Final Exam Preparation

Final Exam Preparation

Grade 8th

Multiple Choice

Name the circulatory system and animals

• Single circulatory system - Sea horse

• Single circulatory system - Frog

• Double circulatory system - Human

• Double circulatory system - Aves

Open Ended

State the advantages of circulatory system shown

Open Ended

List the structures in the circulatory system the blood travels through from vena cava to aorta.

​

• ​Vena cava

• ​Right atrium

• ​Right ventricle

• ​Pulmonary artery

• ​Lungs

• ​Pulmonary vein

• ​Left atrium

• ​Left atrium

• ​Aorta

Open Ended

List useful substances that carried by artery

Multiple Select

Which of the following would increase the risk of coronary heart disease (CHD)?

One, some or all responses may be correct.

• a diet lower in salt

• a diet higher in cholesterol

• strategies to reduce stress

• lack of exercise

Multiple Choice

If fatty deposits form inside the coronary artery, the blood flow to the cardiac muscle

• increases

• decreases

Multiple Choice

What do platelets do?

• They stick together and make fibres that make scabs (blood clots) that stop pathogens entering the blood or stop you bleeding to death.

• They form your immune system and destroy pathogens.

• They carry oxygen around the body attached to haemoglobin.

Open Ended

Mention 2 adaptations of RBC related to its function

Open Ended

Calculate the heart rate from the ECG paper (beat per minute)

​Calculation

​1 small box = 40 ms

​From R to R = 20 small boxes

​1 beat = 20 small boxes x 40 ms

​1 beat = 800 ms = 0.8 s

​Beat per minute = 60 s : 0.8 s = 75 beat / min

Multiple Choice

What do phagocytes do?

• Engulf (surround) microbes and digest them.

• Produce antibodies.

• Release a toxin that kills pathogens.

Multiple Choice

A pathogen is defined as

• a contaminated surface or food.

• a disease-causing organism.

• a transmissible disease.

• a virus.

Multiple Choice

Which describes the features of passive immunity?

• Long term

• Short term

Multiple Choice

A child is vaccinated against measles. After a period of time the child is infected with the measles virus. The graph shows the concentration of measles antibodies in the child’s bloodstream during this time.

Which statement is consistent with the information in the graph?

• After the vaccination, the child produced memory cells.

• The child had passive immunity against measles.

• The measles virus contains antibodies.

• The vaccination failed to protect the child against measles.

Multiple Choice

What do antibodies attach to on the pathogen?

• Anti inflammatory
• Antigens
• Antiseptic
• Antibodies

Multiple Choice

__________ immunity is when the bodies makes its own antibodies.

• passive
• active
• cell mediated
• false

Multiple Choice

Which is an example of passive immunity?

• people being vaccinated against disease
• people taking vitamins to boost their immune response
• people receiving antibodies from their mothers before birth
• people producing antibodies against organisms that cause diseases they have had previosuly

Open Ended

State the 2 advantages of active immunity

Multiple Choice

What happens after the second time you are exposed to a pathogen?

• The body will not be able to fight off the pathogen quickly, because it knows how to get into the body easier.

• The body's immune system will react the same was as it did during the first exposure.

• The body can only be exposed to a pathogen a second time if you do not have a vaccine.

• The body will know how to fight off the pathogen quickly, because memory cells have been created after the first encounter.

Multiple Choice

TRUE or FALSE.

When child B is administered these vaccines, child B will form antigens against both diseases

• TRUE

• FALSE

Open Ended

Explain these two different graphs