Para and sympathetic divisions

Question 1

Which stimulation hyperpolarizes the membrane potential of the autorhythmic cell and slows depolarization, slowing down the heart rate

Answer 1

parasympathetic division

Question 2

These two things depolarize the autorhtymic cell and speed up the pacemaker potential, increasing the heart rate

Answer 2

sympathetic stimulation and epinephrine

Question 3

Which body systems control contractility?

Answer 3

Nervous and endocrine systems

Question 4

Any chemical that affects contractility is called an_____and it exerts what affect?

Answer 4

inotropic agent
inotropic effect

Question 5

Positive inotropes function

Answer 5

increase contractility

Question 6

What are some examples of inotropes?

Answer 6

Epinephrine, norepinephrine, and digitalis

Catecholamines increase Ca2+ storage with phospholamban

Question 7

What do catecholamines increse?

Answer 7

Catecholamines increase Ca2+ storage with phospholamban

Question 8

Negative inotropes function

Answer 8

decrease contractility

Question 9

Catechomalines such as epinephrine or norepinephrine are important in

Answer 9

increasing cardiac contraction