Question Question 1 Which of the following white blood c

19 Jun Question Question 1 Which of the following white blood c

Question
Question 1
Which of the following white blood cells kills its target cells by releasing chemicals that break down the target cell membrane?
Answer

natural killer cells

B lymphocytes

basophils

T lymphocytes

macrophages
1 points

Question 2
Which of the following is not true regarding the circulatory system?
Answer

This system ensures that waste products are removed from all tissues of the body.

This system is made up of the blood vessels, heart, and blood.

The circulatory system has an important role in the exchange of gases in the lungs.

During fetal development, the circulatory system develops from the lymphatic system.

This system carries excess water and salts to the urinary system.
1 points

Question 3
Eosinophils are especially important in defending the human body from infection by:
Answer

bacteria.

viruses.

molds.

large parasites.

both bacteria and viruses.
1 points

Question 4
The primary immune response
Answer

involves recognition of an antigen.

typically has a lag time of 3 days.

involves the production and proliferation of T cells.

produces antibodies and immunity.

All of the above
1 points

Question 5
An increased risk for cardiovascular health problems is associated with:
Answer

an elevated level of hemoglobin.

high blood levels of HDLs.

decreased production of albumins.

high blood levels of LDLs.

low blood levels of LDLs.
1 points

Question 6
In some countries, there is not enough money to support the development of vaccines; those that are developed are difficult to administer. Therefore, researchers are attempting to genetically engineer bananas to produce oral vaccines, making it easier to deliver the vaccine to individuals.
Answer
True

False

1 points

Question 7
Hemolytic disease of the newborn could result from which of the following situations?
Answer

mom is Rh+; fetus is Rh-

mom is Rh-; fetus is Rh+

mom is Rh+; fetus is Rh+

mom is Rh-; fetus is Rh-

either C or D
1 points

Question 8
Which of the following is not true regarding the immune response?
Answer

The immune response uses chemical and phagocytic cells to destroy foreign cells.

Once initiated, the immune response provides protection for the entire body.

The key to immune response is the ability of the components involved to be able to distinguish between the body cells and foreign cells.

The immune response involves the activities of proteins, cells, and the lymphatic system.

The immune response involves the ability to “remember” exposures to pathogens in order to increase the rate of response upon subsequent infections by that pathogen.
1 points

Question 9
Which of the following is not true regarding the lymphatic system?
Answer

Lymphatic vessels have valves that keep lymph moving in one direction.

Blood flows into lymphatic capillaries, is filtered, and then flows out of lymphatic capillaries.

Lymph contains proteins, fats, and white blood cells.

Lymphatic vessels merge to form the thoracic duct and right lymphatic duct.

Lymph is transported to the bloodstream.
1 points

Question 10
Which of the following types of white blood cells is capable of phagocytosis?
Answer

eosinophils

basophils

neutrophils

B lymphocytes

both eosinophils and B lymphocytes
1 points

Question 11
Why do some physicians advise patients with a bladder infection to drink a lot of cranberry juice?
Answer

Cranberry juice contains chemicals that kill viruses and bacteria.

The increased volume of fluid in the bladder causes bacterial cells to burst as they absorb the excess fluid.

Cranberry juice makes the urine more acidic, decreasing the rate at which microorganisms can grow and reproduce.

Cranberry juice increases the efficiency of urine production by the kidneys.

all of the above
1 points

Question 12
Which of the following is not true regarding macrophages?
Answer

remove and destroy old blood cells and tissue debris

release chemicals that stimulate the production of other white blood cells

develop from B lymphocytes in response to the presence of an antigen

are capable of phagocytosis

are active within the tissues
1 points

Question 13
Non specific defenses in the human body include all of the following except
Answer

cell-mediated immunity

phagocytosis

interferons

the inflammatory response

the complement system
1 points

Question 14
Which of the following body fluids is not known to transmit HIV from human to human?
Answer

blood

semen

saliva

vaginal fluid

breast milk
1 points

Question 15
About 55% of whole blood is ____, which is mostly made up of water.
Answer

plasma

hemoglobin

white blood cells

clotting proteins

hematocrit