1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
beks73 [17]
11 months ago
11

the first cells likely to encounter a pathogen, such as phagocytes, are professional antigen presenting cells (apcs). this means

they choose one: a. can activate complement. b. are primed to proliferate and attack the invader. c. can produce antibodies against the pathogen. d. can activate cells of the adaptive immune system.
Biology
1 answer:
Zepler [3.9K]11 months ago
8 0

Professional antigen-presenting cells, such as phagocytes, are the first cells to encounter a pathogen (apcs). This means they have the ability to activate cells of the adaptive immune system.

<h3>What is meant by Pathogen?</h3>
  • A pathogen is an organism that infects its host with disease, and the severity of the disease symptoms is referred to as virulence.
  • Pathogens include viruses, bacteria, unicellular and multicellular eukaryotes, and a wide range of other organisms.
  • The bone marrow of an average healthy adult generates 100 billion new neutrophils per day. Because there are so many neutrophils in the body at any given time, they are often the first cells to reach the site of an infection.
  • Long thought to be a component of the innate immune system, complement has recently emerged as an important regulator of the adaptive immune response.

Therefore the correct option is D)  can activate cells of the adaptive immune system.

To learn more about Pathogen, refer to:

brainly.com/question/1008643

#SPJ4

You might be interested in
You have learned that the fusion of egg and sperm produces a zygote. But how does the sperm reach the egg, and how does the zygo
FrozenT [24]

Answer:

Pollen grain lands on stigma

Explanation:

A) Pollen grain lands on stigma

  • pollen tube grows down the style
  • generative cell divides, forming two sperm
  • two sperm are discharged to them female gametophyte
  • sperm fuse with the egg and two polar nuclei
  • zygote forms and divides into a terminal cell and a basal cell
  • cells of embryo differentiate into three tissue types---- seed dries out and becomes dormant.

B)

  1. During pollination, a pollen grain is transferred from an anther to a stigma. Once the pollen grain lands on a suitable stigma, it germinates and forms a pollen tube, a structure that grows down through the style to the ovary.
  2. Once in the pollen tube, the generative cell from the pollen grain divides by mitosis, forming two sperm. The sperm travel down the pollen tube and are discharged into the female gametophyte. In a process called double fertilization, one sperm fertilizes the egg, forming the zygote; the other sperm fuses with two polar nuclei in the female gametophyte, forming a triploid (3n) nucleus. The zygote develops into the plant embryo, and the triploid nucleus divides and gives rise to the endosperm. Double fertilization prevents the waste of the plant's resources by ensuring that the nutrient-rich endosperm only develops if the egg is fertilized.
  3. After double fertilization, the ovule starts to develop into a seed containing the plant embryo. As the embryo develops, the three tissue systems are established, and the cotyledons (seed leaves) form. The seeds of many species dry out as they mature. These dry seeds lie dormant until suitable germination conditions occur.

3 0
3 years ago
If a child has two genes for blonde hair (one from each parent), his genotype is said to be
lianna [129]
His gene type is dominant
8 0
3 years ago
Read 2 more answers
I’ll mark brainiest if your right need ASAP
Scorpion4ik [409]

Explanation:

Comee theree please

Its urgent

5 0
2 years ago
Read 2 more answers
12. Integral proteins are located
adelina 88 [10]

Answer:

Integral membrane proteins are permanently embedded within the plasma membrane. They have a range of important functions. Such functions include channeling or transporting molecules across the membrane. Other integral proteins act as cell receptors

Explanation: HOPE U GET AN A HAVE A GREAT DAY!!!

6 0
3 years ago
What is the difference<br>between selective and cross breeding ?​
Zinaida [17]
SELECTIVE BREEDING INVOLVES CHOOSING PARENTS WITH PATICULAR CHARACTERISTICS TO BREED TOGETHER AND PRODUCE OFFSPRING WITH MORE DESIRABLE CHARACTERS . ... CROSS BREEDING INVOLVES TWO DIFFERENT BREEDS FROM THE SAME SPECIES TO CREATE A NEW BREED
3 0
2 years ago
Other questions:
  • Using the gas pedal analogy explain the impact on the cell cycle of a proto
    5·1 answer
  • Identifying an individual’s genetically influenced health risks could increase their potential to achieve optimal health. TRUE O
    13·1 answer
  • What is a baby hamster called?
    13·2 answers
  • What is the y-axis of this chart
    8·1 answer
  • Which term describes an inherited or innate trait that allows an organism to survive in its particular environment?
    12·1 answer
  • Sickle cell anemia and albinism are both recessive traits in humans. The genes for these traits are located on different chromos
    15·1 answer
  • What is a joint? describe the function of movable joints in the body?
    15·1 answer
  • which statement describes the relationship between chromosomes, genes, and alleles? a. alleles move genes to a specific location
    5·1 answer
  • What makes a chaparral different from a desert?
    15·1 answer
  • What will the Government and Education be like on your colony?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!