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Furkat [3]
3 years ago
14

The __________ valve prevents backward flow of blood into the left ventricle.

Biology
1 answer:
GuDViN [60]3 years ago
4 0
The aortic valve prevents backward flow of blood into the left ventricle.
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Which of the following is not the name of an air mass?
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What the definition of reproductive cycle
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Identify and describe two functions of the vertebrae integumentary system
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The heat from the bonfire is transferred to the student's hands through the process of
Akimi4 [234]
The heat from the bonfire is transferred to the student's hands mainly, but not exclusively, through the process of RADIATION.


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Convection is the heat transferred by the movement of the fluids (liquids ang gases). In some extent this happens in this case, but it is not the dominant effect becasue air is not a very good conductor. Specially if there is not much air movement (wind).



Thermal radiation is carried out by electromagnetic waves. When there is a source of intense heat, like the fire, the heat is propagated by radiation.


Then really, the heat from the bonfire gets to the student's hands by convection and radiation, but as fire is very intense (its temperature is very high), and as long as the air is calmed, the dominant process is radiation.  If there is wind, convection starts to be important.
6 0
3 years ago
At low temperatures, a particular enzyme catalyzes a reaction, but at a slow rate. At high temperatures, the enzyme is completel
Orlov [11]

At the low temperature, a particular enzyme catalyses a reaction best explains temperature affects the function of this enzyme.  

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Enzymes are those catalysts which is generally proteins through some RNA molecules as enzymes too.  The activation energy of reaction of Enzymes lower is required amount of energy which is needed for occurring the reaction.

Temperature, pH and concentration affect the Enzyme activity. The raising of temperature generally speeds up the reaction. Due to high temperature enzyme to lose its shape and stop working.  The part of enzyme where substrate bind is called the active site.  

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3 years ago
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