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
ser-zykov [4K]
3 years ago
5

How does the skeletal system of an embryo differ from that of an adult?

Biology
1 answer:
Cloud [144]3 years ago
8 0
Almost the entire system of an embryo is made of cartilage, whereas that of an adult is mostly made of bones.
You might be interested in
Which is an exotic companion animal?
Andrew [12]

Answer:

d ferret is an exotic animal

5 0
3 years ago
Before a cell can divide it must copy one dna_____at a time in a process called DNA replication.
Gwar [14]

Answer:

DNA replication is the process by which a molecule of DNA is duplicated. When a cell divides, it must first duplicate its genome so that each daughter cell winds up with a complete set of chromosomes.

Explanation:

6 0
2 years ago
Donde se desarrolla el embrion en los seres vivos
aniked [119]

Answer:

en los seres humanos se desarrollan en el útero

Explanation:

6 0
3 years ago
Someone please help me with this I really need to pass this test!!!!
mafiozo [28]

The conductor is similar to the nucleus of the cell. Like how the conductor controls the train, the nucleus controls and regulates cell activity.

8 0
3 years ago
Explain the interaction that occurs between a t-helper lymphocyte and a b cell when the b cell is being induced to produce peanu
Paraphin [41]

Answer:

           According to Dr. Ray Schiling (member of the American Academy of Anti-aging medicine) about 1.5 million people suffer from peanut allergies. The seeds of peanut (<em>Arachis hypogea</em>) contain an array of allergens that can induce the production of IgE specific antibodies predisposed individuals. Ara1 and Ara2 are most common seed storage protein that cause allergy. Other allergen proteins such as Ara3 to Ara 17 have also been identified that cause allergy.  


Entry of peanut allergen into body

When peanut allergens enter the body of an individuals it leads to development of different symptoms like itchy skin, tingling sensation, nausea, runny nose and anaphylaxis.  

Allergic response

There are two subsets of T-cells Th1 and Th2. Both invoke different response to allergens. Th1 direct a non-allergic response while Th2 direct allergic response ranging from releasing of histamine to anaphylactic response. The presence of IL-12 cytokines direct a Th1 based, nonspecific response.  


Mechanism of allergic response (interaction between helper T cell and B cell)

Step 1.  

           When allergen enter to body they are encountered by B cells. Immunoglobulin receptors on the surface of B cells recognize antigen (Peanut allergens) and get attached, which are then internalized and processed. Within B cells the fragments of antigens combine with HLA class 2 proteins.  

Step 2

             HLA class 2 with antigen fragments (peanut allergens) then display on the surface of B cells.

Step 3

            Receptors on the surface of helper T cells recognizes the complex of HLA class 2 and antigen fragments (peanut allergen) and is activated to produce cytokines, which activate the B cells.  

Step 4

             B cell is activated by cytokines and begins clonal expansion. Some of the progeny become anti-body producing plasma cells while other become memory B cells.  


7 0
3 years ago
Other questions:
  • After reading the paragraphs below, answer the questions that follow.
    7·1 answer
  • The graph shows the number of calories two people burned while they perform various exercises for one hour. Which conclusion is
    11·2 answers
  • every living thing needs a set of instructions that are necessary to live and grow. Where are these instructions found?
    15·1 answer
  • Why does the fact that the red cells have different proteins to the white cells alter the function of the cell ?
    14·1 answer
  • The great burdock plant's seeds have spines on them that attach to the fur of animals that brush against it. the seed then trave
    12·2 answers
  • Which best describes a primary succession
    11·1 answer
  • DNA contains coded information for body structure, hibernation, height, eye color, and photosynthesis.
    14·1 answer
  • Every day we make choices that can potentially affect our environment. For example, we may toss a plastic drink bottle into the
    5·1 answer
  • The two sides of the DNA helix are held together by
    12·2 answers
  • Which best describes the beggining of the big bang theory
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!