Countercurrent flow in the respiratory systems of
fish is a mechanism that accounts for
a. oxygen uptake by blood capillaries in the gills.
b. ventilation across fish gills.
c. the transport of blood from the gills to the fish’s
heart.
d. the transport of blood from the heart to the fish’s
main body mass.
e. the flow of blood in gills as opposed to the flow
of blood in the main body mass of fish.
Answer: a
You might also like to view...
In establishing paternity by DNA fingerprinting, what proportion of microsatellite repeat alleles in a child come from the father?
A) only those on the X chromosome B) 1/4 C) 1/2 D) 3/4
Which is true of the following reaction: Pi + ADP -> ATF?
A. It has a change in free energy that is less than 0. B. It has a change in free energy that is greater than 0. C. It can be used to drive endergonic reactions. D. It yields energy. E. It has a change in free energy that is greater than 0, and hence can be used to drive endergonic reactions.
When conducting descriptive research, a scientist primarily uses:
a. control data. b. data. c. experiments. d. observational data. e. experimental data.
The ventral body cavities include
a. the thoracic cavity. b. the cranial cavity. c. the abdominopelvic cavity. d. both a and c.