Muscular Tissue

Question 1

What happens when muscle tissue permit excitability:

Answer 1

Excitability as their plasma membranes can change their electrical states (from polarized to depolarized)

Question 2

What are the 3 types of muscle tissue:

Answer 2

Skeletal muscle (Striated)
Cardiac muscle (stritaed)
Smooth muscle (Non- striated)

Question 3

What are the difference among the 3 muscle types:

Answer 3

Organization of their contractile proteins—actin and myosin

Question 4

What creates the stripes(Striations) on muscle tissue:

Answer 4

The actin and myosin proteins are arranged very regularly in the cytoplasm of individual muscle cells (fibers) in both skeletal muscle and cardiac muscle, which creates striations.

Question 5

Skeletal muscle fibers are multinucleated structures that compose the skeletal muscle.

Question 6

Cardiac muscle fibers each have one to two nuclei and are physically and electrically connected to each other so that the entire heart contracts as one unit (called a syncytium)

Question 7

What creates the Non-Striated muscle tissue:

Answer 7

Actin and myosin are not arranged in such regular fashion in smooth muscle, the cytoplasm of a smooth muscle fiber has a uniform, nonstriated appearance.

Question 8

Skeletal muscle Microscopic Features:

Answer 8

Skeletal muscle fibers are multinucleated structures that compose the skeletal muscle.

Question 9

Cardiac muscle Microscopic Features:

Answer 9

Fibers each have one to two nuclei and are physically and electrically connected to each other so that the entire heart contracts as one unit (called a syncytium)

Question 10

Smooth muscle Microscopic Features:

Answer 10

Walls of arteries is a critical component that regulates blood pressure necessary to push blood through the circulatory system; and smooth muscle in the skin, visceral organs, and internal passageways is essential for moving all materials through the body

Question 11

Skeletal Muscle Function and location:

Question 12

Cardiac Muscle Function and location:

Answer 12

Function:

Location:
only found in the heart

Question 13

Smooth Muscle Function and location:

Answer 13

Function:
contract and cause movement
produce movement but also to stop movement

Location:
Openings of internal tracts to control the movement of various substances

Question 14

What are intercalated disc:

Answer 14

• Allows the cardiac muscle cells to contract in a wave-like pattern so that the heart can work as a pump
• Part of the sarcolemma and contain two structures important in cardiac muscle contraction: gap junctions and desmosomes

Question 15

What is a gap junction:

Answer 15

A gap junction forms channels between adjacent cardiac muscle fibers that allow the depolarizing current produced by cations to flow from one cardiac muscle cell to the next