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AnnZ [28]
3 years ago
5

Blood vessels that contain valves and rely on skeletal muscles to move blood are called:

Biology
2 answers:
Sedaia [141]3 years ago
7 0

Answer:

<em>B. Veins</em>

Explanation:

Veins carry blood relying on the action of the skeletal muscle as the body moves. Veins have valves so blood flows in only one direction. Valves are not present in arteries. Arterioles is small and contains valves to prevent backflow of blood but does not rely on skeletal muscles. Capillaries don’t have any valves. The correct answer would be veins.

Alexeev081 [22]3 years ago
4 0

Answer:

veins because they carry low pressured blood due to which there is more chance for backward flow of blood and to prevent that they contain valves.

<em>hope</em><em> </em><em>it</em><em> </em><em>helped</em><em> </em><em>uh</em><em>.</em><em>.</em>

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Surfactant helps to prevent the alveoli from collapsing by
Y_Kistochka [10]

Answer:

The correct answer will be- by lowering the surface tension at air/liquid transition.

Explanation:

Pulmonary surfactant is the mixture of proteins and lipids produced by the type II epithelial cells.  

The surfactant is selected into the alveolar sacs where the surfactant reduces the surface tension of the air/liquid interface to 1 mN/m. The lipid content of the surfactant called dipalmitoylphosphatidylcholine or DPPC forms a surface film which lowers the surface tension.

This power surface tension reduces the work of breathing and thus prevent the alveolar sac from rupture or collapse.

Thus, by lowering the surface tension at air/liquid transition is the correct answer.

7 0
4 years ago
Is natural selection the only component of darwin's theory of evolution
djverab [1.8K]
Answer:
Yes
Explanation:
It talks about the natural selection of small, inherited variations that increase the individuals ability to compete survive and reproduce
6 0
3 years ago
9. Which of the following is not a part of the peer review process or its result? A. Ensuring that work meets the standards of t
Tom [10]

Correct answer: C). Making sure that a piece of work is correct and includes bias

The peer review process can be defined as the process of exposing an author's research or ideas or results to be verified by the others who are expert in that field. Its main function is to encourage an author to meet the high standards of discipline in order to ensure that unacceptable results, interpretations or personal views are not published without the expert view.

Any scientific work should not contain any biasness as they may affect the validity of results. Hence, the scientific work does not have any bias.

Hence, the correct answer would be option C.


7 0
3 years ago
The sex of the child is determined by the male parent. Justify your statement.
nevsk [136]
Male has sex chromosomes: One X + one Y
Female has sex chromosomes: Two X

So, Female must contribute by one X chromosome, but male can contribute either by X or Y, if he sends, X chromosome, then Female (Girl) will form, but if he sends Y chromosome, then Male (Boy) will form

Hope this helps!
3 0
3 years ago
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Free_Kalibri [48]

Answer: water and light

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Abiotic factors are non living things that affect biotic factors for an example plants need water and sunlight to live which are abiotic factors

6 0
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