Have a student rest for 5 minutes by sitting quietly on a chair
  • During this 5 minutes continuously take the person’s heart rate.
  • Record and then graph results

ResultsA graph of the results is shown below

140
Pulse
70
Rate
0 5 10 15
(Minutes)
Rest / Exercise / Rest
932 007 / H4, H7, H9 / 9.3.2.i, vi / 2 - 3 /

Marks1

In some people blood flow to and from the heart is restricted (partly blocked) due to the build up of plaque.

What is the medical procedure or technique used to ease blood flow?

Aangioplasty

Bvalue replacement

Cstent surgery

Dpyrolytic carbon implant

932 008 / H9, H11 / 9.3.2.iv / 3-6 /

Marks5

During your study of the circulatory system, you were required to construct a model to demonstrate the function of valves in the heart.

a)Describe the model you constructed. [2 marks]

b)Justify the design of your model. [3 marks]

Criteria – Part a / Marks
Detailed description with appropriate materials used for demonstration / 2
Description incomplete or relation to function unclear / 1

Criteria – Part b

All components of model justified with reference to the function of valves / 3
Low level justification for design and structure of model / 1 - 2
932 009 / H7, H13, H14 / 9.3.2.i & 9.1 / 3 - 4 /

Marks1

The graphs below show the heart beat of a person before, during and after exercise. The exercise was continuous and involved the same action.

Identify the graph that is most correct.

932 010 / H7, H9 / 9.3.2.i / 2 - 5 /

Marks3

Describe and explain the effects of a build up of plaque on the walls of major arteries on the flow of blood from the heart.

Marking Criteria

/ Marks
Describes at least two changes to the arteries caused by plaque build up.
States how these changes affect blood flow from the heart. / 2 - 3
Describes changes to the arteries and / or effects on blood flow but does not link change to effect. / 1 - 2
932 011 / H4 / 9.3.2.iii / 2 - 3 /

Marks2

Identify THREE types of technological advances that have made improvements in the development of pacemakers possible.

Marking Criteria / Marks
Identifies types of technological advances / 2
Identifies examples improvements / 1
932 012 / H4 / 9.3.2.v / 2 - 3 /

Marks1

Which of the following has the least impact on society due to research into heart transplants?

ALonger life (Increased life expectancy)

BImproved quality of life

CSurgical solutions to medical problems

DEmployment of scientific researchers into heart problems.

932 013 / H9, H13 / 9.3.2.b / 2 - 3 /

Marks3

Blood is returned to the heart from the body via the vena cava. It then travels through various structures before returning to the body. These structures have been labelled A –H. Start at E.

  1. What is the order in which blood would flow from the vena cava to the aorta? [1 mark]
  1. Name structures A and C[2 marks]

Marking Criteria

/

Marks

Part aCorrect order
Part bCorrect names / 1
2
932 014 / H4, H6, H9 / 9.3.2.most / 2 - 4 /

Marks5

To maintain blood flow biomedical devices can replace parts of the circulation system.

  1. Name TWO such biomedical devices.[1 mark]
  1. Describe the properties of materials used in such devices[2 marks]
  1. Discuss problems that would require the need to use such devices.[2 marks]

Marking Criteria

/

Marks

  1. Name TWO devices
  2. Describe properties of materials (identify properties)
  3. Identify issues such as outward symptoms and permanent damage to heart
/ 1
2
2
932 015 / H4, H6, H9 / 9.3.2.most / 2 - 4 /

Marks8

There are a number of bio-medical devices or techniques used to assist with maintaining the role of the circulatory system.

  1. Name three such devices[2]
  1. For ONE of these
  1. Name the device
  2. Discuss the health problems suffered by a person who may need the device.[3]
  3. Describe the properties of the materials used to make such a device.[3]