Muscle Tissue

Question 1

Muscle Tissue

Answer 1

Characteristics -cellularity (more cells than matrix) -cells contain myosin and actin -high vascularity (carries 02, C6H12O6, H2O, and removes waste) -tremendous relationship with nervous system

Question 2

Are muscle cells lifelong?

Answer 2

Yes, except smooth muscle of the uterus during pregnacy

Question 3

What is muscle tissue replaced with when it dies?

Answer 3

Dense CT (scar tissue) which is strong but not contractile

Question 4

Skeletal Muscle

Answer 4

Characteristics -striated -can only contract and get shorter -pull as a team -voluntary -long, lots of nuclei, lots of mitochondria -increase in size with use

Question 5

Cardiac Muscle

Answer 5

Characteristics -striated -only one nuclei -cells are short and branched -self-contracting -use free fatty acids (FFA) as fuel

Question 6

Smooth Muscle

Answer 6

Characteristics -not striated -tapered at ends -involuntary (sensitive to nerve stimulation and hormones) -very strong and can hold a contraction longer than skeletal muscle -can come out of Go in special circumstances Location -walls of hollow organs -medium and larger blood vessels -bronchiole tubes

Question 7

Myosin

Answer 7

one type of contractile protein

Question 8

Actin

Answer 8

one type of contractile protein

Question 9

Grip Junction

Answer 9

-form intercalcated discs -contract as unit -found in cardiac muscle

Question 10

A Bands

Answer 10

the darker lines in muscle tissue

Question 11

I Bands

Answer 11

the lighter lines in between A bands in muscle tissue