Molecules that dissociate in water and release hydrogen ions (H+). Acidic solutions have more H+ ions than OH ions. Examples of acids include vinegar, tomato juice, lemon juice and coffee.

Molecules that either release hydroxide ions (OH) or take up hydrogen ions (H+). If a strong base, such as sodium hydroxide (NaOH), is added to water, it dissociates. Examples include milk of magnesia, baking soda, and am-monia.

A compound or combination of compounds, often weak acid or base + a related salt, that keeps pH of a solution within its normal limits. Buffers resist changes in pH because of their ability to take up excess hydroxide ions (OH) or hydrogen ions (H+).

Example of a buffer in the blood that protect against large changes in pH. Hemoglobin is the oxygen-carrying pigment of red blood cells that gives them their red color and serves to convey oxygen to the tissues.

Hydrogen bonds are weak electrostatic attractions between hydrogen and electronegative atoms, typically nitrogen or oxygen. By sharing electrons, Oxygen and both Hydrogens complete their outer shells. The resultant compound is water.

Sodium chloride and other molecules that interact by separating and dissociating into the water.

Non-polar molecules that can not separate and dissociate into the water.

Water molecules cling together due to hydrogen bonding, but flow freely as fluid.Water also used as lubricant where body surfaces interact with dry environment. Ex include tears, mucus in the lungs, throat, and nose, and sinovial fluid in the joints.

PH is negative logarithm of hydrogen ion concentration. PH Scale ranges strong acid- strong base 0-14, the lower no=higher acidity, the higher no=higher alkaline.Cell processes are middle of the scale between ph6-8. Most of food eat is acidic.

Polarity causes water molecules to attract one another as well as other charged (ionized) molecules Partial charges make the water molecule polarthe two hydrogen atoms act as positive poles and oxygen acts as a negative pole.

Water referred to as universal solvent because other polar (charged) molecules will dissolve in it. Therefore, when charged ions & molecules disperse in water, they move about, collide, & facilitate chemical reactions, both inside and outside our bodies.

temperature regulator

Water in our bodies helps to moderate temperature changes, just as ocean water heats or cools slowly. The numerous hydrogen bonds in water help it resist temperature changes because lots energy must be +or - to raise or decrease the temperature of water.

Help

Options

focusNode

Didn't know it?
click below

Knew it?
click below

Don't Know

Remaining cards (0)

Know

retry

shuffle

restart

0:00

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Mod1S1.2 LA Cell Com

Module 1 Section 1.2 Lesson A Cell Compounds

Question	Answer
acids	Molecules that dissociate in water and release hydrogen ions (H+). Acidic solutions have more H+ ions than OH ions. Examples of acids include vinegar, tomato juice, lemon juice and coffee.
bases	Molecules that either release hydroxide ions (OH) or take up hydrogen ions (H+). If a strong base, such as sodium hydroxide (NaOH), is added to water, it dissociates. Examples include milk of magnesia, baking soda, and am-monia.
buffer	A compound or combination of compounds, often weak acid or base + a related salt, that keeps pH of a solution within its normal limits. Buffers resist changes in pH because of their ability to take up excess hydroxide ions (OH) or hydrogen ions (H+).
hemoglobin	Example of a buffer in the blood that protect against large changes in pH. Hemoglobin is the oxygen-carrying pigment of red blood cells that gives them their red color and serves to convey oxygen to the tissues.
hydrogen bonding	Hydrogen bonds are weak electrostatic attractions between hydrogen and electronegative atoms, typically nitrogen or oxygen. By sharing electrons, Oxygen and both Hydrogens complete their outer shells. The resultant compound is water.
hydrophilic	Sodium chloride and other molecules that interact by separating and dissociating into the water.
hydrophobic	Non-polar molecules that can not separate and dissociate into the water.
lubricant	Water molecules cling together due to hydrogen bonding, but flow freely as fluid.Water also used as lubricant where body surfaces interact with dry environment. Ex include tears, mucus in the lungs, throat, and nose, and sinovial fluid in the joints.
pH	PH is negative logarithm of hydrogen ion concentration. PH Scale ranges strong acid- strong base 0-14, the lower no=higher acidity, the higher no=higher alkaline.Cell processes are middle of the scale between ph6-8. Most of food eat is acidic.
polarity	Polarity causes water molecules to attract one another as well as other charged (ionized) molecules Partial charges make the water molecule polarthe two hydrogen atoms act as positive poles and oxygen acts as a negative pole.
solvent	Water referred to as universal solvent because other polar (charged) molecules will dissolve in it. Therefore, when charged ions & molecules disperse in water, they move about, collide, & facilitate chemical reactions, both inside and outside our bodies.
temperature regulator	Water in our bodies helps to moderate temperature changes, just as ocean water heats or cools slowly. The numerous hydrogen bonds in water help it resist temperature changes because lots energy must be +or - to raise or decrease the temperature of water.

Created by: sarabarbot

Popular Biology sets

Genetics: Monohybrid, Dihybrid, & Non-Mendelian

Unit 2- Requirements of Life

Evidence of Evolution

"Know" box contains:
Time elapsed:
Retries: