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Biology 101 - Respiratory System and Tissues Part 3

Biology13 CardsCreated about 2 months ago

This deck covers key concepts related to the respiratory system and various tissue types, focusing on their structure, function, and role in the human body.

The cells that form capillary walls are part of which major tissue type?

Capillary walls are composed of epithelial tissue, specifically simple squamous epithelium. This tissue is only one cell thick, which helps facilitate diffusion.
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Key Terms

Term
Definition
The cells that form capillary walls are part of which major tissue type?
Capillary walls are composed of epithelial tissue, specifically simple squamous epithelium. This tissue is only one cell thick, which helps facilitate...
The lining of an alveolus is mainly composed of simple squamous epithelium. If alveoli were instead formed from stratified epithelium, what would result?
Gas exchange would not occur or would be severely limited. Stratified epithelium is composed of many layers of cells, and is more impenetrable than si...
Blood, cartilage, and bone are part of which basic tissue type?
These cell types are examples of connective tissue. Connective tissue usually fulfills a structural role and is surrounded by an extracellular matrix....
Name the largest organ in the integumentary system.
Skin. The skin is the largest organ not only in the integumentary system, but in the entire human body.
What are three main functions of the skin?
Physical protection of internal organs. Regulation of body temperature. Prevention of water loss.
What is the difference between sebaceous glands and sweat glands?
Sebaceous glands secrete oil, or sebum, to prevent the skin from drying out. These glands are often found near the base of hair follicles. Sweat gland...

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TermDefinition
The cells that form capillary walls are part of which major tissue type?
Capillary walls are composed of epithelial tissue, specifically simple squamous epithelium. This tissue is only one cell thick, which helps facilitate diffusion.
The lining of an alveolus is mainly composed of simple squamous epithelium. If alveoli were instead formed from stratified epithelium, what would result?
Gas exchange would not occur or would be severely limited. Stratified epithelium is composed of many layers of cells, and is more impenetrable than simple epithelium. O2 and CO2 would need to diffuse through several cell layers to move in and out, and would be unable to do so efficiently.
Blood, cartilage, and bone are part of which basic tissue type?
These cell types are examples of connective tissue. Connective tissue usually fulfills a structural role and is surrounded by an extracellular matrix. Other examples include cartilage, ligaments, fibroblasts, and lymph.
Name the largest organ in the integumentary system.
Skin. The skin is the largest organ not only in the integumentary system, but in the entire human body.
What are three main functions of the skin?
Physical protection of internal organs. Regulation of body temperature. Prevention of water loss.
What is the difference between sebaceous glands and sweat glands?
Sebaceous glands secrete oil, or sebum, to prevent the skin from drying out. These glands are often found near the base of hair follicles. Sweat glands secrete sweat, a fluid that contains water and electrolytes. The evaporation of sweat serves to decrease body temperature.

Which layer of the skin lies between the epidermis and the subcutaneous layer?

Dermis. The dermis is also the thickest layer, and contains connective tissue, hair follicles, and glands.

A tissue sample taken from the skin contains adipose tissue and collagen, but lacks sebaceous glands. From which layer did this sample most likely originate?
It most likely originated from the subcutaneous layer, sometimes called the hypodermis. The hypodermis is the deepest layer of the skin and is formed mainly from adipose (fat) cells.
In the skin, what is the role of keratin?
A protective protein that forms a watertight layer in the epidermis. Most epidermal cells are keratinocytes, meaning that they do or did produce keratin. Only the innermost cells of the epidermis are alive.
In the skin, what is the role of melanin?
Protects the skin from the harmful effects of UV radiation. As a pigment, it also provides skin color.
Name two ways in which the skin is involved in thermoregulation.
In cold conditions, insulation is provided by a layer of fat cells in the subcutaneous layer, or hypodermis. In hot conditions, secretions from sweat glands can lower body temperature.

Define: piloerection

This involves the raising of hairs on the skin in response to cold or fear. The hair forms an insulating layer, assisting in thermoregulation. The common name for piloerection is simply 'goosebumps.'

When temperatures are cold, blood vessels near the skin change in diameter. What is the term for this change, and what does it accomplish?
In the cold, vessels close to the skin undergo vasoconstriction, or a decrease in diameter. This reduces flow and keeps blood away from the cold exterior environment, where heat can easily be lost. The opposite process, vasodilation, occurs in hot temperatures. Vessels near the skin widen, allowing more blood near the surface of the body so heat can more readily dissipate.