Blood Vessels And Nerves

Question 1

What is the general structure of an artery

Answer 1

Endothelium
Intima
Media
Adventitia
External elastic lamina
Basement membrane
Internal elastic lamina

Question 2

Where can elastic arteries be found

Answer 2

Arteries near the heart
Eg- aorta and pulmonary arteries

Question 3

What type of artery are most arteries

Answer 3

Muscular arteries

Question 4

Examples of muscular arteries

Answer 4

Radial artery
Splenic artery

Question 5

In a muscular artery what does the media comprise of

Answer 5

Smooth muscle

Question 6

What are arterioles

Answer 6

Resistance vessels

Question 7

What is defined as an arteriole

Answer 7

Having 3 or less muscle layers in their media

Question 8

What is the general structure of capillaries

Answer 8

Endothelium
Intima
Media
External elastic lamina
Basement membrane
Interal elastic lamina
Maybe have a pericyte attached to them
May have a fenestrated basement membrane

Question 9

What are capillaries composed of

Answer 9

Thin walled endothelial cells with no surrounding muscle or connective tissue

Question 10

Where can fenestrated capillaries be found

Answer 10

Kidney and liver

Question 11

What is the general structure of veins

Answer 11

Endothelium
Intima
Media
Adventitia
Basement membrane
Internal elastic lamina

Question 12

What are venules associated with

Answer 12

Arterioles

Question 13

Characteristics of venules

Answer 13

Thin walled

Question 14

As a venule increases in size what happens to it

Answer 14

A contractile pericyte wraps round the outside of the endothelial cells to form a complete layer

Question 15

Characteristics of veins

Answer 15

Thick walled compared to venules
Thin walled compared to arteries

Question 16

What are characteristics of lymphatics

Answer 16

Thin walled
Have valves
Do not contain blood
Contains lymph

Question 17

What are peripheral nerves made up of

Answer 17

Axons

Question 18

What are peripheral nerves supported by

Answer 18

Schwann cells

Question 19

Where is myelin produced

Answer 19

Schwann cells

Question 20

What is present in a myelinated peripheral nerve

Answer 20

Endoneurium
Perineurium
Epineurium

Question 21

Where can endoneurium be found

Answer 21

Present between individual axons

Question 22

Where can perineurium be found

Answer 22

Surrounds the groups of axons to form fascicles

Question 23

Where can epineurium be found

Answer 23

Binds fascicles together to form nerve fibres

Question 24

What makes up a small peripheral nerve fibre

Answer 24

Bundle of axons inter spread with endoneuruim surrounded by perineurium and epineurium

Question 25

What is the function of myelin

Answer 25

Insulates axons

Question 26

What are the gaps between the Schwann cells

Answer 26

Nodes of ranvier

Question 27

What is the differences between a myelinated and unmyelinated axon

Answer 27

Myelinated axons are larger and transmit an impulse faster than unmyelinated ones

Question 28

What are the different types of peripheral nerves

Answer 28

Motor neurons Sensory neurons Sympathetic neurons Parasympathetic neurons

Question 29

Where are motor neuron cell bodies found

Answer 29

In the grey matter of the spinal cord

Question 30

Where are sensory neuron cell bodies found

Answer 30

They are found in the dorsal root ganglion

Question 31

Where are sympathetic neuron cell bodies found

Answer 31

They are found in they grey matter of the spinal cord and in adjacent sympathetic ganglia

Question 32

Where are parasympathetic neuron cell bodies found

Answer 32

Cell bodies are in the brain and local ganglia

Question 33

How is myelin formed

Answer 33

Formed by Schwann cells wrapping around the axon

Question 34

What is this showing

Answer 34

Elastic artery

Question 35

What is this showing

Answer 35

Muscular artery

Question 36

What is this showing

Answer 36

Capillaries

Question 37

What is this showing

Answer 37

Venules

Question 38

What is this showing

Answer 38

Veins

Question 39

What is this showing

Answer 39

Lymphatics

Question 40

What are the arrows pointed to

Answer 40

The 3 arrows are pointing to unmyelinated axons The second arrow is pointing to a Schwann cell The third arrow is pointing to a myelinated axon

Question 41

What stain is been used here

Answer 41

Silver stain

Question 42

What stain is been used here

Answer 42

H&E stain