skeletal muscle and movement

Question 1

three types of muscle tissue

Answer 1

smooth, cardiac, skeletal

Question 2

5 key features of skeletal muscle

Answer 2

excitability
conductivity
contractability
elasticity
extensibility

Question 3

names for muscle connections (skeletal muscle)

Answer 3

origin - attachment to stationary bone
insertion - attachment to moveable bone

Question 4

what is muscle surrounded by

Answer 4

epimysium

Question 5

how is a muscle organised

Answer 5

arrangement of tissue in fascicles surrounded by perimysium

Question 6

what are fascicles composed of

Answer 6

muscle fibres/myocytes surrounded by endomysium

Question 7

what do muscle fibres contain and what do these do

Answer 7

myofibrils - contractile units

Question 8

what are sarcomeres

Answer 8

repeating protein pattern in myofibrils composed of actin and myosin

Question 9

actin and myosin - which is thin, which is thick?

Answer 9

actin is thin proteins
myosin is thick proteins

Question 10

M line?

Answer 10

middle of sarcomere

Question 11

Z line?

Answer 11

actin anchor between sarcomeres

Question 12

I band?

Answer 12

actin only

Question 13

H band?

Answer 13

myosin only

Question 14

A band

Answer 14

actin/myosin overlay

Question 15

tendons and ligaments properties

Answer 15

tendons - tough, inelastic
ligaments - flexible, highly elastic

Question 16

mineral and organic components of bone?

Answer 16

mineral - hydroxyapatite
organic - collagen type 1

Question 17

two types of bone?

Answer 17

cortical and cancellous

Question 18

what is the circular system in cortical bone called? features?

Answer 18

osteon. haversian canal in centre. concentric lamellae. osteocytes.

Question 19

name for branches in cancellous bone

Answer 19

trabeculae

Question 20

two types of bone development

Answer 20

intramembranous and endochondral