Human Physiology: Integumentary System

Which of the following is not a direct component of the integumentary system?

• Epithelial cells

• White blood cells

• Sweat glands

• Sebaceous glands attached to hair follicles

Which cell type produces melanin?

• Keratinocyte

• Carotene

• Melanocyte

• Langerhans

Which factor determines the amount of melanin activity in an area?

• The length of melanocyte tentacles and the number of keratinocytes

• The number of melanocytes

• Melanocyte

• Stratum Basale

An individual has a lighter skin tone, while another individual has a darker skin tone. Which statement below best describes the difference between their epithelium?

• The individual with a darker skin tone has more melanin activity, and double the melanocytes of the lighter-skinned individual

• The individual with lighter skin tone has less melanin activity, but both individuals have the similar number of melanocytes

• The individual with lighter skin tone has more melanin activity, but both individuals have the same number of melanocytes

• There is no difference in their skin cells

Tags

NGSS.HS-LS3-2

An individual is born with no freckles but gains them as they age. What causes the appearance of freckles on the skin?

• Patches of low hemoglobin

• Patches of high carotene

• Patches of low melanocyte activity

• Patches of high melanocyte activity

Tags

NGSS.HS-LS3-2

Which statement is true about skin color formation?

• Melanin production begins at 16 weeks old

• Hemoglobin helps with keratinocyte proliferation

• Melanin activity always remains constant throughout an individual's life

• The shorter the melanocyte tentacles, the higher the melanin activity

Tags

NGSS.HS-LS3-2

Wound repair can be compared to repairing a home. Which phase of the healing process is similar to containing a burst pipe?

• Proliferative

• Remodeling

• Hemostasis

• Inflammation

What is the primary purpose of a fibrin clot?

• To reduce the appearance of a scar over time

• To phagocytize bacteria

• To call other cells to the wound site

• To seal broken capillaries and prevent infection

Growth factors are responsible for calling additional cells to a wound. Which types of cells might respond to the growth factors?

• Fibroblasts and melanocytes

• Connective tissue cells

• Epithelial and muscle cells

• Neutrophils and macrophages

Which of the following is NOT a sign of the inflammatory phase?

• Redness

• Fracture

• Swelling

• Increased pain