Hole's Human Anatomy & Physiology (Shier), 12th Edition

Ph.I.L.S. 3.0 Quizzing 25: Ph.I.L.S. 3.0 Quizzing

Ph.I.L.S. 3.0 Quizzing

1
The original line tracing (now gray) consists of:
A)an initial inward current (in the yellow area) and then an outward current (in the green area).
B)an initial outward current (in the yellow area) and then an inward current (in the green area).
C)no currents, because none are shown in the original line tracing.
2
Which current was abolished when TEA is injected into the axon?
A)The initial inward current.
B)The (later) outward current.
C)No currents were affected by TEA.
3
If TEA blocks voltage-gated potassium channels in the squid giant axon, which cations flow out of the cell and carry the (later) outward current?
A)Sodium.
B)Potassium.
C)Calcium.
4
The application of TTX to the solution bathing the axon changed the line tracing by abolishing:
A)the initial inward current.
B)the (later) outward current.
C)no currents were affected by TEA.
5
If TTX blocks the voltage-gated sodium channels in the squid giant axon, which cation flows into the cell and carries the (early) inward current?
A)Potassium.
B)Calcium.
C)Sodium.
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe

Please read our Terms of Use and Privacy Notice before you explore our Web site. To report a technical problem with this Web site, please contact the Web Producer.