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ryzh [129]
3 years ago
14

What is the main purpose of controlled variables in an experiment?

Biology
1 answer:
Mila [183]3 years ago
4 0
A variable that is held constant in order to assess or clarify the relationship
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Very small changes in the solute concentrations in the various fluid compartments cause water to move from one compartment to an
Oksana_A [137]

Answer:

a. Decrease water reabsorption : decrease blood pressure.

b. Decrease peripheral resistance : decrease blood pressure

c. Vasodilation : decrease blood pressure

d. Decrease salt intake : decrease blood pressure

e. Decrease blood volume : decrease blood pressure

f. Vasoconstriction : increase blood pressure

g. Increase peripheral resistance:  increase blood pressure

h. Increase salt intake:  increase blood pressure

i. Increase blood volume : increase blood pressure

j. Increase water reabsorption: increase blood pressure

Explanation:

  • Total peripheral resistance: This term refers to the resistance offered by the vascular system to the blood flow.  This resistance is a result of the friction between the blood and the vessel's walls. In other words, it is the opposition of the vessels to blood flow. The total peripheral resistance is the summary of all the bloody circuit resistances in the body. Those mechanisms that induce vasoconstriction conduce to an increase in total peripheral resistance, while mechanisms that induce vasodilation provoke a decrease in total peripheral resistance.    
  • Blood pressure: This term refers to the strength applied by the blood against the vessel walls as it flows.  This pressure is determined by the bombed blood strength and the volume as well as by the vessel size and flexibility. Blood pressure changes continuously according to the activity, temperature, diet, emotional state, among others.    
  • Salt ingestion causes an increase in plasmatic osmolarity, stimulates thirst, and hence, water ingestion. Sodium retains water, expanding the blood volume and causing an increase in vessel pressure.
  • The antidiuretic hormone, also known as vasopressin hormone, is released by changes in serum osmolarity or blood volume. Its function is to keep homeostasis and make kidneys conserve or keep water by concentrating urine and by reducing its volume. By these actions, the antidiuretic hormone stimulates water reabsorption, according to the organism´s needs.
  • Kidneys control blood pressure in many ways. If the pressure is elevated, kidneys produce the loss of salt and water, normalizing arterial pressure. But if pressure is low, kidneys conserve water.          
3 0
3 years ago
Emperor penguins use a huddling behavior to conduct heat efficiently. Similarly, honeybees conduct heat within their hives by hu
olya-2409 [2.1K]
<h2>Emperor penguins</h2>

Explanation:

  • Evaporative and convective is Right answer.
  • Fish and krill make up the main part of their eating routine alongside <em>squid and scavangers.</em> Like other penguin species, <em>Emperor Penguins </em>have an unpleasant and spiky tongue which causes them <em>when attempting to eat tricky fish.  </em>
  • It  is the biggest of 17 types of penguin at 1.15 m (45 in.) tall.
  • It is likewise the main creature to occupy the open ice of Antarctica throughout the winter.  
  • The penguin is the tallest and heaviest of all living penguin species.
  • A gathering of penguins is known as a province, a rookery or a Waddle, yet these terms are for a gathering of penguins ashore.
  • A group of  of penguins drifting in the sea is known as a  raft.
8 0
3 years ago
What is happening when the angle of the sun hitting the planet during our winter solstice when is that?
Ivan

Answer:The summer solstice occurs at the moment the earth's tilt toward from the sun is at a maximum. Therefore, on the day of the summer solstice, the sun appears at its highest elevation with a noontime position that changes very little for several days before and after the summer solstice.  The summer solstice occurs when the sun is directly over the Tropic of Cancer, which is located at 23.5° latitude North, and runs through Mexico, the Bahamas, Egypt, Saudi Arabia, India, and southern China.  For every place north of the Tropic of Cancer, the sun is at its highest point in the sky and this is the longest day of the year.

The winter solstice marks the shortest day and longest night of the year. In the Northern Hemisphere, it occurs when the sun is directly over the Tropic of Capricorn, which is located at 23.5° south of the equator and runs through Australia, Chile, southern Brazil, and northern South Africa.

Explanation:

3 0
3 years ago
A golfer hits a golf ball with a club. The mass of the ball is 0.05 kg. The ball accelerates at 2000 m/s2. What is the net force
Firdavs [7]

Hello!

\large\boxed{F = 100N}

Use the equation F = m · a (Newton's Second Law) to solve:

We are given the mass and acceleration, so plug these values into the equation:

F = 0.05 · 2000

F = 100 N

5 0
3 years ago
When rocks are broken by year and pressure, chemical weathering has taken place
raketka [301]
Yes that is true I think lol :D
8 0
4 years ago
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