Circulation And Respiratory Systems

Question 1

What is external respiration?

A. oxygen is breathed in, and is diffused through the lungs into the blood, any carbon dioxide that is returned to the lungs is breathed out.
B. oxygen in the blood diffuses into the lungs and burnt up to produce oxygen, carbon dioxide is breathed out.
C. oxygen is breathed in, and is diffused through body tissue into the blood, any carbon dioxide that is returned to the lungs is breathed out.
D. oxygen in the blood diffuses into the body tissue and burnt up to produce oxygen, carbon dioxide that is produced is returned to the lungs via the blood.

Answer 1

A. oxygen is breathed in, and is diffused through the lungs into the blood, any carbon dioxide that is returned to the lungs is breathed out

Question 2

At the base of the trachea the windpipe divides into two branches for the left and right lungs. Inside each lung, the windpipe divides further into branches, and smaller branches—just like a tree—called ___________. At the end of these bronchioles are little sacs of air called ________:

A. alveoli, bronchioles.
B. alveoli, epiglottis.
C. bronchioles, alveoli.
D. epiglottis, bronchioles.

Answer 2

C. bronchioles, alveoli

Question 3

What is the protein responsible for carrying oxygen in the blood?

A. plasma.
B. haemoglobin.
C. lutein.
D. carboxyhaemoglobin.

Answer 3

B. haemoglobin

Question 4

Select the correct statement:

A. The biological system that carries carbon dioxide and nutrient-rich blood throughout the body and carries away waste products such as oxygen is called the respiratory system.
B. The biological system that carries carbon dioxide and nutrient-rich blood throughout the body and carries away waste products such as oxygen is called the circulatory system.
C. The biological system that introduces gases to the human body and performs a gas exchange is called the circulatory system.
D. The biological system that introduces gases to the human body and performs a gas exchange is called the respiratory system.

Answer 4

D. The biological system that introduces gases to the human body and performs a gas exchange is called the respiratory system

Question 5

The _________cells are the “armed forces unit” of the body, primed and ready for battle against _________:

A. white blood, antibodies.
B. white blood, carbon dioxide.
C. platelets, lactic acid.
D. red blood, antibodies.

Answer 5

A. white blood, antibodies

Question 6

Of the following, which is the BEST way to prevent heart disease?

A. Eat a low-fat diet.
B. Exercise more.
C. Take preventive medication.
D. Cut down on alcohol.

Answer 6

A. Eat a low-fat diet

Question 7

Select the correct statement:

A. The two sides of the heart have different jobs. The left side pumps oxygen-rich blood throughout the body, while the right side delivers oxygen-rich blood back to the lungs, where the oxygen is released and is re-enriched with carbon dioxide.
B. The two sides of the heart have different jobs. The left side pumps carbon-dioxide-rich blood throughout the body, while the right side delivers carbon-dioxide-rich blood back to the lungs, where the carbon dioxide is released and is re-enriched with oxygen.
C. The two sides of the heart have different jobs. The right side pumps oxygen-rich blood throughout the body, while the left side delivers carbon-dioxide-rich blood back to the lungs, where the carbon dioxide is released and is re-enriched with oxygen.
D. The two sides of the heart have different jobs. The left side pumps oxygen-rich blood throughout the body, while the right side delivers carbon-dioxide-rich blood back to the lungs, where the carbon dioxide is released and is re-enriched with oxygen.

Answer 7

D. The two sides of the heart have different jobs. The left side pumps oxygen-rich blood throughout the body, while the right side delivers carbon-dioxide-rich blood back to the lungs, where the carbon dioxide is released and is re-enriched with oxygen

Question 8

What are the order of the external respiratory system components in the human body starting from the mouth:

A. pharynx, larynx, oesophagus, trachea.
B. trachea, pharynx, oesophagus, larynx.
C. oesophagus, trachea, pharynx, larynx.
D. larynx, pharynx, oesophagus, trachea.

Answer 8

A. pharynx, larynx, oesophagus, trachea

Question 9

Veins

A. carry oxygenated, or carbon-dioxide-rich, blood back to the heart.
B. carry oxygen-rich blood throughout the body away from the heart.
C. carry oxygen-rich blood throughout the body to the heart.
D. carry de-oxygenated, or carbon-dioxide-rich, blood back to the heart.

Answer 9

D. carry de-oxygenated, or carbon-dioxide-rich, blood back to the heart

Question 10

The function of the veins is to

A. carry oxygen-rich blood throughout the body away from the heart.
B. carry oxygen-rich blood throughout the body to the heart.
C. carry de-oxygenated, or carbon dioxide-rich, blood back to the heart.
D. carry oxygenated, or carbon dioxide-rich, blood back to the heart.

Answer 10

C. carry de-oxygenated, or carbon dioxide-rich, blood back to the heart