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5. Integumentary System

Hair

5. Integumentary System

Hair

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Structure Of Hair Follicle - Hair Color - How Does Hair Growth Work

Structure Of Hair Follicle - Hair Color - How Does Hair Growth Work

Hair, Hair follicle, and Nail Structure

Hair, Hair follicle, and Nail Structure

Practice this topic

Multiple Choice

Follicles that give rise to eyebrows remain active longer than follicles of the scalp.

Multiple Choice

Keratin is found in hair and nails.

Multiple Choice

Hirsutism is a condition that is characterized by __________.

Multiple Choice

Terminal hair is located in all of the following areas EXCEPT the __________.

Textbook Question

Which of the following is not a function of body hair in humans?

a. Protection from the environment

b. Sensation

c. Protection from mechanical trauma

d. Regulation of blood flow

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Textbook Question

Fill in the blanks: The portion of the hair that projects from the surface of the skin is the____, and the portion within the dermis is the ___, which is embedded in a(n)_____ . The portion of the hair that contains cells that undergo mitosis during the growth stage of the hair is known as the .

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Textbook Question

Why don't you bleed when you cut your nails? Why don't you bleed when a hair is pulled?

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Textbook Question

Manufacturers of shampoos and conditioners often claim their products contain vitamins that are necessary to keep hair shafts healthy. Do hair shafts need vitamins? (Hint: Vitamins are required for cells to carry out certain reactions.) Why or why not? How valid are these claims?

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Textbook Question

The hair and nails are sometimes called accessory organs. Are these structures technically organs? Why or why not?

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Textbook Question

Multiple Choice More than one choice may apply. Which structure is not associated with a hair? a. Shaft b. Cortex c. Matrix d. Cuticle e. Lunule

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Textbook Question

Multiple Choice More than one choice may apply. In investigating the cause of thinning hair, which of the following questions needs to be asked? a. Is the diet deficient in proteins? b. Is the person taking megadoses of vitamin C? c. Has the person been exposed to excessive radiation? d. Has the person recently suffered severe emotional trauma?

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Textbook Question

An arrector pili muscle a. is associated with each sweat gland, b. can cause a hair to stand up straight, c. enables each hair to be stretched when wet, d. provides new cells for continued growth of its associated hair.

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Textbook Question

The accessory structures of the integument include the (a) blood vessels, glands, muscles, and nerves, (b) tactile discs, lamellar corpuscles, and tactile corpuscles, (c) hair, skin, and nails, (d) hair follicles, nails, sebaceous glands, and sweat glands.

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Textbook Question

The portion of the hair follicle where cell divisions occur is the (a) shaft, (b) matrix, (c) root hair plexus, (d) cuticle.

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Textbook Question

Is a bald man really hairless? Explain.

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Textbook Question

What are arrector pili? What do they do?

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Textbook Question

What is the function of the arrector pili muscles?

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Textbook Question

Describe the process of hair formation, and list several factors that may influence a. growth cycles and b. hair texture.

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Textbook Question

Tanya, a 30-year-old resident of a mental hospital, has an abnormal growth of hair on the dorsum of her right index finger. The orderly comments that she gnaws on that finger continuously. What do you think is the relationship between Tanya's gnawing activity and her hairy finger?

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Textbook Question

Many people change the natural appearance of their hair, either by coloring it or by altering the degree of curl in it. Which layers of the hair do you suppose are affected by the chemicals added during these procedures? Why are the effects of the procedures not permanent?

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