Exam 2 Slide Show Integumentary (pt4) Flashcards

1
Q

New cells produced by mitosis in the hair matrix, push the growing hair through what?

A

The pilary canal

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2
Q

What is the opening where hair actually emerges?

A

The pilary canal

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3
Q

Within the bulb of the hair, is a germinal layer of cells called what?

A

The matrix

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4
Q

Where does the hair matrix arise from?

A

The stratum basale

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5
Q

Where is the site of cell division that produces the hair?

A

The matrix

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6
Q

What is associated with hair?

A

Sebaceous (oil) glands, arrector pili, and hair root plexuses

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7
Q

The arrector pili is composed of what?

A

a bundle of smooth muscle

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8
Q

Under physiologic or emotional stress (cold, fright) autonomic nerve endings stimulate what muscles, which contract, causing “goose bumps”

A

arrectores pilorum

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9
Q

What accessory of the hair, helps regulate temperature and make one look larger?

A

Arrector pili

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10
Q

What acts as a receptor to generate nerve impulses when hair shafts are moved?

A

The hair root plexuses

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11
Q

What is the hair root plexuses composed of?

A

Groups of dendrites and nerve fiber endings

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12
Q

Each nail consists of what?

A

A nail body, a free edge, and a nail root

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13
Q

Where does new growth occur in a nail?

A

from the root.

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14
Q

What are nails made of?

A

Tightly packed, hard, keratinized epidermal cells.

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15
Q

How do cells of the nail matrix produce growth?

A

By dividing mitotically

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16
Q

What are the oil glands of the skin called?

A

Sebaceous glands

17
Q

Where are sebaceous glands absent from?

A

Palms and soles

18
Q

What do sebaceous glands secrete?

A

Sebum

19
Q

What does sebum do?

A
  1. Keeps hair from drying
  2. Prevents excessive evaporation of water from the skin
  3. Keeps skin soft and pliable
  4. Inhibits growth of some bacteria
20
Q

What type of glands are sebaceous glands?

A

They are holocrine glands

21
Q

What are the sweat glands of the skin called?

A

Sudoriferous glands

22
Q

What are the two main types of sudoriferous glands?

A

Eccrine sweat glands and Aprocrin sweat glands

23
Q

Which sweat gland is more common?

A

Eccrine sweat glands

24
Q

Do eccrine glands function in thermoregulation?

A

Yes

25
Q

What are aprocrine sweat glands found in association with?

A

Hair that develops at puberty