Lecture 3 & 4: Tissue

Question 1

tissue

Answer 1

group of cells that work together to perform a specific function

Question 2

types of tissue (4)

Answer 2

• epithelium = covers surface of the body and lines interior of organs and body cavities
• connective tissue = binds structures to one another and covers and protects organs
• muscle = facilitates movement of bony skeleton
• nervous tissue = nerve cells provide stimulus that controls body activities and glial cells support and protect neurons

Question 3

epithelial tissue (4)

Answer 3

• cells held closely together by cellular adhesions resting on a basement membrane
• highly cellular [very little intercellular material]
• avascular
• gets oxygen by diffusion from underlying tissue

Question 4

simple squamous (3)

Answer 4

• 1 thin layer of cells used for exchange [diffusion - filtration]
• blood vessel wall
• alveoli of lung

Question 5

simple cuboidal (2)

Answer 5

• one layer of cube shaped cells

- glands

Question 6

simple columnar (6)

Answer 6

• single layer of tall rectangular cells
• ideal for production of substances due to many organelles
• exchange across cells and absorption
• digestive tract
• stomach
• intestine

Question 7

stratified squamous (6)

Answer 7

• many layers of thin cells
• protective
• beginning and end of GI tract
• vagina
• esophagus
• skin

Question 8

stratified cuboidal

Answer 8

glands [ex. sweat, salivary, mammary]

Question 9

stratified columnar

Answer 9

larynx

Question 10

pseudostratified ciliated columnar [respritory epithelium] (4)

Answer 10

• appearance of stratification but not
• nasal cavity
• trachea
• bronchi

Question 11

transitional (2)

Answer 11

• organs that need to expand/ dialate [ex. bladder, uterus, ureters]
• cells appear to change shape as they are stretched

Question 12

endocrine glands (2)

Answer 12

• produces hormones

- secretes products through the bloodstream to act on a specific gland/ organ [ex. thyroid gland]

Question 13

exocrine glands (2)

Answer 13

• produces a variety of substances

- secrete product through a duct to a specific location

Question 14

unicellular exocrine glands

Answer 14

produce mucous [glycoprotein/ viscous/ dissolved in H2O] [ex. goblet cell]

Question 15

multicellular exocrine glands (3)

Answer 15

• simple tubular
• simple alveolar
• compound tubular of alveolar
  [ex. salivary glands]

Question 16

types of secretions (3)

Answer 16

• serous = watery fluid
• mucous = thick viscous fluid
• mixed = combo of both