Fscj Bsc2085 Lab 5 Answers

Topics: Skin, Epidermis, Skin anatomy Pages: 6 (1038 words) Published: October 26, 2011
Lab 5: The Integumentary SystemName

Using the key choices below, identify the indicated structures.

A. adipose tissue
B. venule
C. motor nerve
D. dermis
E. arrector pili muscle
F. hair bulb
G. merocrine sweat gland
H. hypodermis
I. apocrine sweat gland
J. sebaceous gland

1. D
2. H

Using the key choices below, choose ALL responses that apply to the following descriptions.

A. stratum corneum
B. stratum basale
C. stratum granulosum
D. stratum lucidum
E. papillary layer
F. reticular layer
G. epidermis
H. dermis

__D___ 1. Translucent cells containing keratin
__A___ 2. Dead cells
__E___ 3. Dermis layer responsible for fingerprints
__F___ 4. Vascular region
__B___ 5. Epidermal region of rapid cell division; deepest epidermal layer __G___ 6. Scale-like cells full of keratin that constantly flake off __E___ 7. Site of elastic and collagen fibers
___B__ 8. Site of melanin formation
___H__ 9. Major skin area that gives rise to hair and nails

Fill in the blanks.
1. Blueness of the skin due to low oxygen concentration in the blood is called _CYANOSIS________. 2. A muscle that causes a hair to stand on end is called a/an _ARRECTOR PILI MUSCLE__. 3. Cerumen is more commonly known as __EARWAX__.

4. The process of removing burned skin from a patient is called _DEBRIDING___. 5. Caucasian skin gets its color mainly from the white dermal collagen and the blood pigment ____HEMOGLOBIN_____. 6. The dietary pigment __CAROTENE__sometimes gives it a yellowish tint, but if both the skin and the whites of the eyes are tinted this color, a disorder called ___JAUNDICE__may be suspected. 7. Black, brown, tan, and reddish hues are all due to various amounts of__MELANIN____. 8. Choking or cardiac arrest may cause an abnormal skin color called _CYANOSIS_, due to a low level of oxygen in the blood. 9. The redness of blushing or sunburn is called_ERYTHEMA__. 10. Two skin markings that develop before birth are birthmarks, clinically known as _HEMANGIOMAS__, and fingerprints, or __FRICTION RIDGES_. _FLEXION_creases form after birth as the joints are repeatedly flexed. Using the key choices below, identify the indicated structures.

A. stratum basale
B. dead keratinocytes
C. merkel cell
D. stratum corneum
E. sensory nerve ending
F. stratum spinosum
G. stratum lucidum
H. melanocyte
I. living keratinocytes
J. Langerhans cell


11. What does this picture represent EPIDERMIS


Using the key choices below, identify the indicated structures.

A. arrector pili muscle
B. hair bulb
C. region of cell division and hair growth
D. dermal papilla
E. sebaceous gland
F. hair follicle
G. hair root
H. apocrine sweat gland
I. blood capillaries
J. hair receptors



Fill in the blanks.
1. The nails and part of the hair are made of a durable, extensively cross-linked protein called hard _KERATIN______. 2. A hair grows in a diagonal epithelial tube called a _FOLLICLE______. 3. Coarse, pigmented hair is called _TERMINAL HAIR_, whereas most of the body hair of women and children is called __VELLUS_. Most of the hair within this tube is called the root, but it has a dilation at its base called the BULB__, where it derives all its nutrition from blood capillaries. 4. The surface of a hair consists of scaly, overlapping cells called the hair __CUTICLE__. Most hair colors are due to melanin, but red hair gets its color from a pigment called _TRICHOSEDARIN__. 5. Chills and fear often cause the hair to stand on end because of the action of the _ARRECTOR PILI_ muscles of the hair follicles. 6. Excessive hairiness is called hypertrichosis, while thinning of the hair is called _ALOPECIA________. Using the key choices below, identify the indicated structures.

A. lunule
B. nail fold
C. nail edge
D. nail...
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