lab 2 muscle

Question 1

Three types of muscle

Answer 1

skeletal, cardiac, smooth

Question 2

The skeletal and cardiac muscle have been stained with ____ in order to emphasize the ____

Answer 2

phosphotungstic acid
banding pattern

Question 3

Skeletal muscle cells are ____
Where are the nuclei located within the cell?

Answer 3

multinucleate
outside of cell

Question 4

Compare the striations with those of skeletal muscle. Are they the same?

Answer 4

not really

both striated but cardiac muscles can be branched forming angles, intercalated discs transfer electrical impulses

Question 5

cardiac muscle cells are ____and have a ___ nucleus.

Answer 5

branched

single, centrally located

Question 6

What is the name of the things in between cardiac cells

Answer 6

intercalated discs

Question 7

Smooth Muscle is____shaped and contains ____ nucleus.

Answer 7

spindled
one centrally located

Question 8

Smooth muscle tissue is often bordered by ___ which is rich in ___

Answer 8

connective tissue
collagen

Question 9

Difference between smooth muscle and connective tissue

Answer 9

Collagen is markedly eosinophilic (pink because it stains with eosin) and has a refractile/shiny quality.

Smooth muscle appears dull in comparison and its eosinophilia is tarnished by a slight purplish haze.

Question 10

cardiac muscle

Answer 10

Question 11

cardiac muscle

Answer 11

Question 12

Answer 12

Skeletal Muscle Tongue

1. Skeletal muscle in cross-section
2. Skeletal muscle in longitudinal section
   *Note cross-striations
3. Skeletal muscle nuclei
   *Note nuclei at periphery of cell
4. Capillary
   *Note nuclei at periphery of blood vessel

Question 13

Answer 13

Skeletal Muscle Tongue

1. Skeletal muscle in longitudinal section
   *Note cross-striations
2. Skeletal muscle in cross-section
3. Skeletal muscle nuclei
   *Note nuclei at periphery of cell

Question 14

Answer 14

1. Cardiac cell nuclei
   *Note nuclei in center of cell

Question 15

Answer 15

Cardiac Muscle

1. Cardiac cell nuclei
   *Note nuclei in center of cell
2. Intercalated discs
3. Cross-striations

Question 16

Answer 16

Smooth Muscle

1. Intestinal lumen
2. Mucosa
3. Submucosa
4. Muscularis externa (smooth muscle)

Question 17

Intestine

Answer 17

1. Muscularis externa in longitudinal section
2. Muscularis externa in cross-section
3. Smooth muscle cell nuclei

Question 18

Answer 18

Stomach

1. Muscularis mucosae (smooth muscle)
2. Muscularis externa (smooth muscle)

Question 19

Answer 19

Stomach

1. Muscularis externa (smooth muscle)
   1a. Inner circular layer in longitudinal section
   1b. Outer longitudinal layer in cross-section
2. Smooth muscle cell nuclei
3. Space artifact

Question 20

Answer 20

Smooth Muscle Jejunum

1. Mucosa
2. Submucosa
3. Muscularis externa
   3a. Inner circular layer in longitudinal section

3b. Outer longitudinal layer in cross-section

Question 21

Answer 21

Smooth Muscle, jejunum

1. Muscularis externa, inner circular layer in longitudinal section
2. Muscularis externa, outer longitudinal layer in cross-section
3. Smooth muscle cell nuclei

Question 22

what kind of muscle

Answer 22

Cardiac

skeletal

Smooth

Question 23

what kind of muscle

Answer 23

skeletal

Question 24

what kind of muscle?

Answer 24

smooth

spindle shape

central nucleus

no stiations

Question 25

Answer 25

tongue **Skeletal Muscle** cross section longitudinal view nucleus at edge of cell striated multinucleated

Question 26

what kind of muscle?

Answer 26

**skeletal** striated multinucleated nucleus at edge of cell tounge with vallate papilla

Question 27

what is circled

Answer 27

intercalated disc of cardiac muscle striated one nucleus branched

Question 28

name the areas from left to right

Answer 28

Question 29

what kind of muscle

Answer 29

**cardiac** striated intercalated discs one central nucleus branched

Question 30

make up of cardiac muscle

Answer 30

Question 31

make up of skeletal muscle

Answer 31