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Physiology 1. > Lab 4 Questions > Flashcards

Lab 4 Questions Flashcards

1
Q

What effect does the propanolol have on the heart function?

A

Beta receptor blocker.

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2
Q

What effect does the atropine have on the heart function?

A

Competitive antagonist of acetylcholine.

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3
Q

Which drug is a parasympathetic transmitter?

A

Acetylcholine

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4
Q

Which drug is a Na+/K+ ATPase blocker?

A

Strophantine

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5
Q

How can the change in the drug concentration in the nutrient solution be calculated?

A

Based on the

  • Flow rate of the drug administering
  • Concentration of the drug solution.
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6
Q

What does it mean that Propanolol is a sympathico-lyticum?

A

That it inhibits type B1 and B2 adrenoceptors

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7
Q

Where is Acetylcholine liberated/transported/formed from?

A

The synapses of the n. vagus

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8
Q

What does the Acetylcholine exerts?

A

Negative

  • chrono
  • bathmo
  • dromo
  • and inotropic effect on the heart through type 2 muscarinic receptors
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9
Q

What leads to irregeular heart beats(arrhythmia)?

A

Blocking of calcium channels after elicitation of spontaneous diastolic depolarization in the AV node is delayed.

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10
Q

What is it Strophantine do more specifically?

A

Increases the IC Na+ conc. and
Decreases the IC K+ conc. in the heart.

(A consequence of the increased IC Na+ conc. the IC Ca2+ conc. will increase as well)

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11
Q

Another effect Strophantine have?

A

Stimulation of the sarcoplasmic Ca2+ - ATPase -> responsible for Muscle relaxation.

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12
Q

What can happen if you overdose Strophantine?

A

May lead to AV block.

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13
Q

Pulse frequency?

A

Fast pulse can be distinguished during the pulse rate

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14
Q

What ECG stands for and is used for?

A
  • Electro cardio graphy

- To record electrical potential differences generated by the heart and conducted to the body surface.

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15
Q

What does the ECQ result tell us?

A
  • The hearts position
  • Heart rate
  • Pacemaker rhytm and its origin.
  • Propagation of depolarization/repolarization.
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16
Q

P wave

A
  • Positive wave
  • Atrial depolarization
  • Can’t be seen on the ECG trace because it coincides with the QRS complex.
17
Q

Q wave

A
  • Associated with ventricular electrical actions.

- Indicates the transmission of excitation from the His bundle to the ventricular muscle.

18
Q

R wave

A
  • Indicates DEPOLARIZATION of the major mass of the ventricles.
  • The CARDIAC AXIS can be determined by the AMPLITUDE of the R wave.
19
Q

S wave

A
  • Negative wave ( occurs after the R wave )
20
Q

QRS complex

A

A result of the ventricular depolarization of the ECG (a special pattern)

21
Q

T wave

A
  • Ventricular repolarization
  • Varies between the species
  • In human and carnivores an upward deflection (like the P wave the indicates depolarization)
22
Q

What’s vectorcardiogram?

A

The total sum of the vector loops

23
Q

What does the cardiac axis in practice refers to?

A

Size of the heart

24
Q

What is cardiac axis deviation mainly cause by?

A

A change in the spreading of the DEPOLARIZATION

25
Q

What play a definite role in the formation and the volume of the Interstitial fluid (ISF)?

A

Filtration and resorption

26
Q

What’s systolic pressure?

A

Maximal pressure during a cardiac cycle

27
Q

What’s diastolic pressure?

A

Minimum pressure measured at the end of the distole

28
Q

What’s Mean arterial pressure?

A

Average blood pressure over a period of time

29
Q

What’s pulse pressure?

A

Difference of systolic and diastolic pressures

30
Q

What does Indirect blood pressure measuring mean?

A

An artery (a. brachialis) compressed and the released slowly.

31
Q

How do we determine the Blood pressure values?

A

Based on different sounds that originates from the blood flow and clapping of the artery wall.

32
Q

The sounds that’s measured in the blood pressure to determine the value, where do they occur?

A

Between the systolic and diastolic blood pressure values

Physiology 1. (9 decks)

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