Bates Chapter 9 (The Integumentary System) Already Graded A

Bates Chapter 9 (The Integumentary System) Already Graded A 1. What is the primary function of the skin? A) To synthesize vitamin D B) To regulate body temperature C) To provide nonverbal communication D) To provide a barrier to protect the body Correct answer: D) To provide a barrier to protect the body 2. What does the skin's barrier function protect against? A) Only mechanical injuries B) Only chemical injuries C) All of the above (mechanical, chemical, thermal, and UV light sources) D) Only microbial penetration Correct answer: C) All of the above (mechanical, chemical, thermal, and UV light sources) 3. How does the skin regulate body temperature? A) By storing heat through subcutaneous insulation B) By dissipating heat through sweat glands C) By synthesizing vitamin D D) By providing nonverbal communication Correct answer: B) By dissipating heat through sweat glands 4. What is synthesized by the skin from cholesterol in the presence of UV light? A) Carotene B) Melanin C) Vitamin D D) Bilirubin Correct answer: C) Vitamin D 5. Which layer of the skin is thin, devoid of blood vessels, and divided into two layers? A) Epidermis B) Dermis C) Subcutaneous layer D) Hypodermis Correct answer: A) Epidermis bilirubin ️bile pigment formed in the liver from hemoglobin hemoglobin ️which circulates in the red cells and carries most of the oxygen of the blood, exists in two forms oxyhemoglobin ️hemoglobin combined with oxygen a bright red pigment, predominates in the arteries and capillaries. An increase in blood flow through the arteries to the capillaries causes a reddening of the skin (e.g., with blushing), whereas the opposite change usually produces pallor. The skin of light-colored people is normally redder on the palms, soles, face, neck, and upper chest. deoxyhemoglobin ️hemoglobin without oxygen as blood passes thru capillary bed, it loses its oxygen a darker and somewhat bluer pigment. An increased concentration of deoxyhemoglobin in cutaneous blood vessels gives the skin a bluish cast known as cyanosis. cyanosis ️blue discoloration of the skin caused by a lack of adequate oxygen in the blood central cyanosis ️indicates decreased oxygenation in the patient. If the oxygen level in the arterial blood is low PERIPHERAL CYANOSIS ️If the oxygen level is normal occurs when cutaneous blood flow decreases and slows, and tissues extract more oxygen than usual from the blood. _______________ cyanosis may be a response to anxiety or a cold environment. vellus hair ️fine hair found on children and adult female non pigmented terminal hair ️scalp hair and eyebrows Long, coarse, pigmented hair found on the scalp, legs, arms, and bodies of males and females. nail plate ️Hardened keratin plate covering the nail bed. nail bed ️the portion of the living skin on which the nail plate sits i