1. Science
  2. Biology
  3. question 1 a moderate increase in extracellular potassium will increase...

Question: question 1 a moderate increase in extracellular potassium will increase...

Question details

Question 1

  1. A moderate increase in extracellular potassium will

Increase heart rate due to a more negative EK

Decrease heart rate due to a more negative EK

Increase heart rate due to a less negative EK

Decrease heart rate due to a less negative EK

Question 2

  1. Apply Atropin will directly

Decrease parasympathetic innervation and increase heart rate

Increase parasympathetic innervation and decrease heart rate

Decrease sympathetic innervation and increase heart rate

Increase sympathetic innervation and decrease heart rate

Frog ECG is recorded using

An electrical stimulator

Three wires including the one that is connected to the hook

A force transducer

Three wires and a force transducer

Question 4

  1. How would you differentiate atrial contractions from ventricular contractions?

A.

Observe the heart beating and tap the table to label it

B.

From the size of the contractions

C.

Correlate it with the electrical trace, if the electrical trace is typical.

D.

Both A and C

Question 5

  1. In this week's experiment, _________signal(s) will be recorded to study the frog cardiac functions.

mechanical (contractile)

electrical (ECG)

both mechanical and electrical

blood flow

Question 6

  1. In this week's experiment, the heart is hooked at the ________

either atrium or ventricle

ventricle

atrium

sympathetic/increase

parasympathetic/decrease

Sympathetic/decrease

parasympathetic/increase

Question 8

  1. The frog heart can be slowed or stopped by over stimulation of the vagus nerve. When apply ACh to the heart, if the frog heart stop beating, you should

Wash the heart with warm Ringers

Apply a few drops of Isuprel

Massage the heart

All of the above

Observe the trace and do nothing

Question 9

  1. The pacemaker in the frog heart is the __________ and the pacemaker in the mammalian heart is the ________

AV, SA node

SV, SA node

SA, SV node

SA, SA node

Question 10

  1. Which of the following statements is TRUE regarding the frog heart

There is no autorhythmic cells found in the frog ventricle.

Oxygenated and deoxygenated blood are mixed completely inside the frog ventricle

There are two atria and two ventricles.

Deoxygenated blood flows to the frog lungs and skin.

Solution by an expert tutor
Blurred Solution
This question has been solved
Subscribe to see this solution