WEEK 3

Question 1

4 primary muscles of mastication

Answer 1

1. Masseter
2. Temporalis
3. Medial pterygoid
4. Lateral pterygoid

Question 2

Masseter

• origin
• insertion
• position
• orientation
• innervation

Answer 2

origin - zygomatic arch
insertion - angle of mandible
position - anterior to TMJ
orientation - elevation + protrusion of mandible
innervation - mandibular division of trigeminal nerve

Question 3

What is the tissue type of the epidermis?

Answer 3

Stratified squamous keratinized epithelium

Question 4

What is the tisssue type of the dermis?

Answer 4

Dense regular connective tissue

Question 5

What is the tisssue type of the dermis?

Answer 5

Dense regular connective tissue

Question 6

What is the tissue type of the hypodermis?

Answer 6

Adipose tissue

Question 7

3 specialised cell types

Answer 7

1. Melanocytes
2. Langerhans cells
3. Merkel cells

Question 8

Function + location of melanocytes

Answer 8

Produce melanin
Seen in stratum basale

Question 9

Function + location of langerhans cells

Answer 9

Act as macrophages
Seen in stratum spinosum

Question 10

Function + location of Merkel cells

Answer 10

Act as receptor cells
Seen in stratum basale

Question 11

5 layers of epidermis (deep —> superficial)

Answer 11

1. Stratum basale
2. Stratum spinosum
3. Stratum granulosum
4. Stratum lucidum
5. Stratum corneum

Question 12

2 layers of the dermis

Answer 12

1. Papillary layer
2. Reticular layer

Question 13

Sebaceous glands

Answer 13

• secrete sebum
• holocrine gland (entire cell destroyed to release secretion)
• usually open to hair follicle
• contraction of arrest or pilli muscles releases secretions

Question 14

Arrest or pilli muscles

Answer 14

• Sundale of smooth muscle
• contraction pulls hair follicle upright
• under sympathetic control

Question 15

3 layers of blood vessels

Answer 15

1. Tunica intima
2. Tunica media
3. Tunica adventitia

Question 16

Tunica intima

Answer 16

• inner layer endothelium = simple squamous epithelium
• subendothelial connective tissue = loose areolar connective tissue

Question 17

Tunica media

Answer 17

• smooth muscle and elastic fibres

Question 18

Tunica adventitia

Answer 18

• loose areolar connective tissue
• contain vasa vasorum

Question 19

Vasa vasorum

Answer 19

Blood vessels supplying blood vessels

Question 20

Internal elastic lamina

Answer 20

Seen between the sub endothelial layer and tunica media

Question 21

External elastic lamina

Answer 21

Seen between tunica media and tunica adventitia

Question 22

What tisssue type is the lymph node made up of?

Answer 22

Dense connective tissue

Question 23

Paracortex contains ___ cells

Answer 23

T cells

Question 24

Lymphoid follicles are made up of ___ cells

Answer 24

B cells

Question 25

Medulla contains

Answer 25

Medullary cords
Medullary sinuses

Question 26

Medullary cords contain

Answer 26

B cells
Plasma cells

Question 27

Function of medullary sinuses

Answer 27

Carry lymph through the lymph node as it is being filtered after being in contact with lymphocytes

Question 28

Characteristics of elastic artery

Answer 28

• lots of elastic tissue
• not wavy on epithelium
• eg. Aorta

Question 29

Characteristics of muscular/ medium sized artery

Answer 29

• wavy tunica intima