A fruit fly Drosophila melanogaster showing  three point test cross  st+-e+-ss+  was crossed with triplet recessive mutant st-e-ss. The F1 hybrid  was the backcross with the recessive mutant and the phenotype recorded as follows;

The distance in map unit (mu) between  st+  to  e+ and e+ to ss+ is

TLS Online TPP Program

#Question id: 11024

#Unit 7. System Physiology – Animal

A 55-year-old man has been diagnosed with Stokes-Adams syndrome. Two minutes after the syndrome starts to cause active blockade of the cardiac impulse, which of the following is the pacemaker of the heart?

TLS Online TPP Program

#Question id: 11022

#Unit 7. System Physiology – Animal

A 55-year-old man had the following EKG recorded at his doctor’s office during a routine physical examination.

What is his diagnosis?

TLS Online TPP Program

#Question id: 11014

#Unit 7. System Physiology – Animal

What is the normal QT interval?

TLS Online TPP Program

#Question id: 11013

#Unit 7. System Physiology – Animal

What is the heart rate in the following EKG?

TLS Online TPP Program

#Question id: 11006

#Unit 7. System Physiology – Animal

Which of the following conditions will result in a dilated, flaccid heart?

TLS Online TPP Program

#Question id: 11001

#Unit 7. System Physiology – Animal

In which phase of the ventricular muscle action potential is the potassium permeability the highest?