01
True or false
1 point
True or false: After microbes breach physical and chemical barriers, innate defenses can respond rapidly before a targeted adaptive response develops.
Free Practice Quiz Question List
9 Host Defenses and Microbial Disease Online Quiz Questions
Use this free practice quiz with 20 questions to review 9 Host Defenses and Microbial Disease, test your knowledge, and prepare for your next test or exam.
20 questions
02
Choose one
1 point
Which statement best explains why vaccination is a form of active immunity?
- A
The person receives ready-made antibodies that provide protection without an immune response of their own.
- B
The person's immune system responds to a vaccine antigen and may produce memory cells.
- C
The vaccine directly destroys any microbes already present in the body.
- D
The person becomes protected only if the vaccine contains a live disease-causing pathogen.
03
Fill in the blank
1 point
Complement can coat microbes to make them easier for immune cells to engulf. This engulfment process is called .
04
Written response
1 point
Which type of T cell coordinates immune responses by signaling to other immune cells?
05
Choose one
1 point
A patient has influenza, and a clinician considers a drug that interferes with a stage of viral replication. Which drug class is appropriate to consider?
- A
An antibiotic
- B
An antifungal drug
- C
An antiviral
- D
An antiparasitic drug
06
Choose all
1 point
Which actions can antibodies perform? Select all that apply.
- A
Neutralize some viruses or toxins.
- B
Block microbes from attaching to host cells.
- C
Directly turn themselves into memory B and T cells.
- D
Mark pathogens for destruction by phagocytes or complement.
07
Fill in the blank
1 point
After an adaptive immune response, some activated B and T cells become , which can support a faster, stronger response to a later encounter with the same or a sufficiently similar antigen.
08
True or false
1 point
True or false: Antimicrobial resistance is a property of microbes, not of a person's body.
- A
True
- B
False
09
Choose one
1 point
A virus-infected cell produces a signal that helps limit viral replication. Which substance best fits this role?
- A
Antibodies, which are secreted by plasma cells
- B
Interferons, which help limit viral replication
- C
Complement, which makes viral replication faster
- D
Memory B cells, which engulf infected cells
10
Written response
1 point
What type of immunity results from receiving ready-made antibodies?
11
Choose all
1 point
Which are strategies pathogens can use to evade or weaken host immune defenses? Select all that apply.
- A
A capsule that makes a microbe harder for phagocytes to capture.
- B
Antigenic variation that changes exposed antigens.
- C
Intracellular survival that shelters a microbe from some extracellular defenses.
- D
Interference with host immune signaling or resistance to complement.
- E
Formation of memory cells that support a faster response to a later exposure.
12
Open ended
1 point
A virus is replicating inside host cells. Explain how interferons and natural killer cells can each help defend against this infection, distinguishing their roles.
13
Choose one
1 point
Some antibiotics treat bacterial infections by interfering with the construction of which structure?
- A
Viral protein release
- B
Fungal cell-wall construction
- C
Bacterial cell-wall construction
- D
Antibody production by plasma cells
14
True or false
1 point
True or false: Every vaccine completely prevents infection and provides lifelong protection.
- A
True
- B
False
15
Written response
1 point
A neutrophil surrounds and takes in a microbe. What is this process called?
16
Choose one
1 point
A microbe has not yet entered body tissues. Which defense is most likely to act first?
- A
Antibodies made by plasma cells
- B
Physical barriers at body surfaces
- C
Memory B cells activated by a previous infection
- D
Cytotoxic T cells killing infected host cells
17
Choose one
1 point
How can complement help phagocytes capture microbes?
- A
Produce antibodies that recognize a specific antigen
- B
Present microbial material to T cells
- C
Coat microbes to make them easier to engulf
- D
Form memory cells that respond to later exposure
18
Choose one
1 point
How can a dendritic cell help connect innate defenses to a targeted adaptive response?
- A
They present pieces of microbial material to T cells.
- B
They secrete antibodies that neutralize toxins.
- C
They kill all microbes by releasing interferons.
- D
They become the memory cells that recognize every pathogen.
19
Written response
1 point
After receiving a vaccine, a person's own immune system makes antibodies and memory cells. What type of immunity is this?
20
Choose one
1 point
A response needs both coordination of immune cells and killing of infected host cells. Which pairing of T-cell functions fits these roles?
- A
Helper T cells engulf microbes, while cytotoxic T cells secrete antibodies.
- B
Helper T cells form capsules, while cytotoxic T cells block complement.
- C
Helper T cells kill all microbes directly, while cytotoxic T cells activate B cells by secreting antibodies.
- D
Helper T cells coordinate responses by signaling, while cytotoxic T cells can kill infected host cells.