Integument II

Question 1

Sebaceous Glands

Answer 1

Holocrine glands - branched acinar w/ short ducts. Found everywhere except palms and soles. Growth stimulated at puberty by sex hormones.

Question 2

What do sebaceous glands produce?

Answer 2

sebum - released into hair follicle.

Question 3

Sudoriferous Glands

Answer 3

sweat glands - both merocrine and apocrine

Question 4

Merocrine Sudoriferous Glands

Answer 4

Coiled, simple tubular secretory portions: lines w/ simple epi. Apical dark secretory cells secrete glycoproteins and basal clear cells secrete water and electrolytes. Duct system - stratified cuboidal epi. Cholinergic endings.

Question 5

Apocrine Sudoriferous Glands

Answer 5

Found in labia majora, areola, axillary and anal regions. Secretions are thicker and more viscous. Excretory duct opens into hair follice (no hair in it). Adrenergic innervation. Inactive until puberty.

Question 6

Special types of apocrine sudoriferous glands

Answer 6

ceruminous glands (ear wax) and glands of moll (eyelids)

Question 7

3 components of Hair follicle

Answer 7

Hair follicle, root, and free shaft.

Question 8

What is the hair follicle developed from?

Answer 8

Epidermis as an elastic, keratinized thread

Question 9

What types of glands are associated w/ hair follicles?

Answer 9

sebaceous glands and also arrector pili muscles

Question 10

Hair bulb

Answer 10

Expanded lower part of hair follicle
Matrix
Vascularized dermal papilla

Question 11

External root sheath

Answer 11

down growth of epidermis

Question 12

Internal root sheath

Answer 12

Generated by bulb matrix - Layers include Henle’s Huxley’s and the cuticle which interlocks w/ cuticle of hair shaft.

Question 13

3 layers of the hair shaft

Answer 13

Medulla (innermost), cortex, and cuticle