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Vaselesa [24]
3 years ago
11

The anatomy of the intrinsic conduction system causes contraction of the ventricles to begin at the apex and move superiorly. Wh

y is this important? The anatomy of the intrinsic conduction system causes contraction of the ventricles to begin at the apex and move superiorly. Why is this important? because the Purkinje fibers conduct action potentials away from the heart apex because the AV bundle is the only electrical connection between the atria and the ventricles
Biology
1 answer:
Anni [7]3 years ago
3 0
<h2>Blood is forced upward and toward</h2>

Explanation:

  • In the cardiovascular cycle, the autonomous withdrawal and unwinding of heart cells are facilitated through the movement of the heart's characteristic conduction framework and by cell-to-cell correspondence by means of the hole intersections in the myocardial cells themselves.  
  • The natural conduction arrangement of the heart comprises of nodal tissue, whose specific cells have both apprehensive and solid qualities. Nodal tissue is restricted in explicit areas of the heart.

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2. In polar regions, phytoplankton.
natka813 [3]

Answer:

b. thrive during the summer, when sunlight increases

Explanation:

Phytoplankton production is highly associated with latitude and season. In polar regions, phytoplankton production is reduced to the summer (and eventually spring) season. In consequence, the zooplankton that eats phytoplankton only can survive during the spring and summer seasons. On the other hand, in tropical areas, there exists a nearly constant phytoplankton production all year round.  

6 0
3 years ago
What were the two driving forces that drove the evolution in the variation of skin color
yarga [219]

Answer:

The correct answer is: geography and UV radiation.

Explanation:

Skin variation occurred thanks to evolution, and was driven as a consequence of the geographical location of different populations of humans.

The humans that lived in hot and sunny places, closer to the equator, where much more exposed to the sun's ultraviolet radiation. In order to survive the amount of UV lights that they were exposed to, new humans in those regions were being born with a darker skin tone, which was rich in melanin (a brown pigment that protects us from the sun radiation).

Contrary to these humans that lived in the tropical areas, the humans that populated the areas that were closer to the poles, developed much lighter skin as a result of lower amounts of melanin in their skin. Since sun exposure in the poles is very limited, humans needed to receive as much as they could for the production of Vitamin D, and thus, their skins got lighter and less protected.

8 0
4 years ago
Which biological level(s) of organization is compromised of only living things? multiple choice
Vilka [71]

Answer:

Population

Explanation:

population is a group of organisms of the same species who inhabit the same particular geographical area

8 0
3 years ago
What is a comparative study of the similarities and differences in the embryos of different species?
kolezko [41]

Answer:

first the ways of adaptation and behaviour of plant

3 0
3 years ago
Compare and contrast. what three elements do all macromolecules share? explain how the chemical properties of lipids, nucleic ac
inn [45]

All macromolecules have carbon atom and the hydrogen atom.

<h3>What are macromolecules?</h3>

The term macromolecules refers to the molecules that are composed of smaller units. These smaller units are called monomers. The macromolecules that we are concerned with here are the macromolecules that could be found in the human body.

The biological macromolecules are often very large as we can see. This is because the number of units that are joined to form the macromolecules are usually very much. There are thousands of monomer molecules that are joined together to give proteins, lipids, carbohydrates and the nucleic acid macromolecules.

All the macromolecules have the carbon atom and the hydrogen atom. These are found across all the macromolecules. The carbohydrates are reducing sugars thus they contain the carbonyl bond. The carbonyl group is absent in lipids, nucleic acids, proteins, and amino hence they do not undergo carbonyl reduction reactions.

Learn more about macromolecules:brainly.com/question/15237842

#SPJ1

3 0
1 year ago
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