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3 years ago

What can cause attention deficit hyperactivity disorder (ADHD)?

2 answers:

8 0

The exact cause of attention deficit hyperactivity disorder (ADHD) isn't known. But it may run in families. Ongoing research is focused on finding the genes that cause a person to be likely to get ADHD. A mother's use of cigarettes, alcohol, or other drugs during pregnancy may increase the risk for ADHD.

gayaneshka [121]3 years ago

8 0

Answer:

The exact cause of ADHD is not well known, however, some of the factors, which can lead to the condition. These are as follows:

1. Genetic factors, as ADHD seems to run in families.

2. Chemical imbalance taking place in the brain.

3. Infections, poor nutrition, smoking, substance abuse at the time of pregnancy, and drinking.

4. The toxins like lead can influence the development of the brain of a child.

5. A brain disorder or brain injury, that is, destruction to the frontal part of the brain can result in the issues associated with ADHD.

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3 years ago

50 points for anyone who answeres properly. How does a structure of a triglyceride differ from the reaction of fructose?

Nimfa-mama [501]

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Fatty Acids

A lipid is an organic compound such as fat or oil. Organisms use lipids to store energy, but lipids have other important roles as well. Lipids consist of repeating units called fatty acids. Fatty acids are organic compounds that have the general formula CH3(CH2)nCOOH" role="presentation" style="display: inline-table; font-style: normal; font-weight: normal; line-height: normal; font-size: 17.6px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">CH3(CH2)nCOOHCH3(CH2)nCOOH, where n" role="presentation" style="display: inline-table; font-style: normal; font-weight: normal; line-height: normal; font-size: 17.6px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">nn usually ranges from 2 to 28 and is always an even number. There are two types of fatty acids: saturated fatty acids and unsaturated fatty acids.

Saturated Fatty Acids

In saturated fatty acids, carbon atoms are bonded to as many hydrogen atoms as possible. This causes the molecules to form straight chains, as shown in the figure below. The straight chains can be packed together very tightly, allowing them to store energy in a compact form. This explains why saturated fatty acids are solids at room temperature. Animals use saturated fatty acids to store energy.

Figure 14.2.1" role="presentation" style="display: inline-table; font-style: normal; font-weight: normal; line-height: normal; font-size: 16px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">14.2.114.2.1: Structures of saturated and unsaturated fatty acids.

Unsaturated Fatty Acids

In unsaturated fatty acids, some carbon atoms are not bonded to as many hydrogen atoms as possible due to the presence of one or more double bonds in the carbon chain. Instead, they are bonded to other groups of atoms. Wherever carbon binds with these other groups of atoms, it causes chains to bend (see figure above). The bent chains cannot be packed together very tightly, so unsaturated fatty acids are liquids at room temperature. Plants use unsaturated fatty acids to store energy.

Figure 14.2.2" role="presentation" style="display: inline-table; font-style: normal; font-weight: normal; line-height: normal; font-size: 16px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">14.2.214.2.2: Saturated fatty acids have only single bonds while monounsaturated fats have one double bond and polyunsaturated fats have more than one double bond.

Lipids and Diet

Unsaturated fat is generally considered to be healthier because it contains fewer calories than an equivalent amount of saturated fat. Additionally, high consumption of saturated fats is linked to an increased risk of cardiovascular disease. Some examples of foods with high concentrations of saturated fats include butter, cheese, lard, and some fatty meats. Foods with higher concentrations of unsaturated fats include nuts, avocado, and vegetable oils such as canola oil and olive oil.

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3 years ago

Need help on both #19 and #20 please

ziro4ka [17]

This is the answer to question 19. If it’s not clear, send me a message.

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4 years ago

Silver nitrate has lattice energy of -820kj/mol and a heat of solution of +22.6 kj/mol. calculate the heat of hydration for silv

Genrish500 [490]

Lattice energy = -820 kJ/mole

Heat of solution = +22.6 KJ/mole

Lattice breakdown is and endothermic reaction during the formation of solution

And hydration is an exothermic reaction as ions interact with solvent molecules

By using the formula,

Enthalpy of solution = Lattice energy + hydration energy

Now put the values and calculate,

+22.6 kj/mole = + 820 kj/mole + hydration energy

Hydration energy = 22.6 Kj/mole – 820 Kj/mole

Hydration energy= -797.4 Kj/mole

3 0

4 years ago