answer.
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
Arisa [49]
2 years ago
7

During a second infection, the immune system activates _____ that were created during the first exposure.

Biology
2 answers:
navik [9.2K]2 years ago
7 0
During a second exposure to pathogens/viruses, the B helper and T helper cells are activated quicker, and so antibodies are made quicker to help fight against the infection
oee [108]2 years ago
3 0

The immune system activates helper T cells. // grad point

You might be interested in
How does a cow use the sugar molecules stored in the grass it eats?
11111nata11111 [884]

ANSWER: A living organism intakes food, it breaks down into mostly water and large organic molecules. These large organic molecules are Fat, Proteins, Glucose, Starch and Cellulose. These molecules are still not usable by the cells so the body breaks these large polymers into small monomers.

In cow's muscles, protein muscles are built by tapping 4 amino acid monomers. Fat muscles are built by tapping 3 fatty acid monomers and 1 glycerol molecule.

Cows use glucose molecules to mix with oxygen to release chemical energy in cellular respiration. Cows can make fat molecules and glucose molecules because fatty acids and glycerols are made up of same atoms, C, H and O.

3 0
2 years ago
Since viruses are typically 20-200 nm in diameter, the ____ microscope is best for viewing them.
tatyana61 [14]

Electron is the best way for viewing them

3 0
2 years ago
Read 2 more answers
The Punnett square for a non-freckled parent and a homozygous freckled parent is shown below. What is the probability that their
ratelena [41]
The answer is A 100%
7 0
2 years ago
Read 2 more answers
A class of biology students conducted an experiment on ants. Each group was randomly assigned 20 ants. Each ant was placed halfw
Mrac [35]

Answer:

Because the repetition of the experiment yields different results when they are realized by distinct groups of students .

Explanation:

The students needs to repeat the experiment and increase the value of n (sample size) in order to obtain statistically significant results and thus confirm the working hypothesis.

6 0
2 years ago
The action potential propagates along the sarcolemma. as the action potential spreads down the t tubules of the triads, voltage-
Ganezh [65]
It permits calcium to leave the sarcoplasmic reticulum and enter the cytosol. During muscle contraction, the binding of acetylcholine initiates an excitatory impulse, which is transmitted to the deep of the muscle via T tubules. T tubules are the invaginations of cell membranes of muscle cells (sarcolemma). When the action potential travel down the t-tubules, they change shape and allow the calcium ions to enter into the sarcoplasm from the sarcoplasmic reticulum.
6 0
2 years ago
Other questions:
  • Snakes have slimy skin true or false
    12·2 answers
  • An entrepreneur estimates his total profit (total revenue minus total cost) for his proposed company as p(x) = x3 − 4x2 + 5x − 2
    7·2 answers
  • Use the drop-down menus to match each phrase below with the type of microscope it describes.
    11·2 answers
  • View the animation about getting into the fossil record, and write several sentences summarizing how a dinosaur can become a fos
    14·1 answer
  • Dorsal spines give which fish its name? barracuda lion fish clown fish 3 spined stickleback
    7·2 answers
  • Suppose the human trait for hair type is controlled by a simple dominant and recessive relationship at one locus. Curly hair, C,
    9·1 answer
  • In general, a signal transmitted via phosphorylation of a series of proteins A) brings a conformational change to each protein.
    9·1 answer
  • Diatoms are marine organisms with unique cell walls that contain the element silicon. Which of the following are two common elem
    9·1 answer
  • A 12-year-old boy presents to the ER complaining of right testicular pain. Symptoms began 1 hour ago. He describes the pain as a
    12·1 answer
  • Which of the following is not a unique property of water
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!