Lecture 2

Question 1

Major difference between cardiomyocytes & skeletal muscle cells.

Answer 1

Presence of intercalated discs

Question 2

The are found in areas where adjacent membranes come close together.

Answer 2

Intercalated Discs

Question 3

The fascia adherens of Intercalated Discs has what function?

Answer 3

Transmits force between coupled cells & provides anchor for myofibrils to link to membrane

Question 4

The function of the transitional junction in Intercalated Discs is?

Answer 4

Works with fascia adherens to anchor actin

Question 5

The gap junction of Intercalated Discs has what function?

Answer 5

Allows action potential to propagate between cells

Question 6

The functional unit of the myofibril is the…

Answer 6

Sarcomere

Question 7

Myosin II has these types of chains

Answer 7

2 heavy chains & 4 light chains bound at heavy chain neck region

Question 8

The volume of blood output per unit time

Answer 8

Cardiac Output

Question 9

The volume of blood ejected in each ventricular systole

Answer 9

Stroke Volume

Question 10

Chronotropic action has what effect on C.O.?

Answer 10

Increases heart rate

Question 11

Inotropic action has what effect on C.O.?

Answer 11

Increases stroke volume