Intro to Tissue types

Question 1

4 types

Answer 1

epithelial, connective, muscle, nerve

Question 2

Epithelial

Answer 2

Always in contact with the outside. Tight. Polarized (ie unidirectional diffusion). Named based on uppermost cells

Question 3

Pseudostratified columnar

Answer 3

Trachea. Looks stratified, but really a single cell layer (all touch basement membrane). Nuclei all over the place.

Question 4

Transitional

Answer 4

Ureters or bladder. Stretch

Question 5

Skin vs mucosa

Answer 5

Mucosa are all alive, so they have nuclei. Skin are dead keratinized cells

Question 6

Connective

Answer 6

Embedded in ECM. Structural and metabolic support. Connect tissues to other tissues and to organs. Wound repair. Has immune cells (resident and transient)

Question 7

Connective types

Answer 7

Loose (areolar, adipose, reticular); Dense (regular irregular elastic). Cartilage, bone, lymph, blood.

Question 8

Loose connective

Answer 8

Fibroblasts, mesenchymal cells, adipocytes. Elastin.

Question 9

Dense

Answer 9

Regular: ligament, tendon. Irregular: characterize by collagen arrangment

Question 10

Nervous

Answer 10

Large cells, elongated. Conduct impulses. Can’t see all the dendrites usually.

Question 11

Nerve fibers

Answer 11

Longitudinal: nuclei along them are schwann cells. Cross section: again, nuclei are schwann, white space is myelin