Anatomy and Physiology: Exam 2

Anatomy and Physiology: Exam 2 /

Actual Test Questions with Detailed Verified Answers / Already Graded A / 2025.Quiz____?Functions of the Integumentary System - Answer✓✓ -Resistance to trauma and infection -Prevents loss or gain of water -Vitamin D synthesis -Sensory receptors for heat, cold, touch, texture, pressure, vibration, and tissue injury -Thermoregulation Quiz____?How does skin resist trauma and infection? - Answer✓✓ -Skin has low pH to reduce bacteria and fungi -Cells are packed closely together with tough protein called keratin Quiz____?Name 3 ways the integumentary system thermoregulates? - Answer✓✓ -Glands release sweat for evaporative cooling

• Vasoconstriction

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• Vasodilation

Quiz____?

Define: Vasoconstriction -

Answer✓✓ narrowing of blood vessels, reduces heat loss Quiz____?

Define: Vasodilation -

Answer✓✓ widening of blood vessels, increases heat loss Quiz____?What are the 2 main parts of the integumentary system? - Answer✓✓ Epidermis- outer layer Dermis- underlying connective tissue *Hypodermis not really part of the skin!* Quiz____?What does the epidermis primarily consist of? - Answer✓✓ keratinized stratified squamous epithelium Page 2 of 40 2 / 4

Quiz____?What are the epidermal derivatives? - Answer✓✓ glands, hair, nails Quiz____?What are the 4 main cell types in the epidermis? - Answer✓✓

• Karatinocytes
• Melanocytes
• Tactile (Merkel) cells
• Dendritic (Langerhans) cells

Quiz____?Keratinocytes (functions) - Answer✓✓ most numerous cell type, make fibrous protein keratin Quiz____?Melanocytes (functions) - Answer✓✓ synthesize pigment called melanin Quiz____?Tactile cells (functions and 2nd name) - Page 3 of 40 3 / 4

Answer✓✓ also called Merkel cells, receptors for the sense of touch, associated with a dermal nerve fiber Quiz____?Dendritic cells (functions and 2nd name) - Answer✓✓ macrophages (big phagocytic cells) that kill microbes Quiz____?What are the layers of the epidermis (list from bottom up)? - Answer✓✓

• Stratum basale
• Stratum spinosum
• Stratum granulosum
• Stratum lucidum
• Stratum corneum

Quiz____?What layer of the epidermis is only found in thick skin? - Answer✓✓ Straum lucidum Quiz____?How many layers are found in the stratum basale? - Page 4 of 40

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