Identify the region and the layer of skin
Question 1
0 / 5 pts
Identify the region and the layer of skin that is highlighted in blue. (Also indicated by the arrow, below) *NOTE: To receive full credit you must label two regions.
Your Answer:
papilary region of the dermis
Stratum spinosum; Epidermis
(Must have both for full credit)
Question 2
5 / 5 pts
A- Identify the sensory cell receptor highlighted in blue, below, also indicated by the arrow.
B- What sensory information is detected by this type of receptor?
Your Answer:
A - Pacinian Corpuscles is amechanoreceptor that detects pressuer applied to the skin.Pacinian Corpuscles detects vibration.
- A) Pacinian corpuscle
B) Detects pressure (mechanoreceptor)
Question 3
3 / 3 pts
The layers of the epidermis, from superficial to deep are:
Correct!
Stratum corneum, stratum granulosum, stratum spinosum, stratum basale.
Stratum basale, stratum spinosum, stratum granulosum, stratum corneum
Stratum spinosum, stratum granulosum, stratum corneum, Stratum basale
Stratum corneum, stratum spinosum, stratum granulosum, stratum basale.
Question 4
4 / 4 pts
Endocrine glands secrete ______; Exocrine glands secrete ____.
- for body-wide distribution, into an epithelial lining
- into an epithelial lining, for body-wide distribution
- through a duct, into the bloodstream
- into the bloodstream, through a duct
Correct!
- A&D
- B&C
Question 5
3 / 3 pts
Which of the following is true regarding the epidermis:
It is highly vascular.
It is comprised of five distinct layers.
Correct!
The basement membrane contains its blood supply.
Epidermal ridges change throughout a person’s lifetime.
Question 6
7.5 / 10 pts
Match the cell with its single best description, using each description only once.
Correct!
Keratinocytes
You Answered
Fibroblasts
Correct Answer
Produces collagen
Correct!
Melanocytes
Correct!
Langerhans cells
Other Incorrect Match Options:
- Detects light touch
- Detects pain
Question 7
3 / 3 pts
A person touches a hot cup of coffee. What type of sensory organ detects this information?
Your Answer:
Thermoreceptors
Thermoreceptor
Question 8
3 / 3 pts
Merkel cells are embedded in what layer of the skin?
Your Answer:
Epidermis
Epidermis
Question 9
4 / 4 pts
In your own words, how can the skin be used to determine if a person is dehydrated?
Your Answer:
If you pinch the skin on the back of a persons hand,if it stays pinched instead of going back, it means this person is dehydrated.
A person who is dehydrated has decreased water content in the dermal layer of their skin. A person can be tested for dehydration by pinching the skin on the back of the hand. One indicator of dehydration is when the skin does not recoil back to its normal shape but instead stays “ridged”.
Question 10
5 / 5 pts
What is the name and function of the structure below? (Highlighted in blue, also indicated by the arrow)
Your Answer:
Arrector pilli muscle. It function is to contract when our body gets cold.
Arrector pili, a smooth muscle which connects to each hair follicle. It contracts when the body is cold or experiences emotional responses.
Question 11
5 / 5 pts
What is the name and function of the structure below? (Highlighted in blue, also indicated by the arrow)
Your Answer:
sebaceous gland. It secretes sebum that helps our skin and hair from drying
Sebaceous gland (oil gland) produces oil (sebum) to protect the skin and hair from drying.
Question 12
2 / 2 pts
All of the following are functions of skin except:
Absorb UV rays
Thermoregulation
Perspiration
Correct!
Produce vitamin K
Question 13
2 / 2 pts
The thickest region of the dermis is the:
Correct!
Reticular
Papillary
Basement membrane
Subcutaneous
None of the above are layers of the dermis
Question 14
2 / 2 pts
The hypodermis is comprised mainly of:
Correct!
Adipocytes
Reticular cells
Dermatomes
Sebaceous glands
Question 15
2 / 2 pts
What is a contusion?
A third degree burn
An infection in the epidermis
Correct!
Damage to a broken blood vessel
Subcutaneous injection
Question 16
2 / 2 pts
Information from a dermatome carries information from:
The brain
The spinal cord
A gland
Correct!
The skin
Question 17
10 / 10 pts
This injury, seen below, is best described as what degree of burn? Explain what layer/s of skin are damaged in this type of burn.
Your Answer:
Second degree burn. Epidermis and part of dermis is damaged.
Second-degree burn, also called a partial thickness burn
The epidermis and dermis layers of the skin was damaged.
(Optional: The burned area burned becomes red and painful, forming blisters)
Question 18
10 / 10 pts
Answer the following clinical case scenario:
Your patient was injured in a house fire. The skin sustained damage through the epidermis, dermis, hypodermis, and some muscle tissue.
1- What degree of burn best describes your patient’s injury?
2- Would your patient experience pain in the injured area? Why or why not?
Your Answer:
fourth degree. Because nerve endings are damaged the patient may or may not feel pain.
-4th degree
-No, fourth-degree burns damage the epidermis, the dermis, the hypodermis, and underlying tissue such as muscle or bone. Because the nerve endings are destroyed there is no sensation in the affected burn area.
Question 19
2.5 / 2.5 pts
This part of a hair contains blood and nervous supply:
Keratin
Root
Shaft
Correct!
Bulb
Question 20
2.5 / 2.5 pts
Hair is made up of:
Living epidermal cells converted to keratin
Correct!
Dead epidermal cells converted to keratin
Living epidermal cells converted to collagen
Dead epidermal cells converted to collagen
Question 21
2.5 / 2.5 pts
Nails are hard, dead cells which have been converted to _____
Correct!
Keratin
Collagen
Calcium
Corneum
Question 22
2.5 / 2.5 pts
The nail _____ is the visible portion of the nail.
root
Correct!
body
matrix
phalanx
Question 23
2 / 2 pts
Why would a person receive a skin graft?
Your Answer:
beacuse the skin is severly damaged or persons burn covers large area
(1) Skin grafting decreases recovery time and prevents infection
OR
(2) If skin has been damaged severely and/or covers a large surface area
Question 24
2 / 2 pts
What substance from the blood accumulates to form a clot?
White blood cells
Red blood cells
Correct!
Platelets
Macrophages
Question 25
2 / 2 pts
Mast cells secrete what chemical?
Collagen
Correct!
Histamine
Platelets
Heparin
Question 26
2 / 2 pts
Macrophages_____
secrete histamine.
remove fibroblasts.
Correct!
engulf bacteria.
replace old tissue matrix.
Question 27
2 / 2 pts
A scar ______.
is called clotting.
maintains full function of the original tissue.
Correct!
is an overgrowth of fibrous connective tissue.
supports the tissue matrix until the old cells are developed.
hihi
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