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Pnb 2275 Lab 3 Exam Actual Questions And Correct Answers

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PNB 2275 Lab 3 Exam ACTUAL QUESTIONS AND CORRECT ANSWERS Frog heart - CORRECT ANSWER SV nodes Trabeculae help keep blood separated 3 chambers, 1 ventricle Increase temperature - CORRECT ANSWER Proteins and enzymes work more efficiently G10 - CORRECT ANSWER increase heart rate measures how much the rate of a process increases with temp in 10 degree intervals Decrease temperatire - CORRECT ANSWER Proteins and enzymes don't work as efficiently Increase Ca - CORRECT ANSWER decreases heart rate and increases force obvious increase in force with little to no increase in heart rate Increases contractility because this ion is important in muscle contraction, facilitates cross bridge formation Enters cytosol through L-type receptors and binds to ryr Increase K - CORRECT ANSWER No force change increase heart rate then decrease heart rate Depolarizes membrane potential of pacemaker cells and decreases threshold Extremely high dose can flip concentrations, making it unable to contract Ach - CORRECT ANSWER Parasympathetic decrease heart rate and contractile force Activates muscarinic receptors, Gi, decrease AC, decrease camp Decrease HCN activity (HR)

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PNB 2275 Lab 3 Exam ACTUAL
QUESTIONS AND CORRECT ANSWERS
Frog heart - CORRECT ANSWER 3 chambers, 1 ventricle

SV nodes

Trabeculae help keep blood separated



Increase temperature - CORRECT ANSWER increase heart rate

Proteins and enzymes work more efficiently



G10 - CORRECT ANSWER measures how much the rate of a process increases with temp in
10 degree intervals



Decrease temperatire - CORRECT ANSWER decreases heart rate and increases force

Proteins and enzymes don't work as efficiently



Increase Ca - CORRECT ANSWER obvious increase in force with little to no increase in heart
rate

Increases contractility because this ion is important in muscle contraction, facilitates cross bridge
formation

Enters cytosol through L-type receptors and binds to ryr



Increase K - CORRECT ANSWER increase heart rate then decrease heart rate

No force change

Depolarizes membrane potential of pacemaker cells and decreases threshold

Extremely high dose can flip concentrations, making it unable to contract



Ach - CORRECT ANSWER decrease heart rate and contractile force

Parasympathetic

Activates muscarinic receptors, Gi, decrease AC, decrease camp

Decrease HCN activity (HR)

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