Practice Quiz 3.3 - Human Body

Sweat and skin secretions containing a mixture of molecules that kills or limits [controls] the growth of many types of microbes is an example of:

• a feedback loop to maintain homeostasis.

• an enzyme-catalyzed biochemical reaction.

• a specific immune response to an infection by microbes.

• a nonspecific defense against infection.

Which of the following describes your immune system’s specific defenses?

• They respond to a particular [single specific] pathogen.

• They respond to a general threat of infection.

• They include fever and inflammation of the infection site.

• They include your skin, mucus, and eyelashes.

Why does the blood flow from the heart, through the lungs?

• Oxygen diffuses out of the blood, and carbon dioxide diffuses into the blood.

• Oxygen diffuses into the blood, and carbon dioxide diffuses out of the blood.

Which describes the function of Killer T-cells?

• Slow down or stop the immune response.

• Remember pathogens for future attacks.

• Destroy foreign objects of infected tissues.

• Signal for more cells to attack an invader.

During the winter you become sick with the flu. Shortly after that, you become sick with strep throat. Will the same type of B-cells that fought the pathogen that causes the flu (a virus) fight the pathogen that causes strep throat (a bacteria)?

• No, B-cells fight viruses while T-cells fight bacteria.

• Yes, B-cells recognize similar antigens such as bacterial and viral pathogens.

• No, every B-cell is capable of recognizing one specific antigen.

• Yes, every B-cell is capable of fighting every pathogen with which it comes in contact.

Influenza (the “flu”) is a viral infection that can have the following symptoms: fever, runny nose, sneezing, headache, chills, cough, body pain, and a sore throat. As a prevention of these severe symptoms, a person can receive what type of treatment?

• Antibiotics

• Vaccine

• Rest & Fluids

• Hyperbaric

The diagram shows a comparison between a healthy artery and one with arteriosclerosis.      Which body function is most affected by arteriosclerosis?

• Circulating blood and oxygen to the tissues.

• Assembling amino acids into proteins.

• Replacing damaged cells with new cells.

• Breaking down food particles into molecules.

What is the cerebellum (the little brain) responsible for?

• visual processing

• balance movement and coordination

• sound and language

• orientation, navigation, and body awareness

The right atrium, left ventricle, aorta and

superior [top] vena cava are each shown respectively by the diagram letters:

• B, F, D, and O

• N, H, A and O

• M, G, A, O

• E, K, C and J

Number 10 on the diagram shows the __________ of your brain.

• cerebellum

• frontal lobe

• pons

• medulla