PBS Unit 2 Test Study Guide

List similarities of Type II and Type II Diabetes

Similarities
- insulin is unable to process glucose
- incurable
- warning signs: increased thirst, urination, weight loss, blurred vision
Difference
-Type 1: body cannot produce enough insulin because beta cells in pancreas are attacked by body's own cell

negative feedback loop (definition)

the output of the system shuts off the original stimulus or reduces its intensity

positive feedback loop (definition)

feedback causes level of a variable to change in same direction of initial change

Examples of negative feedback loop

glucose and body temperature

Examples of positive feedback loop

childbirth and blood clotting

a substance that changes to indicate the presence of a particular compound or type of compound

indicator

Benedict solution indicates

simple sugars

Color change to Benedict solution

light blue to green, yellow, orange or red

Lugol's Iodine indicates

starch

Color change of Lugol's Iodine

yellow or light brown to dark purple or black

Biuret solution indicates

protein

Color change of Biuret

light blue to purple

Serving size importance

to properly compute calories in each portion

Calories importance

-provide energy to body
-determines weight gain/loss/mainteance

Total Fat importance

-regulate hormones

Unsaturated Fat importance

-make cell membranes
- insulate neurons
- lowers risk for cardiovascular disease and cancers

Saturated Fat Importance

-increases level of LDL cholesterol
-can lead to clogged arteries or coronary disease

Trans Fat Importance

-wreck havoc on body's ability to regulate cholesterol
- increases bad cholesterol

Cholesterol Importance

-gives flexibility to cell membranes
- makes steroid hormones

Sodium Importance

- control blood pressure and blood volume
- high sodium = high blood pressure

Carbohydrate Importance

preferred source of energy in human body

Fiber Importance

absorbs water and eases digestion

Sugar Importance

- excessive amounts linked to incidences of type 2 diabetes, obesity, and tooth decay

Protein importance

-make structures (muscle, hair), enzymes, peptide hormones
-source of energy

Calcium importance

strong teeth and bones

Iron importance

transport oxygen to cells

Vitamin A importance

helps vision, tissue growth and healthy skin

Vitamin E Importance

helps healthy skin, teeth, bones and blood vessels

covalent bond

bonds formed by sharing of electrons (ex: H20)

a chemical bond resulting from the attraction

ionic bond

two or more atoms held together by covalent bonds

molecule

a substance consisting of two or more elements in a fixed ratio

compound

Carbohydrate's function

provide the body with energy and are easily broken down by the body

Protein's Function

build, maintain and repair tissue in body

Lipid's Function

- make up cell membrane
- provide cell structure
- provide insulation
- store energy for body

Nucleic Acid's Function

stores and carries genetic information

Breaking down complex molecules by the chemical addition of water

hydrolysis

chemical reaction in which two molecules are bonded together with the removal of a water molecule.

dehydration synthesisA

List symptoms of diabetes

increased thirst, peeing alot, blurred vision, weight loss, slow wound healing

Long term effects of diabetes

pancreas may shut down (Type 2)

Short term effects of diabetes

diet change, exercise requirements

Treatment of Diabetes

-insulin injections (Type 1)
-weight loss
-blood sugar monitoring

Prevention of diabetes

-maintain healthy weight
- exercise and diet

Isotonic effect on cells

- water goes in both directions
- cell is fine

Hypotonic effect on cells

- water moves into cells
- cells become full

Hypertonic effect on cells

- water moves out of cells
- cell dehydrates and implodes

Explain foot complications that occur with diabetes

- neuropathy (inability to feel pain, heat and cold)
- poor circulation
- amputation

Explain skin complications that occur with diabeties

- slow healing
- wounds, blisters

Explain ear complications that occur with diabetes

hearing loss

an organic monomer which serves as a building block of proteins

amino acid

a amount of heat energy required to raise the temperature of 1g of water by 1�C. This is usually used to indicate the energy content of food.

calorie

a sugar in the form of a monosaccharide, disaccharide or polysaccharide

carbohydrate

an attractive force that holds together atoms, ions, or groups of atoms in a molecule or compound

chemical bond

a substance (as a dye) used to show visually usually by its capacity for color change, the condition of a solution with respect to the presence of free acid or alkali or some other substance

chemical indicator

chemical transformation or change; the interaction of chemical entitles

chemical reaction

a substance consisting of two or more elements in a fixed ratio

compound

a type of chemical bond in which 2 atom share one or pairs of valence electrons

covalent bond

a chemical reaction in which two molecules are bonded together with the removal of a water molecule

dehydration synthesis

a double sugar molecule made of two monosaccharides bonded together through dehydration synthesis

disaccharide

the smallest particle of a substance that retains all the properties of the substance and is composed of one or more atoms

element

a protein hormone secreted by pancreatic endocrine cells that raises blood glucose levels; an antagonistic hormone to insulin

glucagon

a monomer of carbohydrate, simple sugar

glucose

a test of the body's ability to metabolize glucose that involves the administration of a measured dose of glucose to the fasting stomach and the determination of blood glucose levels in the blood or urine at intervals thereafter and that is used especiall

glucose tolerance test

the maintenance of relatively stable internal physiological conditions (such as body temperature or pH of blood) in higher animals under fluctuating environmental conditions

homeostasis

a product of living cells that circulates in blood and produces a specific, often stimulatory effect on the activity of cells that often far from the source

horone

a chemical process that splits a molecule by adding water

hydrolysis

an excess of sugar in the blood

hyperglycemia

in comparing two solutions, referring to the one with a greater solute concentration

hypertonic

abnormal decrease of sugar in blood

hypoglycemia

in comparing 2 solutions, referring to the one with a lower solute concentration

hypotonic

a protein hormone secreted by the pancreas that is essential for the metabolism of carbohydrates and the regulation of glucose levels in the blood

insulin

a chemical bond resulting from the attraction between oppositely charged ions

ionic bond

having the same solute concentration as another solution

isotonic

one of a family of compounds including fats, phospholipids, and steroids that is insoluble in water

lipid

a type of giant molecule formed by joining smaller molecules which includes proteins, polysaccharides, lipids, and nucleic acids

macromolecule

the subunit that serves as the building block of a polymer

monomer

a single sugar molecule such as glucose or fructose, the simplest type of sugar

monosaccharide

a primary mechanism of homeostasis, whereby a change in physiological variable that is being monitored triggers a response that counteracts the initial fluctuation

negative feedback

a substance that is needed by the body to maintain life and health

nutrient

the movement of water across a selectively permeable membrane from an area of higher concentration to lower concentration

osmosis

a large molecule consisting of many repeating chemical units or molecules linked together

polysaccharide

feedback tens to magnify a process or increase it's output

positive feedback

a 3D polymer made of monomers of amino acids

protein

a substance that is dissolved in a solution

solute

the dissolving agent of a solution.

solvent

diabetes of a form that usually develops during childhood or adolescence and is charactered by a severe deficiency of insulin, leading to high blood glucose levels

Type 1 diabetes

Diabetes of a form that develops especially in adults an most often in obese individuals and that is characterized by high blood glucose resulting form impaired insulin utilization coupled with the body's inability to compensate for increased insulin prod

Type 2 diabetes