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38 Cards in this Set

  • Front
  • Back
a biological catalyst which increases rate of reaction
Made up of atoms
Chemical Composition of Enzymes
made up of proteins --> made up of polypeptide chains --> composed of amino acids joined by polypeptide bonds
Lock and key model
suggest that substrates fit exactly into the active site of the enzyme
what is PH
a measure of the acidity or alkilinity of a substance
What makes a substance acidic?
Hydrogen Ions
What affects enzyme function?
temperature increase --> enzyme activity increases
PH Scale
0 Acidic --> 7 neutral --> 17 Basic
is the process by which organisms maintain a relitively stable internal environment
can be either muscles or glands. Muscles bring movement, glands bring change in chemical secretion
Carbon Dioxide in blood
carbonic acid and then into hydrogen carbon ions
Oxygen in blood
Water in blood
the solvent of plasma
transported directly to plasma
Nitrogenous wastes in blood
changed into urea
carry blood away from the heart
an extension of the inner layers of the arteries
carry blood back to the heart
What happens in the Kidneys?
salt and water levels are regulated
- all urea is removed
- toxins are excreted into urine
transport of water is passive and depends on transpiration. Water is drawn up the xylem tubes to replace the loss
evaporation of water from the leaf cells through the stomates
Diffusion of water
caused by low concentration of water at the roots
binding together of water molecules
water molecules that stick to the sides of the xylem tubes
In the Phloem Translocation occurs
it is the movement of organic materials such as sugars, amino acids and hormones. Transported both up and down
Size of red and white blood vessels
White= 12-15 um
function: defend against disease
Red= 6-9um
Function: transport of oxygen
Pulse oximetre:
measures 02 levels
- peg like device that sits on your finger
infection fighting parts of the blood plasma given to people who have difficulties fighting infections
Active transport
uses energy to transport substances across a membrane
Passive transport
is the movement of substances across a membrane
Nefron Structure
Bowmans capsule is connected to the proximal tubule leading to the loop of henle, which then connects to the ditil tubule and all joins to the bladder
What are nephrons surrounded by?
Where does filtration occur?
Within the bowmans capsule in the glomerulus
substances the body can reuse are reabsorbed into the capillaries surrounding the nephron
is the proces by which the body activley transports substances from the blood to the nephron
ADH, Anti diuretic hormones
controlls the reabsorption of water by adjusting permeability of the collecting ducts
produced and released by the adrenal glands it controls the amount of salt in the blood
is the maintinance of metabolic and physiological functions in response to Enantiostas variations in the environment