Week 4 retrieval

Which best describes the systole phase of the cardiac cycle?

• The ventricles relax, which allows them to fill with blood.

• The volume of blood ejected from the heart per beat

• The ventricles will contract, forcing blood out of the heart, into the aorta or pulmonary arterty.

• The pH in the ventricles increase, allowing the expansion of the atria, to force blood out of the heart.

What is the enzyme called that breaks down phosphocreatine?

How long does the ATP-PC system last before phosphocreatine stores start to deplete?

• 0-10 seconds

• 10-60 seconds

• 60-120 seconds

• 60 seconds- 30 minutes

What is Starling's Law?

• The volume of blood ejected from the left ventricle per minute.

• An increase in venous return, will increase the pressure and force of contraction of the ventricles, thus increasing stroke volume.

• Blood is redistributed to the working muscles through vasodilation and vasoconstriction.

• There is a difference in V02 in the arteries and veins, that indicates a better extraction of oxygen by the muscles.

What is the role of the muscle spindles?

• They detect a change in muscle tension, thus allows the CNS to relax the muscle. This reduces the chance of injury.

• They detect a change in pH, blood oxygen, and blood carbon dioxide. This information is sent to the medulla oblangata.

• They detect a change in length of the muscle. This information is sent to the CNS, to recruit more more motor units for greater contraction. Reducing the chance of injury.

What is the neurotransmitter called that travels across the synaptic cleft?

• Acetylcholine

• Acetylcoenzyme A

• Phosphofructokinase

• Vasodilation.

How would you structure an analyse question?

• Consider all the factors.

  Apply to a specific situation.

  Identify those which are the most important or relevant.

• Identify the facts.

  Link them together.

  Explain the importance in relation to another.

• Provide a justification to your point using evidence or an example.

How would you structure your assess questions?

• Consider all the factors.

  Apply to a specific situation.

  Identify those which are the most important.

• Identify the facts.

  Link them together (in relation to question(

  Explain their importance in relation to another.

• Justify your point using evidence or an example.

What is the calculation for minute ventilation?

• Minute ventilation =breathing rate x tidal volume

• Minute ventilation= pulmonary rate x tidal volume.

• Minute ventilation= Heart rate x stroke volume.