Integumentary System

Question 1

Effects of sex pheromones is produced by

Answer 1

Apocrine sex glands

Question 2

Relative thickness of thick and thin skin

Answer 2

400 to 600 micrometer

75 to 150 micrometer

Question 3

Other cells found in the epidrmis

Answer 3

Langerhans cells
Merkel cells.
Melanocytes

Question 4

Layers of epidermis

Answer 4

Stratum basale 
Spinosum
Granulosum
Lucidum
Corneum

Question 5

Cells in stratum basale are

Answer 5

Basophilic cuboidal or columnar cells

Question 6

Stratum spinosum cells are… shaped

Answer 6

Polyhedral

Question 7

Basale and spinosum collectively known as

Answer 7

Malpighian layer

Question 8

Cells in stratum lucidum are…

Answer 8

Eosinophilic

Question 9

Abnormalities of the dermal-epidermal junction can lead to

Answer 9

Blistering disorder(bulbous pemphigoid)

Pemphigus is caused by autoimmune damage to intercellular junctional between keratinocytes

Question 10

Langerhans cells function and found in which layer?

Answer 10

Antigen presenting cells and found in stratum spinosum

Question 11

Melanocytes

Answer 11

Found in base. In top of stratum basale, base of stratum spinosum. Choose basale if asked
Produce pigments

Question 12

Merkel’s cells

Answer 12

Sensory cells. Found in stratum basale

Question 13

Melanin synthesis

Answer 13

By tyrosinase. Activated by uv light. Produced in rer. Packaged by golgi apparatus into oval granules (melanosomes). Tyrosine transported into melanosome. Tyrosine oxidized into 3,4 dihydroxyphenylalanine(dopa) then to dopaquinine. Converted to melanin after several processes

Question 14

Which cells of the hair contain melanin responsible for skin colour

Answer 14

Medulla

Question 15

Krause corpuscles responsible for detecting?

Answer 15

Cold stimuli

Question 16

Layers of the hair

Answer 16

Cuticle
Cortex
Medulla

Question 17

Note that there is no medulla in thin hair

Answer 17

…

Question 18

Hair follicle divided into 3 segments

Answer 18

Infundibulum
Isthmus
Inferior segment

Question 19

Main layers of hair follice

Answer 19

Internal root sheath and external root sheath

Question 20

Layers of the internal root sheath

Answer 20

Cuticle:flattened cornified cells
Huxley’s layer: flattened nucleated cells
Henle’s layer : cubical cells with flattened nuclei

Question 21

Two types of swear glands

Answer 21

Merocrine/Errcrine sweat glands

Apocrine sweat glands

Question 22

Apocrine sweat glands found in which regions of the body?

Answer 22

Axillary, areolar and anal regions