Tisues

Question 1

Gap Junction

Answer 1

• Cell junctions that allow the passage of ions and small molecules
• Cells are connected through connexons
• The passage of ions is to create a charge, so these junctions are usually found in the heart and nervous tissue which are powered by electrical impulses

Question 2

Tight Junction

Answer 2

• Cell junctions that do not allow the passage of any substances
• These cells are connected by junctional proteins
• mostly found in the intestine and blood-brain barrier

Question 3

Desmosomes

Answer 3

• Structural junction that can withstand stress
• Looks kind of like velcro
• Found in the skin, uterus, and heart

Question 4

4 tissue types

Answer 4

• Epithelial
• Connective
• Nervous
• Muscle

Question 5

Epithelial Tissue

Answer 5

• Lines the body, at least one side is always facing toward some kind of cavity/free space
• Contains exocrine and endocrine glands
• Functions: Protection, absorption/secretion, filtration, diffusion/ion transport
• Simple, stratified, pseudostratified
• Squamous, cuboidal, columnar

Question 6

Simple, Stratified, Pseudostratified

Answer 6

• Simple - A single layer of cells, good for diffusion and filtration. Found in areas with little wear and tear.
• Stratified - Many layers of cells on top of one another. Defends against microbes and protects areas that face wear and tear Usually only squamous cells
• Pseudostratified - Columnar cells arranged so that the nuclei do not line up, creating a stratified appearance

Question 7

Types of Glands

Answer 7

• Exocrine secretes substances into ducts
• Endocrine secretes substances directly into the blood
• Paracrine glands secrete over short distances, such as between cells

Question 8

Goblet Cells

Answer 8

• produce mucin to lubricate body surfaces

Question 9

5 Classes of Connective Tissue

Answer 9

• Connective Tissue Proper
• Cartilage
• Bone
• Blood
• Fat

Question 10

Connective Tissue Proper

Answer 10

• Loose
• Dense

Question 11

Loose Areolar CT

Answer 11

• Gel like matrix
• Fibers running in all directions
• Underlies epithelial tissue, Surrounds blood vessels and organs

Question 12

Adipose CT

Answer 12

-large cells that contain mostly fat

Question 13

Dense Irregular CT

Answer 13

• Irregularly arranged collagen and elastin fibers
• Withstands tension and pulling
• Largely found in the skin, gut, and fibrous capsules of joints and organs

Question 14

Dense Regular CT

Answer 14

• Parallel collagen fibers
• Poorly vascularized
• Meant to withstand pulling in one direction

Question 15

Types of Muscle

Answer 15

• Skeletal
• Cardiac
• Smooth

Question 16

Types of Cell Repair

Answer 16

• Regeneration: Replacing damaged cells or cut sites with the same type of cell
• Fibrosis: Proliferation of scar tissue
• Organization: formation of granulation tissue (new connective tissue with microscopic blood vessels that forms during wound healing)