Practice Questions

TLS Online TPP Program

#Question id: 5841

How are the BRCA proteins and their genes implicated in breast cancer?

#Genetics

The BRCA proteins damage DNA by generating double-stranded breaks which can lead to cancer.
Cells become more susceptible to damage if the genes for these proteins are damaged.
BRCA proteins inhibit excision repair mechanisms.
BRCA proteins initiate recombination between non-homologous DNA sequences.

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TLS Online TPP Program

#Question id: 10981

#Physiology

Which of the following structures will have the slowest rate of conduction of the cardiac action potential?

TLS Online TPP Program

#Question id: 10982

#Physiology

If the S-A node discharges at 0.00 seconds, when will the action potential normally arrive at the epicardial surface at the base of the left ventricle?

TLS Online TPP Program

#Question id: 10983

#Physiology

If the S-A node discharges at 0.00 seconds, when will the action potential normally arrive at the AV bundle (bundle of His)?

TLS Online TPP Program

#Question id: 10984

#Physiology

Which of the following are caused by acetylcholine?

TLS Online TPP Program

#Question id: 10985

#Physiology

What is the membrane potential (threshold level) at which the S-A node discharges?