The human core body temperature is normally 37°c no matter what the temperature of the surroundings or the
activity level of an individual. to reduce the body temperature, sweating occurs. sweat is mostly water with some
salt. it is produced by the sweat glands and pours out onto the surface of the skin. how does sweating to cool
and regulate body temperature?
the increased salt concentration of the body's cells maintain a lower
body temperature.
water has a high heat of vaporization; the human body can dissipate
excess heat by the evaporation of sweat.
the low specific heat of water allows it to readily evaporate into the
atmosphere, quickly cooling your body.
water's cohesive properties cause water molecules to stick together
requiring the body's thermal energy to evaporate sweat into the air.

Penicillin is hydrolyzed and thereby rendered inactive by penicillinase (also known as β-lactamase), an enzyme present in some resistant bacteria. the mass of this enzyme in staphylococcus aureus is 29.6 kd. the amount of penicillin hydrolyzed in 1 minute in a 10-ml solution containing 10-9 g of purified penicillinase was measured as a function of the concentration of penicillin. assume that the concentration of penicillin does not change appreciably during the assay. penicillin(μm) amount hydrolyzed(nmol) 1 0.11 3 0.25 5 0.34 10 0.45 30 0.58 50 0.61 (a) plot v0 versus [s] and 1/v0 versus 1/[s] for these data. does penicillinase appear to obey michaelis-menten kinetics? if so, what is the value of km? (b) what is the value of vmax? (c) what is the turnover number of penicillinase under these experimental conditions? assume one active site per enzyme molecule.