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
Elena L [17]
2 years ago
11

Describe trilateration. Provide an example.

Biology
1 answer:
kaheart [24]2 years ago
7 0
Trilateration Measures Distance, Not Angles
Using a simple two-dimensional example, let's imagine we have three GPS satellites each with a known position in space. ... This means that the distance could be anywhere on that circle. But this time, we have two known distances from two satellites.
You might be interested in
Please, help me with this one:
e-lub [12.9K]
Homeostasis is a property of an organism or system that  allows its to maintain the controlled parameters within normal ranges. Henry Barbour contributed to the understanding of this concept by his delineation of the reactions of the temperature of the body. This is in line with the same concept that was initially proposed by Claude Bernard. 
8 0
3 years ago
Read 2 more answers
Which scientific term is used to describe a testable model that seeks to explain natural phenomenon
11Alexandr11 [23.1K]
A scientific experiment, in the form of the scientific model, is a testable model used to seek explanation for natural phenomena.
3 0
3 years ago
Following antigenic stimulation, phosphorylation of _________ relieves inhibition of the transcription factor
Maru [420]

Answer: zap70, ITAM.

Explanation:

An antigen is any substance that is capable of stimulating an immune response by activating lymphocytes, which are the body’s infection-fighting white blood cells. Examples of antigens could be proteins that are part of bacteria or viruses or components of serum and red blood cells from other individuals, all of them are foreign antigens originated outside the body. However, there can also be autoantigens (which are self-antigens), originated within the body. In normal conditions, the body is able to distinguish self from nonself. <u>And the antigens that represent a danger induces an immune response by stimulating the lymphocytes to produce antibody or to attack the antigen directly</u>. This is called an antigenic stimulation of the immune system.

ZAP-70 (Zeta-chain-associated protein kinase 70) is a protein that is part of the T cell receptor, thereby it plays a critical role in T-cell signaling. When the TCR (receptor of T cells) is activated by the presentation of the specific antigen through the MHC, a protein called Lck acts to phosphorylate the intracellular CD3 chains and the ζ chains of the TCR complex, allowing the binding of the cytoplasmic tyrosine kinase, ZAP-70. Lck then phosphorylates and activates ZAP-70, which in turn phosphorylates another molecule in the signaling cascade called LAT (short for Linker of Activated T cells), a transmembrane protein that serves as an anchor site for several other proteins. The tyrosine phosphorylation cascade initiated by the Lck culminates in the intracellular mobilization of calcium ion (Ca2+) <u>and the activation of important signaling cascades within the lymphocytes.</u> These include the Ras-MEK-ERK pathway, which is based on activating certain transcription factors such as NFAT, NFκB and AP-1. These transcription factors regulate the production of of certain gene products, most notably cytokines such as interleukin-2 that promote the long-term proliferation and differentiation of activated lymphocytes.

The ITAM motifs (immunoreceptor tyrosine-based activation motif) are sequences of four amino acids present in the intracellular tails of certain proteins that serve as receptors within the immune system. Thus, <u>some receptors such as the TCR have ITAM sequences that, when activated, trigger an intracellular reaction based on consecutive phosphorylations</u>.  Kinases are recruited for this purpose.

So, ZAP-70 is a protein tyrosine kinase with a role in T-cell receptor signal transduction. During T-cell activation, ZAP-70 binds to ITAM and becomes tyrosine phosphorylated. The binding of ZAP-70 to the phosphorylated ITAM is able to activate its kinase activity, <u>and relieves the inhibition of the transcription factor which regulates genes that are involved in the immune reaction</u>.

6 0
2 years ago
Wetlands and estuaries are critical ecosystems, but do not require protection.
aliya0001 [1]

Answer:

FALSE

Explanation:

.

4 0
2 years ago
Who discovered black holes and when?
KIM [24]

Answer:

Karl Schwarzschild discovered black holes in 1916.

Hope this helps!!

5 0
2 years ago
Read 2 more answers
Other questions:
  • By how much did carbon dioxide levels increase from 1980 to 2000?
    6·1 answer
  • In an ecosystem, phosphate levels are usually low because:
    9·1 answer
  • What is the function of fermentation?
    12·1 answer
  • Which statement best explains how the solution should be made?
    8·2 answers
  • Angiosperms may self-fertilize if pollen from a flower is transferred to egg cells in the same flower, or they may cross-fertili
    15·1 answer
  • Identifying Cloud Types
    6·2 answers
  • PLEASE HELP ME !!! PLEADEE I BEG U
    7·1 answer
  • What is a fossil?<br> You're on word
    9·2 answers
  • Which statement best expresses a relationship between organic farming and conventional farming that is presented in the passage?
    10·1 answer
  • What do geologists look for in a geologic cross - section to prove that an igneous intrusion is younger than the rock it is in?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!