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
OlgaM077 [116]
3 years ago
12

Why did classical astronomers conclude the heavens were made up of sphere?

Biology
1 answer:
Natalija [7]3 years ago
8 0
The classical astronomers concluded that heavens were made up of a sphere, because heavens were thought to be perfect and spheres (circles) are a perfect shape. It was Plato who argued that geometrical figures were spheres and everyone agreed to him. It was also believed that the perfect motion of spheres was a uniform circular rotation. 
You might be interested in
How is a scientific theory different from everyday theories proposed by random individuals?
Alex17521 [72]

Answer:

D

Explanation:

4 0
3 years ago
Read 2 more answers
Some homeostatic imbalances cause a variable that is normally controlled by negative feedback to be abnormally controlled by pos
tigry1 [53]

Answer:

True

Explanation:

Some deviations from normal homeostasis activate the positive feedback loops to control the conditions which are otherwise regulated by negative feedback mechanisms.

For example, the blood levels of respiratory gases and H+ ions are regulated by a negative feedback system via chemoreceptors. The increased partial pressure of carbon dioxide gas and lowered pH or lowered partial pressure of oxygen in the blood are sense by central and peripheral chemoreceptors which in turn activate the neurons of the dorsal respiratory group (DRG).

The activated DRG triggers an increased in the rate and depth of the breathing to facilitate the inhalation of more oxygen and exhalation of CO2 to restore the normal levels.  

However, hypocapnia inactivates the chemoreceptors and does not allow negative feedback to restore the normal CO2 levels in the blood.  

Under such conditions, the positive feedback loop stimulates the DRG neurons more strongly in response to the increased partial pressure of CO2 above the normal levels than when the partial pressure of oxygen falls below the normal level. These dangerously lowered oxygen levels may also cause fainting.  

5 0
3 years ago
An analysis of a sample of urine, shows the presence of blood cells and glucose. Account for the presence of these substances in
erica [24]

Answer:

It could mean that your kindneys arent filtering your blood properly

8 0
2 years ago
What subatomic particle(s) has a mass of 1 amu?
Fantom [35]
~Hello there! ^_^

Your question: What subatomic particle(s) has a mass of 1 AMU?

Your answer: Both proton and electron have the same mass of 1 AMU.

Hope this helps~




8 0
3 years ago
Read 2 more answers
The term respiration describes the exchange of gases between your blood and the air. Cellular respiration ________.
kotegsom [21]

Answer:

The term describes cellular respiration

Explanation:

Cellular respiration, also known as internal or tissue respiration can be represented by the equation:

C6H12O6 + 6H2O ---> 6H2O + 6CO2 + Energy (in form of ATP)

From the equation, glucose from the blood is oxidized by oxygen trapped from the air by the nostrils. The main purpose of cellular respiration is to generate energy required by the body for various life activities

8 0
2 years ago
Other questions:
  • Is glucose a carbohydrate that stores chemical energy in a concentrated and stable form
    15·1 answer
  • What patterns is most likely to indicate a food borne illness?
    6·1 answer
  • Describe how you produced summated contractions with the isolated muscles and how you produced a tetanus contraction. explain ho
    7·1 answer
  • Which basic need is a Fox meeting by feeding on berries
    10·1 answer
  • THE MARTIAN AND THE CAR: Characteristics of Life
    6·1 answer
  • Alfred Wegener's theory about earth's past included a supercontinent made up of all the continents put together. What was the na
    5·2 answers
  • What is carbon fixation?
    11·1 answer
  • What is the valence of an atom with six electrons in its outer electron shell?
    11·1 answer
  • Name the 3 tests used to diagnose lactose intolerance.
    15·1 answer
  • Which characteristics do all bony and jawless fish have in common? Check all that apply.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!