Histology

Question 1

A muscle is made of ______

Answer 1

fascicles

Question 2

A fascicle is made of

Answer 2

Muscle fibers

Question 3

Myofibrils are composed of

Answer 3

a linear array of sarcomeres

Question 4

A sarcomere is the _________

Answer 4

basic contractile unite of muscle fiber

Question 5

Muscle fibers can increase in ______ but not in _____

Answer 5

Can increase in size but not in number

Question 6

Skeletal muscle is striated/not striated

Answer 6

striated

Question 7

Skeletal muscle is multinucleated or uninucleated (where is it located?)

Answer 7

multinucleated and located on the periphery

Question 8

What type of muscle fiber has the most mitochondria

Answer 8

type I

Question 9

is this slow twitch or fast twitch?

Answer 9

slow (more red)

Question 10

More red fiber in muscle means what

Answer 10

more mitochondria

Question 11

In muscle fibers, does glycogen show more in red or white fibers?

Answer 11

White fibers show More glycogen
Red fibers show less glycogen

Question 12

which has more blood capillaries? red or white fiber?

Answer 12

Red fiber

Question 13

List the five features of red muscle fibers

Answer 13

1. half the diameter of white muscle fibers
2. Dark red in color due to a large quantity of myoglobin
3. Surrounded by many capllaries
4. Have many mitochondria
5. Have a low glycogen content

Question 14

Define endomysium

Answer 14

covers muscle fibers

Question 15

define perimysium

Answer 15

covers fasicles

Question 16

define epimysium

Answer 16

covers whole muscle (thick dense and irregular)

Question 17

Memorize this

Answer 17

Question 18

What are golgi tendon organs? What do they do

Answer 18

Sensory structures located within tendons
Prevent over extension by triggering contraction

Question 19

Is cardiac muscle striated? Is it multinucleated?

Answer 19

Striated and mononucleated

Question 20

Look at intercalated discs in cardiac muscle

Answer 20

Question 21

what connects the muscle fiber region?

Answer 21

zonula adherens

Question 22

What connects the mitochondria region?

Answer 22

desmosomes

Question 23

what connects cell membranes on the side?

Answer 23

gap junctions

Question 24

Motor nerves act as ______ nerves

Answer 24

Efferent: carries information out from the CNS to muscle fibers to facilitate muscle contraction

Question 25

Sensory nerves act as ________ nerves

Answer 25

Afferent. Sensory nerves act as afferent nerves and send signals to CNS

Question 26

Look at this image

Answer 26

Question 27

What is banding pattern?

Answer 27

Alignment of myofilaments that give a banding pattern under a light microscope.

Question 28

Identify what is the I band, A band, and Z line

Answer 28

Question 29

During muscle contraction, explain what Z discs, I bands, and A bands do

Answer 29

Z discs draw closer
I bands diminish in width
A band remain the same

Question 30

Memorize this

Answer 30

Question 31

Where do you find smooth muscle?

Answer 31

hollow organs, vessels, and ducts

Question 32

This is an image of what smooth muscle

Answer 32

gut smooth muscle

Question 33

Memorize this

Answer 33

Question 34

What is the only muscle type that has tendon

Answer 34

only skeletal muscle

Question 35

What are the 6 cells of connective tissue?

Answer 35

1. Fibroblasts
2. adipocytes
3. macrophages
4. plasma cells
5. leukocytes
   6 mast cells (inflammatory response, innate immunity, tissue repair)

Question 36

Memorize this

Answer 36

Question 37

What is the most abundant protein in the body and what is secreted by?

Answer 37

Collagen. Secreted mostly by fibroblasts

Question 38

What is this

Answer 38

Collagen cell

Question 39

What type of fibers are formed by collagen type III

Answer 39

Reticular fibers