08 Jun BIO 20B – Filtrate is forced out of capillaries in the
Question
1)Filtrate is forced out of capillaries in the _________ by ________________.
a.Proximal tubule,osmosis
b.Glomerulus, blood pressure
c.Distal tubule, blood pressure
d.Glomerulus, osmosis
2)The purpose of the loop of Henle is
a. To establish the concentration gradient inside the nephron
b. To establish the concentration gradient within the medulla
c. To establish the concentration gradient within the collecting duct d. To establish the concentration gradient within proximal tubule
e. To establish the concentration gradient within the distal tubule
3)When one subunit of hemoglobin binds to one O2 molecule_________.
a. it changes the amino acid structure which makes it easier for other O2 molecules to bind.
b. it changes the affinity of the hemoglobin molecule which makes it easier for red blood cellsto bind O2. c. it changes the shape of hemoglobin molecule which causes it to bind O2 more easily.
d. it causes the oxy-Hb curve to shift to the right which decreases its affinity for O2.
e. None of the above
4)Blood velocity in the capillaries is low because
a. blood will naturally flow more slowly in narrow tubes.
b. the total cross sectional area of the capillary beds is much greater than the total cross sectional area of the arteries and arterioles.
c. precapillary sphincters contract and can slow the blood down before it reaches the capillary bed.
d. a&c
e. b&c
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