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erastova [34]
3 years ago
5

Why are chemical changes considered "unseen" ?

Biology
2 answers:
Zielflug [23.3K]3 years ago
6 0
Because they take place at an atomic level and are unable to be seen by the human eye
alexira [117]3 years ago
5 0
They are unseen because it is physically impossible to see a chemical change with a human eye.
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Question 5 unsaved adding a unit to move a susceptible group enough to prevent metabolism is known as
mrs_skeptik [129]
<span>adding a unit to move a susceptible group enough to prevent metabolism is known as shifting.
These phenomena happen especially for liposoluble organism circulating in blood like drugs an hormones.
these molecules circulating blood can be divided into two forms : 
The free-form: which is the active part, it circulates freely in the blood, but are easily metabolised.
The bound form: it can be bound to other molecules from the organisms depending on its affinity like proteins (albumin, glycoproteins). this form is not active but is prevented from metabolism.

Competition for bounding proteins can happen between two drugs for example. If they have a different degree of affinity for proteins, then the most affine will displace the less affine from the protein and bound it, and that is call shifting</span>
3 0
3 years ago
Which of the following does smooth muscle fall under?<br> voluntary or<br> involuntary
pochemuha

Answer:

Both cardiac and smooth muscle are involuntary while skeletal muscle is voluntary.

Explanation:

8 0
3 years ago
If a muscle contracts isometrically for a long period of time, an EMG (which records the electrical activity in the muscle) reco
oksian1 [2.3K]

Answer:

During the course of a continuous isometric contraction of given strength, the electrical activity progressively increases. This is due to recruitment of motor units taking place to compensate the decrease in force of contraction occurring in the fatigued muscle fibres.

Explanation:

5 0
3 years ago
It has been determined that the temperature in an autoclave should reach __________ for sterilization.
kolbaska11 [484]

The temperature in an autoclave must reach 121° C in order for sterilization to occur.

<h3>Sterilization using autoclaves</h3>

Autoclaves are used to wet-sterilize materials in the laboratory.

In order for the sterilization to be effective, the temperature of the autoclave must reach 121° C.

Also, substances to be sterilized must spend, at least, 30 minutes in the autoclave.

More on autoclaves can be found here: brainly.com/question/6756965

#SPJ1

5 0
2 years ago
Name the complex substances that food contain? ​
Anika [276]

carbohydrates

fats

proteins

fiber

vitamins

water

Minerals

Explanation:

Food is complex of different minerals. These minerals helps to meet our body demand for materials important for sustenance.

There are different classes of food based on their chemical properties and functions. These classifications are based on the complex nutritive substances that can be derived from them.

  • Carbohydrates supplies energy to the body.
  • Proteins also provides energy and it helps to repair worn out body tissues.
  • Fibers are needed to aid digestion
  • Vitamins provides enzymes for the body
  • water is an essential life compound.
  • Minerals are used for several metabolic processes and they are good electrolytes in the body.

learn more:

Food brainly.com/question/8790597

#learnwithBrainly

5 0
3 years ago
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