Muscle Tissue And Organization Of Skeletal Muscle

Question 1

Skeletal Muscle Tissue

Answer 1

Cells are long, cylindrical, striated and multnucleate

Question 2

Locations of Skeletal Muscle Tissue

Answer 2

Combined with connective tissues and neural tissue in skeletal muscles

Question 3

Functions of Skeletal Muscle Tissue

Answer 3

Moves or stabilizes the position of the skeleton; guards entrances and exits to the digestive, respiratory, and urinary tracts; generates heat; protects internal organs

Question 4

Cardiac Muscle Tissue

Answer 4

Cells are short, branched, and striated, usually with a single nucleus; cells are interconnected by intercalated discs

Question 5

Location of Cardiac Muscle Tissue

Answer 5

The heart

Question 6

Functions of Cardiac Muscle Tissue

Answer 6

Circulates blood; maintains blood pressure

Question 7

Smooth Muscle Tissue

Answer 7

Cells are short, spindle shaped, and non striated, with a single, central nucleus

Question 8

Locations of Smooth Muscle Tissue

Answer 8

Found in the walls of blood vessels and in digestive, respiratory, urinary, and reproductive organs

Question 9

Functions of Smooth Muscle Tissue

Answer 9

Moves food, urine, and reproductive tract secretions; controls diameter of respiratory passageways; regulates diameter of blood vessels

Question 10

Myofibrils

Answer 10

Rods that extend the length of the fiber (consists of thin and thick filaments)

Thin: Actin
Thick: Myosin

Question 11

Sarcoplasmic reticulum

Answer 11

Modified

Question 12

Endoplasmic reticulum

Answer 12

Where calcium ions are stored

Question 13

G-Actin

Answer 13

Individual spherical molecules twisted together into an F-actin strand

Question 14

Active site

Answer 14

Where myosin molecules in thick filaments bind during contraction

Question 15

Tropomyosin

Answer 15

Block active sites to regulate muscle contraction

Question 16

Troponin

Answer 16

Holds tropomyosin in position and has binding sites for calcium