Histology

Question 1

what is 200,000um in mm

Answer 1

200mm

Question 2

where is the nucleus located in a skeletal muscle cell?

Answer 2

on the edge

Question 3

where is the nucleus located in cardiac muscle cells?

Answer 3

middle

Question 4

what comprises muscle tissue?

Answer 4

muscle cells

connective tissue

Question 5

what is the cell membrane called in muscles?

Answer 5

sarcolemma

Question 6

what is a group of muscle fibres called?

Answer 6

fascicle

Question 7

what is the connective tissue that surrounds the muscle as a whole called?

Answer 7

epimysium

Question 8

what is the connective tissue that surrounds a single fascicle called?

Answer 8

perimysium

Question 9

what is the connective tissue surrounding a single muscle fibre called?

Answer 9

endomysium

Question 10

name the constituents of muscle from the smallest component to the largest

Answer 10

sarcomere
myofibril (lots of sarcomeres)
muscle fibre
fascicle
muscle

Question 11

what makes up the striations of skeletal muscle fibres

Answer 11

consecutive z lines of sarcomeres

Question 12

how are bones nourished?

Answer 12

via blood vessels pervading the tissue

Question 13

how is cartilage nourished

Answer 13

diffusion through ECM

Question 14

what is the space called that chondrocytes live in

Answer 14

lacuna

Question 15

3 types of cartilage

Answer 15

hyaline
elastic
fibrocartilage

Question 16

example of elastic cartilage

Answer 16

ear

Question 17

where would you find hyaline cartilage

Answer 17

articular surfaces
tracheal rings
costal cartilage
epiphyseal growth plates

Question 18

what type of bone makes up the epiphysis

Answer 18

trabecular bone

Question 19

what type of bone makes up the shaft (diaphysis)

Answer 19

cortical bone

Question 20

main difference between compact and trabecular bone

Answer 20

trabecular has marrow cavities (spaces) adjacent to it, also lacks haversion canals

Question 21

name the living cells in bone

Answer 21

osteocytes

Question 22

where do osteocytes live

Answer 22

lacunae

Question 23

name the structure that encompasses lamellar bone layers and a haversion canal

Answer 23

osteon

Question 24

what are volkmann’s canals?

Answer 24

any blood vessels that deliver blood to the bone

Question 25

what is an osteon surrounded by?

Answer 25

cement lines

Question 26

what are osteoprogenitor cells and where do they live?

Answer 26

serve as a pool of reserve osteoblasts, located on bone surfaces

Question 27

what are osteoblasts?

Answer 27

bone forming cells

Question 28

what organelles are particularly plentiful in osteoblasts

Answer 28

mitochondria | RER

Question 29

what are osteocytes

Answer 29

bone cell trapped within bone matrix

Question 30

what are osteoclasts

Answer 30

large multinucleated cells involved in bone resorption aka drilling

Question 31

what type of cell creates the tunnel in bone to make room for blood vessels

Answer 31

osteoclasts

Question 32

what type of cell lines the tunnel and makes new bone around the vessel

Answer 32

osteoblasts

Question 33

what is a basic multicellular unit?

Answer 33

collection of osteoclasts and osteoblasts that participate in bone remodelling

Question 34

what is osteoid?

Answer 34

secreted collagen, GAGs, proteoglycans and organics from osteoblasts

Question 35

what is the name of the bone laid down during development/breakage?

Answer 35

woven bone