Lab 3

Question 1

Histology

Answer 1

The study of tissues/microscopic anatomy.

Question 2

Simple squamous epithelium (L: 3, F: 3)

Answer 2

Locations: air sacs of lungs, heart and lining of blood vessels (endothelium), and the surface layer of many membranes (mesothelium)

Functions: provides a smooth lining, filters, allows diffusion

Question 3

Simple cuboidal epithelium (L: 3, F: 2)

Answer 3

Locations: major glands/glandular organs, kidney tubules, liver, sweat ducts

Functions: secretion of fluids, reabsorption

Question 4

Simple columnar epithelium (L: 2, F: 1)

Answer 4

Locations: (nonciliated) Inner portions of digestive tract, (ciliated) uterine tubes

Functions: provides absorptive area

Question 5

Pseudostratified ciliated columnar epithelium (L: 1, F: 1)

Answer 5

Locations: Lines respiratory passages

Functions: Traps/moves dust particles in mucus

Question 6

Stratified squamous epithelium (L: 3, F: 1)

Answer 6

Locations: outermost skin layer, vaginal canal, mouth

Functions: protect from abrasion

Question 7

Transitional epithelium (urothelium) (L: 2, F: 1)

Answer 7

Locations: Ureter and bladder

Functions: Expands to fill with urine

Question 8

Name of cardiac muscle cells

Answer 8

Myocytes. Cardiac muscle cells are branched.

Question 9

Function of intercalated discs

Answer 9

Facilitate the transmission of the electrical impulses of the heart.

Have GAP JUNCTIONS so the cells can communicate.

Question 10

Smooth muscle (L: 3, F: 3)

Answer 10

Locations: digestive tract, blood vessels, uterus

Functions: sustained contractions, propulsion of food/delivery of infant.

Question 11

Locations of nervous tissue (4)

Answer 11

1. Brain
2. Spinal cord
3. Ganglia
4. Peripheral nerves

Question 12

What do all connective tissues arise from?

Answer 12

Embryonic tissue called mesenchyme

Question 13

Dense regular connective tissue (L: 2)

Answer 13

Locations: tendons, ligaments

Question 14

Dense irregular connective tissue (L: 2)

Answer 14

Locations: deep layers of skin, white of the eye

Question 15

Elastic connective tissue (L: 1)

Answer 15

Collagenous and elastic fibers.

Locations: walls of arteries

Question 16

Reticular connective tissue (L: 4, F: 1)

Answer 16

Locations: Lymph nodes, spleen, thymus, liver

Functions: provides supportive framework of organs

Question 17

Areolar connective tissue (L: 3, F: 2)

Answer 17

Locations: Wrap around organs, between muscles, underlies epithelium

Functions: binds epithelia to lower layers, insulates organs

Question 18

Adipose tissue (F: 2)

Answer 18

Highly cellular, store lipids

Functions: energy storage, protection

Question 19

Chondroitin sulfate

Answer 19

In matrix of cartilage; forms semisolid gel in which cells and fibers are found

Question 20

Perichondrium (L: 1)

Answer 20

Dense irregular connective tissue

Location: thin layer in surface of cartilage

Question 21

Hyaline cartilage (L: 5, F: 2)

Answer 21

Collagenous fibers

Locations: ends of long bones, ribs, larynx, trachea, respiratory passages

Functions: reduces joint friction, hold open airways.

Question 22

Fibrocartilage (L: 2, F: 2)

Answer 22

More collagenous fibers than hyaline. Chondrocytes frequently found in rows.

Locations: pubis symphysis, menisci, intervertebral discs

Functions: Absorbs shock, prevents mechanical damage

Question 23

Elastic cartilage (L: 2, F: 1)

Answer 23

Locations: external ear, epiglottis

Functions: provides flexible framework

Question 24

Bone

Answer 24

Extracellular matrix made of hydroxyapatite crystal (calcium salt).

Contains collagenous fibers, osteocytes