<span>Depending upon the nature of reaction, enthalpy changes ( heat of reaction ) accompanying chemical reaction are expressed in different ways.</span>
Answer:
Because she is overweight, estimating her BMR must be calculated by multiplying the average weight within her healthy weight range. Tonya weighs 151 pounds and would like to get down to a healthy weight of 131 pounds. The average of this is 141 pounds. Her estimated BMR is then 141 lbs × 10, which is 1410 calories.
Answer:
Varicose veins can best be described as veins cannot prevent the backflow of blood.
Explanation:
Varicose veins are a manifestation of venous insufficiency or peripheral vascular insufficiency.
Veins are blood vessels that, unlike arteries, are not able to contract, so they depend on gravity, muscle contractions and a system of valves to be able to carry blood to the heart.
<u>When the venous valves do not work, the blood is not transported properly, backflow occurs and is retained, producing dilation of the vein walls, which is characteristic of varicose veins</u>. In this case, veins cannot prevent the backflow of blood.
The other options are not correct because:
- <em>Varicose veins do not lose their ability to transport blood.
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- <em>Veins cannot be used to transport blood from the heart.
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- <em>Failure to adequately transport waste to the heart does not apply in this case.</em>
