Answer:
Vitamin C is one of the most important ingredient of skin as it play a key role in synthesis of collagen necessary for elasticity of skin.
Derivatives of vitamin C:
Following are derivatives of vitamin C used in medication for skin wrinkling and achne:
<span>1. Ascorbyl-6-palmitate
2. Magnesium ascorbyl phosphate
</span>
Derivatives of vitamin A:
There are four derivatives of vitamin A use in treating skin wrinkling, these are:
1.Retinol
2. Retinyl Palmitate
3. Retinaldehyde
3. Retinyl Retinoate
Answer:
The nurse should administer 2 ml each day
Explanation:
According to the prescription, <em><u>12 mg of betamethasone</u></em> should be given daily for three days.
The prescription also says that betamethasone comes in 6 mg/mL per vial. Therefore, to give 12 mg of betamethasone, 2 vials (each vial having 1 ml) of betamethasone must be administered by the nurse.
The body system that directly provides for this demand is the circulatory system. When you exercise, the circulatory and muscle system cooperate, in order to meet the increased needs for strength and energy. The circulatory system involves the network which delivers blood to every part of your body. This flowing of blood ensures that the tissues are oxygenated and rich in necessary nutrients. During exercise, more blood flows to and from your muscles, in order to deliver the necessary amounts of oxygen to complete the aerobic respiration.
A closed system is a system that makes no physical or chemical exchanges with its environment. Of these systems provided as choices (tree, human, clock, car), only a clock does not make exchanges with the environment, except for energy.
Therefore, of that list, only a clock would be a closed system.
Hope that helped! =)
