Integumentary System 8th Grade SJS

Which of the following is not true about the hair and nails in the integumentary system?

• Nails are accessory organs of the skin made of sheets of hardened keratinocytes and found on the distal ends of the fingers and toes.

• Fingernails and toenails reinforce and protect the end of the digits and are used for scraping and manipulating small objects.

• Hair helps to protect the body from UV radiation by preventing sunlight from striking the skin.

• Hair does not insulate the body by trapping warm air around the skin.

Which are the three main glands of the Integumentary System?

• Hypodermal gland, Sudoriferous glands, and Sebaceous glands

• Ecrrine gland, Apocrine glands, and Sudoriferous glands

• Keratinocyte gland, Ecrrine gland, and Apocrine glands

• Sudoriferous glands, Ceruminous glands and Sebaceous glands

Which of the following is not part of the pigments that form human skin color?

• Melanin

• Carotene

• Hemoglobin

• Keratinocyte

Find the incorrect statement when talking about the skin protection.

• The skin provides protection to its underlying tissues from pathogens, mechanical damage, and UV light.

• Pathogens, such as viruses and bacteria, are unable to enter the body through unbroken skin due to the outermost layers of epidermis containing an unending supply of tough, dead keratinocytes. This protection explains the necessity of cleaning and covering cuts and scrapes with bandages to prevent infection.

• Minor mechanical damage from rough or sharp objects is mostly absorbed by the skin before it can damage the underlying tissues. Sebaceous cells reproduce constantly to quickly repair any damage to the skin.

• Melanocytes in the epidermis produce the pigment melanin, which absorbs UV light before it can pass through the skin. UV light can cause cells to become cancerous if not blocked from entering the body.

Checkout the layers of the skin in order from the outer most layer to the inner most layer.

• Epidermis

• Dermis

• Hypodermis

• Hyperdermis

Which is the only layer you cans see?

• Fatty Tissue

• Derimis

• Heypodermis

• Epidermis

Which of the following is NOT found in the Dermis?

• Nervous Tissue

• Blood Vessels

• Fatty Tissue

• Hair Follicles

The process of smooth muscles in the walls of blood vessels in the dermis contracting to reduce the flood of blood to the skin.

• Vasoconstriction

• Vasodilation

The process through which smooth muscle lining the blood vessels in the dermis relax and allow more blood to enter the skin.

• Vasoconstriction

• Vasodilation

Approximately how many sudoriferous glands or sweat glands do we have distributed through your body?

• 1 million

• 3 million

• 5 million

• 7 million