A&p Bio 141: Tissue Types And Structures In The Epidermis And The Dermis
If you reviewed over the flashcards I created for this test and have been studying the epidermis and dermis, you should do well with this quiz.
Questions and Answers
- 1.
acts as a shock absorber and an insulator that reduces heat loss from the body.
- A.
Keratin
- B.
Langerhans cells
- C.
Hypodermis
- D.
Stratum spinosum
- E.
Ceruminous
Correct Answer
C. HypodermisExplanation
The hypodermis is the deepest layer of the skin and is made up of fat cells. It acts as a shock absorber, providing cushioning and protection to the underlying tissues and organs. Additionally, the hypodermis acts as an insulator, helping to regulate body temperature by reducing heat loss from the body.Rate this question:
-
- 2.
Any place where a joint flexes.
- A.
Papillary layer
- B.
Sutures
- C.
Tension lines
- D.
Flexure lines
- E.
Stratum granulosum
Correct Answer
D. Flexure linesExplanation
Flexure lines are the areas on the skin where a joint flexes. These lines are formed due to repeated movement and bending of the skin over time. They are also known as flexion creases or skin folds. Flexure lines can be found in various parts of the body, such as the elbows, knees, knuckles, and neck. The presence of flexure lines allows for easy movement and flexibility of the skin in these areas.Rate this question:
-
- 3.
Which is a cell in the epidermis?
- A.
Karatinocytes
- B.
Melanocytes
- C.
Epidermal dendric cells
- D.
Tactile cells
- E.
All of the above
Correct Answer
E. All of the aboveExplanation
All of the options listed are cells found in the epidermis. Keratinocytes are the most abundant cells in the epidermis and produce the protein keratin, which provides strength and protection to the skin. Melanocytes produce the pigment melanin, which gives color to the skin and protects it from UV radiation. Epidermal dendritic cells are immune cells that help protect against pathogens. Tactile cells, also known as Merkel cells, are involved in the sense of touch. Therefore, all of these cells are present in the epidermis.Rate this question:
-
- 4.
Redness on the skin from a burn, heat/temperature, infection, inflammation, or trauma is known as:
- A.
Jaundice
- B.
Erythema
- C.
Pallor
- D.
Cyanotic
- E.
Adrenal
Correct Answer
B. ErythemaExplanation
Erythema is the correct answer because it refers to redness on the skin caused by various factors such as burns, heat/temperature, infection, inflammation, or trauma. Jaundice, on the other hand, is a condition characterized by yellowing of the skin and eyes due to liver dysfunction. Pallor refers to paleness of the skin, while cyanotic describes a bluish discoloration caused by inadequate oxygenation of the blood. Adrenal is unrelated to the given question and does not pertain to skin redness.Rate this question:
-
- 5.
Black and blue bruising on the skin is known as which two?
- A.
Ecchymosis
- B.
Carotene
- C.
Erythema
- D.
Hematoma
- E.
Adrenal
Correct Answer(s)
A. Ecchymosis
D. HematomaExplanation
Black and blue bruising on the skin is known as ecchymosis and hematoma. Ecchymosis refers to the discoloration of the skin caused by the leakage of blood into the surrounding tissues due to trauma or injury. Hematoma, on the other hand, is a localized collection of blood outside the blood vessels, usually resulting from a broken blood vessel. Both ecchymosis and hematoma can cause black and blue bruising on the skin.Rate this question:
-
- 6.
True or False:Basal cell carcinoma is the most dangerous skin cancer because it is highly metastic and resistand to chemotherapy.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is false because basal cell carcinoma is actually the least dangerous type of skin cancer. It is slow-growing and rarely spreads to other parts of the body. Additionally, basal cell carcinoma is highly responsive to treatment, including surgery and radiation therapy. While it is important to treat basal cell carcinoma early to prevent damage to surrounding tissues, it is not considered highly metastatic or resistant to chemotherapy.Rate this question:
-
- 7.
True or False:Stratum lucidum is only present in thick skin.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Stratum lucidum is a layer of the epidermis that is found only in areas of the body with thick skin, such as the palms of the hands and the soles of the feet. It is not present in areas with thin skin, such as the arms or legs. Therefore, the statement that Stratum lucidum is only present in thick skin is true.Rate this question:
-
- 8.
A hypodermic needle is injected into the skin. Identify the first integumentary structure through which the needle will pass.
- A.
Papillary layer
- B.
Epidermis
- C.
Reticular layer
- D.
Hypodermis
Correct Answer
B. EpidermisExplanation
The epidermis is the outermost layer of the skin and is the first integumentary structure that the hypodermic needle will pass through when injected into the skin. It acts as a protective barrier and helps regulate the loss of water and other substances from the body. The epidermis is made up of several layers of cells, including the stratum corneum, stratum granulosum, stratum spinosum, and stratum basale.Rate this question:
-
- 9.
Sebaceous glands are located in all of the following areas, except the:
- A.
Abdominal region.
- B.
Palmar region.
- C.
Brachial region.
- D.
Scalp.
- E.
Axillary region.
Correct Answer
B. Palmar region.Explanation
Sebaceous glands are found all over the body, except in the palms of the hands and soles of the feet. The abdominal, brachial, scalp, and axillary regions all have sebaceous glands. However, the palmar region, which refers to the palms of the hands, does not have sebaceous glands.Rate this question:
-
- 10.
The dermis is primarily composed of which tissue type?
- A.
Dense regular connective tissue
- B.
Dense irregular connective tissue
- C.
Reticular connective tissue
- D.
Areolar connective tissue
- E.
Stratified squamous epithelial tissue
Correct Answer
B. Dense irregular connective tissueExplanation
The dermis is primarily composed of dense irregular connective tissue. This type of tissue provides strength, support, and flexibility to the skin. It is characterized by collagen fibers that are arranged in a random pattern, allowing the dermis to withstand tension and stress from various directions. Dense irregular connective tissue also contains fibroblasts, which produce and maintain the extracellular matrix of the tissue. This composition makes the dermis well-suited for its role in protecting and supporting the body's underlying structures.Rate this question:
-
- 11.
What is the primary function of melanin?
- A.
Produces vitamin D
- B.
Produces sebum
- C.
Determines skin color
- D.
Provides protection against the sun's UV rays
- E.
Uptake of calcium from the diet
Correct Answer
D. Provides protection against the sun's UV raysExplanation
Melanin is a pigment produced by specialized cells called melanocytes. Its primary function is to provide protection against the harmful effects of the sun's ultraviolet (UV) rays. When the skin is exposed to UV radiation, melanocytes produce more melanin, which helps to absorb and scatter the UV rays, preventing them from damaging the DNA in skin cells. This protection helps to reduce the risk of sunburn, skin damage, and skin cancer caused by excessive UV exposure.Rate this question:
-
- 12.
Which of the following is NOT considered a critical burn?
- A.
Third-degree burns on the feet or hands
- B.
Third-degree burns on the face
- C.
Twenty-five percent of the body has second-degree burns
- D.
Over 10% of the body has third-degree burns
- E.
Thirty percent of the body has first degree burns
Correct Answer
E. Thirty percent of the body has first degree burnsExplanation
Thirty percent of the body having first-degree burns is not considered a critical burn because first-degree burns only affect the outer layer of the skin and are considered minor burns. They typically cause pain, redness, and swelling but do not result in blistering or damage to deeper layers of the skin. Critical burns usually refer to second-degree burns that cover a large area of the body, third-degree burns that affect sensitive areas like the face or hands, or burns that involve the airway or major joints.Rate this question:
-
- 13.
Which of the following cells is part of the immune system
- A.
Keratinocyte
- B.
Melanocyte
- C.
Langerhans' cell
- D.
Merkel cell
Correct Answer
C. Langerhans' cellExplanation
Langerhans' cells are a type of immune cell found in the skin and mucous membranes. They are part of the body's immune system and play a role in recognizing and presenting foreign substances to other immune cells. Langerhans' cells are important for initiating an immune response against pathogens and are involved in allergic reactions and autoimmune diseases.Rate this question:
-
- 14.
A hematoma in the skin appears as
- A.
A localized brown pigmentation.
- B.
Black and blue marks.
- C.
An overall blue discoloration of the skin.
- D.
An overall reddish discoloration of the skin.
Correct Answer
B. Black and blue marks.Explanation
A hematoma in the skin appears as black and blue marks. This is because a hematoma is a collection of blood outside of blood vessels, usually caused by injury or trauma. When blood vessels rupture, blood pools under the skin, resulting in discoloration. Initially, the hematoma appears as a reddish or purplish mark, but as it heals, it changes color to black and blue. This is due to the breakdown of red blood cells and the reabsorption of blood pigments, resulting in the characteristic bruise-like appearance.Rate this question:
-
Back to top