Unit B Review

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  Review

On the next page, you will take a 35-question unit test. Are you confident you know the Unit B material well?


It's always a good idea to make sure you are prepared for a test by studying. You can do this by returning to the Table of Contents and reviewing any Unit B lessons you are not sure about.


Also, you can review unit B material by trying three review exercises.

  1. Create a mind map of the unit material. A mind map is a visual representation of how all the ideas and concepts of the unit connect with each other. Try building a mind map by clicking the first tab below.

  2. Do a puzzle! A puzzle can be a fun way to review unit concepts or terms. Try the puzzle we have prepared for you by clicking the second tab below.

  3. Practice answering some questions. We have prepared some questions that will really get you thinking about the unit material. Try the practice questions by clicking the third tab below.


Remember, these are just suggestions for review! In addition to doing these three review exercises, you might also:

  • Contact your teacher for assistance if you are not sure about any concepts.
  • Check the course glossary and read all the unit B terms.
  • Make your own study cards and test yourself.


Whatever you choose to do, good luck with your unit review!


Make a Mind Map
A mind map is a visual representation of how all the ideas and concepts of the unit connect with each other. There are several ways you can create a mind map:

  • You can create a mind map simply with just a pen and a sheet of paper.
  • You might try to build one using a free drawing program such as GIMP.
  • You can use a web-based free mind map generator such as MindMup. MindMup is pretty easy to figure out just by playing with it, but click here if you want to view a short tutorial.
As an example to get you started, below you will see the start of a mind map for Unit B that was built using MindMup. You can re-create it and build on it, or create a completely new one of your own.




Do a Puzzle
A puzzle can be a fun way to review unit concepts or terms. We have prepared a Unit B review puzzle for you, and there are several ways you can make the most of it:





Complete Review Questions
The following 5 questions are meant to get you thinking about the Unit B material. Answers are provided below each question, but before you look at the answer, you should really try hard at answering the question yourself. If you have to, review the Unit B lessons.


Question 1
4 marks ( 1 mark per listed function, 1 mark per explanation)

The human skeleton is made of bones. Bones serve several important functions in the human body.



List two functions of human bones. Explain how the structure of bones supports each function.

  • Bones provide support and protection for other body organs. Bones are connected with joints to make a supportive skeleton structure. The outer layer of bones is made from hard, rigid minerals. This hard mineral covering provides support to the body and protects the soft inner layer of bones.
  • Bones contain bone marrow. Bone marrow is an inner soft tissue that is able to produce blood cells.

Question 2
2 marks

The microscope was invented in the 1600’s. The microscope changed the way that humans understood and cured diseases.

 

Why was the microscope an important invention for learning to cure human diseases?

The invention of the microscope allowed people to see microorganisms. Scientists were able to observe that microorganisms, such as bacteria and viruses, cause many diseases. Scientists could see how microorganisms interact with cells, and in turn, learn how to develop medicines that work against harmful microorganisms.


Question 3
2 marks

A carpenter in a woodworking shop wears a face mask covering his nose and mouth.

 

What health reasons would a carpenter have for wearing a face mask in a woodworking shop?

  • Sawing wood creates tiny sawdust particles.
  • Wearing a face mask prevents sawdust particles from entering the lungs and causing inflammation. Inflammation of the lung’s airways creates mucus and swelling that narrows the airways, decreasing lung capacity and causing breathing problems.


Question 4
3 marks (1 mark per description)

A man doesn’t check the depth of the water before diving off a cliff into a lake, and breaks his spine at his neck. This results in a spinal cord injury.

 

Describe how a spinal cord injury is caused by broken spine bones.
Describe how a spinal cord injury affects a person’s body.
Describe how a spinal cord injury changes a person’s lifestyle.

3 marks total.
1 mark per description

  • The spinal cord of the central nervous system is surrounded by spine bones. When a spine bone breaks, bone fragments cut into the spinal cord, causing an injury that breaks neurons.
  • A torn spinal cord means that messages can’t move between the brain and the body. This can cause paralysis in body limbs that are lower than the spinal cord injury.
  • Spinal cord injuries that cause paralysis change a person’s life dramatically. People with spinal cord injuries often have to use a wheelchair. They often can’t do many actions independently anymore.

Question 5
4 marks (1 mark for the disease, 1 mark for the organ system, 2 marks for the description)

Bacteria and viruses do not cause all diseases. Some diseases are caused by human lifestyle choices.

List one example of a disease caused by human choices.
What organ systems are affected by the disease?
Describe how the disease affects the organ system.

4 marks total
1 mark for the disease, 1 mark for the organ system, 2 marks for the description
Answers will vary

Sample answers:
  • Smoking causes bronchitis. This disease affects the respiratory system. Toxic particles in cigarette smoke coat air passages in the lungs. This causes inflammation in the lungs, causing airways to swell and narrow. Less air can enter the lungs, which causes the smoker to have difficulty breathing.
  • Eating too many fatty foods causes atherosclerosis. This disease affects the circulatory system. Cholesterol from fatty foods builds up on the walls of arteries. This can eventually completely block arteries, preventing blood from flowing everywhere in the body. Atherosclerosis leads to high blood pressure, strokes, and heart attacks.