Histology Lab Midterm

Lab

a dense collagenous tissue surrounding each fascicle

perimysium

a dense collagenous sheath that binds the fascicles into a single nucleus

epimysium

Occupying the spaces between individual muscle fibres (barely visible)

endomysium

Where can you find Type I collagen fibers

bones

What are type I collagen fibers made up of

bundles of fibers that roughly run parallel to each other and have transverse bands

Where can you find type II collagen fibers

cartilage

What are Type II collagen fibers made up of

fibers that are organized in random directions

What forms the basal lamina

Type IV collagen fibers

Name layers of epidermis from deep to superficial

1. Stratum Basale

2. Stratum Spinosum

3. Stratum Granulosum

4. Stratum Lucidum

5. Statum Corneum

Which layer is found in thick skin

stratum lucidum

What cells are found in stratum basal

basal keratinocytes, cuboidal stem cells and precursors

What cells are found in spinosum, granulosum, lucidum

keratinocytes, stratified squamous epithelial cells

what cells produce pigment

melanocytes

why is the stratum spinosum “spiky”

from desmosomes that hold cells tight

Single row of cells attached to the dermis

stratum basal

which layer receives adequate nourishment, but as cells are pushed higher, away from source of nutrition, they gradually die. Layer is Spike

statum spinosum

which layer has abundant granules in cells

stratum granulosum

Very thin translucent band of flattened dead keratinocytes. Found in thick skin

stratum lucidum

What is the outermost layer. These are dead cells. Constantly rubbing off and being replaced by deeper cells

Stratum Corneum

What does adipose tissue look like under a microscope

Matrix is sparse, but resembles areolar matrix. Closely packed adipocytes

utermost layer of the skin

• composed primarily of stratified squamous epithelial cells called keratinocytes

Epidermis

composed of mostly dense connective tissue

• Fibers: collagenic and elastic fibers

• Cells: fibroblasts, adipocytes; various phagocytes

Dermis

deepest layer of the skin, located beneath the epidermis and the dermis

hypodermis

What section is this

oblique

what section is this

Cross

What Section is this

longitudinal

What tissue is this

simple cuboidal

What tissue is this

Simple squamous

What tissue is this

Simple columnar

What tissue is this

stratified squamous

What tissue is this

stratified cuboidal

what tissue is this

stratified columnar

What tissue is this

reticular

What tissue is this

dense regular

what tissue is this

dense irregular

What tissue is this

elastic

What type of bone is this

spongy bone

What type of bone is this

compact bone

What does spongy bone contain

trabeculae and bone marrow

Where is spongy bone found

epiphysis

What does compact bone contain

osteons, ECM, blood vessels, and nerves

Where is compact bone found

diaphysis

What kind of cartilage is this

elastic

What kind of cartilage is this

fibrocartilage

What kind of cartilage is this

hyaline

What is a mature cartilage cell

chondrocytes

Where are chondrocytes found

in lacunae

What tissue is this

Adipose

What is the arrow pointing to on the myofibril

M Line

What is the arrow pointing to on the myofibril

I Band

What is the arrow pointing to on the myofibril

Thick Filaments (myosin)

What is the arrow pointing to on the myofibril

Thin Filaments (actin)

What is the arrow pointing to on the myofibril

A Band

What is the arrow pointing to on the myofibril

Z Disc/Z Line

What is the arrow pointing to on the myofibril

H Band

What is outlined on the bone

Lamella/Concentric Circles

What is the arrow pointing to on the bone

Central Canal/Haversian Canal

What is the outlined on the bone

Lacuna

What is the arrow pointing to on the bone (small lines)

Canaliculi

What is the arrow pointing to on the bone

Osteon

What is the arrow pointing to on the bone

Periosteum

Where can you find an osteocyte in bone tissue

Within the lacuna

What is #1 pointing to on the bone

endosteum

What is #9 pointing to on the myofibril

sarcomere

What is #2 pointing to on the muscle

epimysium

What is #3 pointing to muscle

perimysium

What is #4 pointing to on the muscle

endomysium

What is #5 pointing to on the muscle

Myofibril

What is the small blue sheath around on the muscle

fascicle

specialized intercellular connection that directly links the cytoplasm of adjacent cells

Gap Junction

What is #1 pointing to on the synapse

postsynaptic membrane

What is #2 pointing to on the synapse

synaptic cleft

What is #3 pointing to on the synapse

neurotransmitter

What is #4 pointing to on the synapse

synaptic vesicle

What is #5 pointing to on the synapse

presynaptic neuron

What is the green arrow pointing to cardiac muscle

Gap Junction

What are the black arrows pointing to on the cardiac muscle

intercalated disc

essential chemical messenger (neurotransmitter) that transmits signals across the gap between a nerve cell and another cell

ACH (acetylcholine)

What tissue is this

pseudostratified columnar