Anatomy I Lab Exam II Flashcards

Questions and Answers

Name three structures that are associated with the integumentary system.

Nails, hair, glands

Which one of the three layers (epidermis, dermis, subcutaneous tissue) is not part of the integument?

Hypodermis

Which one of the two main layers of the dermis is most superficial?

Epidermis

What is the most common connective tissue fiber in the dermis?

Collagenous fibers Signup and view all the answers

The release of heat from the body by blood vessels occurs in what main layer of the integument?

Dermis Signup and view all the answers

Which stratum is the deepest layer of the epidermis?

Stratum basale Signup and view all the answers

Which stratum of the epidermis is the most superficial?

Stratum corneum Signup and view all the answers

Approximately how long does it take for the epidermis to renew itself?

6 weeks Signup and view all the answers

What cell type produces a pigment that darkens the skin?

Melanocytes Signup and view all the answers

What material makes the epidermis tough?

Keratin Signup and view all the answers

What integumentary gland secretes oil?

Sebaceous gland Signup and view all the answers

Which kind of sweat gland (eccrine, apocrine) is involved in evaporative cooling?

Eccrine Signup and view all the answers

What part of the hair is found on the outside of the skin?

Shaft Signup and view all the answers

What does an arrector pili muscle do?

Contracts, causing hair to stand on end Signup and view all the answers

The outermost portion of the hair is known as the?

Cuticle Signup and view all the answers

The hair of the axilla is considered _____ hair.

Determinate Signup and view all the answers

Explain how electrolysis might destroy the process of hair growth in relation to the hair bulb.

Electrical 'burning' of the hair bulb destroys the vascular supply to the hair, thus preventing growth of the hair. Signup and view all the answers

Explain the fallacy of a person's hair turning white overnight.

Sudden shock may cause a radical change in hair color, but that occurs in the hair root. It takes time for the hair to grow out and, as it does, it may turn white. Signup and view all the answers

Explain the fallacy of 'feeding' the hair, as claimed by some cosmetics firms.

Hair is fed by food that goes in the body. Replacing oils lost from shampooing can be healthy for hair. Signup and view all the answers

What are canaliculi?

Lacunae are connected by these thin tubes that provide passageways through the bone. Signup and view all the answers

What are modular units of bone called?

Osteons Signup and view all the answers

What does each osteon have in the middle?

Central canal Signup and view all the answers

What are lacunae?

Rings of dark spots, spaces that the osteocytes (bone cells) occupied in living tissue. Signup and view all the answers

What are lamellae?

Osteon has layers of dense mineral salts that form concentric rings between the lacunae. Signup and view all the answers

The hyoid bone is part of the ____ skeleton.

Axial Signup and view all the answers

How many bones are in the appendicular skeleton?

126 Signup and view all the answers

How many bones are in the axial skeleton?

80 Signup and view all the answers

Study Notes

Integumentary System

Main organ is the skin; associated structures include nails, hair, and glands.
Hypodermis (subcutaneous tissue) is not part of the integument.
Epidermis is the most superficial layer of the skin.
Collagenous fibers are the most common connective tissue fiber in the dermis.
Heat release occurs through blood vessels in the dermis.
Stratum basale is the deepest layer of the epidermis; stratum corneum is the most superficial.
Epidermis takes approximately 6 weeks to renew itself.
Melanocytes produce the pigment that darkens skin, while keratin makes the epidermis tough.
Sebaceous glands secrete oil; eccrine sweat glands are involved in evaporative cooling.
Hair shaft is the external part of hair, while the cuticle is the outermost portion of the hair.
Arrector pili muscles contract to make hair stand on end.
Axilla hair is considered determinate hair.
Electrolysis involves electrical burning of the hair bulb, destroying the hair's vascular supply, preventing hair growth.
Sudden changes in hair color do not happen overnight; changes occur at the hair root and take time as hair grows out.
Hair cannot be "fed" from outside; nourishment comes from within the body, but replacing lost oils is beneficial.

Bone Structure

Canaliculi are thin tubes connecting lacunae, providing passageways through bone.
Osteons are the modular units of bone.
Each osteon contains a central canal, which is a hole in the middle.
Lacunae are spaces occupied by osteocytes (bone cells) in living tissue and appear as rings of dark spots.
Lamellae are layers of dense mineral salts forming concentric rings between the lacunae.

Skeleton Anatomy

The hyoid bone is part of the axial skeleton.
The appendicular skeleton consists of 126 bones.
The axial skeleton is made up of 80 bones.

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Test your knowledge of the integumentary system with these flashcards focused on Anatomy I Lab Exam II. Covering key structures, layers, and definitions, this quiz is perfect for students preparing for their lab exams.