The fetus receives all its nutrients and oxygen through the placenta. Therefore, fetal lungs are non-functional, as far as pulmonary circulation is concerned. It only needs to receive enough blood to sustain growth. There are a couple of features in the fetal cardiovascular system to shunt the blood away from the lungs and only provide enough for sustenance and keep most blood in general circulation. Which two structures in fetal circulation aid in bypassing the pulmonary circulation

From which layer of atmosphere is the top layer of the thermosphere? a.troposphere b. stratosphere c.mesosphere d.exosphere hurry me i will give a braineilst

Consider the equation s + o2 ? so2. what is the product? question 3 options: s so 2 s + so 2 o 2

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.