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gayaneshka [121]
3 years ago
14

A ______ is a chemical substance used for communication that is produced at one site in the body and then carried in the blood t

o another
Biology
1 answer:
Kryger [21]3 years ago
5 0

Answer: The correct answer is hormone

Explanation:

A hormone is a chemical substance produced by an organ (usually called gland) and on production is released directly into the bloodstream to be transported to another part of the body (usually called target organ) where its exert its function.

An example of hormone is thyroxine, it is produced by the thyroid gland in the neck and exert function on almost all cells of the body

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6 0
2 years ago
Know what makes a solution acidic or basic (the pH number and the ions).
Brrunno [24]

To determine whether an acidic or basic solution, it is first necessary to compare the concentrations of the hydronium (H3O +) and hydroxide (OH-) ions in the solution.

In acidic solution, the concentration of H3O + ions is higher than that of OH- ions.

  • In acidic solution, the concentration of H3O + ions is higher than that of OH- ions. Such a solution can be achieved by adding a small part of the H3O + ions, for example. Acid solutions have a pH below 7, the further away from 7 the pH of the solution is the higher its acidity content.  According to Le Chatelier's principle, when a disturbance is caused to an equilibrium system, it tends to readjust in order to diminish the effects of that force. This means that if an acid is added to water, the H3O + ions will be in excess and the equilibrium will shift in the opposite direction to the left. Then these excess ions will react with the OH- ions. Thus, the concentration of OH- ions will decrease and the solution will become acidic.
  • In basic solutions, the concentration of OH- ions is higher than that of H3O + ions.  If we add a base to the water, it means that we will be adding OH- ions and, as explained in the previous section, by Le Chatelier's principle, the equilibrium of the water selfionization reaction will shift in the opposite direction, and the excess ions will react. with the H3O + ions, decreasing their concentration and making the basic solution.  Basic solutions have a pH greater than 7, the farther from 7 and closer to 14 the pH of the solution, the higher the basification content.

8 0
2 years ago
A special group of chemical substances that are used to treat diseases caused by microbes are called?
Sunny_sXe [5.5K]

A special group of chemical substances that are used to treat diseases caused by microbes are called antibiotics.

An antibiotic is a chemical compound that is toxic to other bacteria and is produced by a living thing, usually a bacterium. In a complex environment like soil, organisms undoubtedly use antibiotics to regulate the growth of competing microbes. Soil microorganisms frequently produce antibiotics.

Bacteria and fungi are microorganisms that produce antibiotics that help prevent or treat disease. With the invention of penicillin in 1941, antibiotics gained widespread recognition. Since then, they have fundamentally changed how bacterial infections in humans and other animals are treated.

To learn more about antibiotic click here

brainly.com/question/10868637

#SPJ4

3 0
2 years ago
Glass plate which the specimen is placed on
scoundrel [369]
Its called a microscope slide
4 0
3 years ago
Why are you less likely to find fossils in metamorphic rocks?
vodomira [7]
Metamorphic rocks are formed from existing rocks, when it is exposed to great heat and pressure. This process would destroy any fossils inside the already existing rock. 
5 0
3 years ago
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