Motor System

Question 1

motor system functions

Answer 1

support, protection, movement

Question 2

hydrostatic

Answer 2

fluid held under pressure in a closed compartment
nematoads, annelids
movement by changing shape of fluid filled compartments with muscle/contractive cells

Question 3

types

Answer 3

hydrostatic

endoskeleton

Question 4

exoskeleton

Answer 4

hard covering of the body surface including shells or cuticles that attach to underlying muscles

Question 5

endoskeletons

Answer 5

hard supporting structures (bones) encased in teh soft tissues of an animal

Question 6

contraction

Answer 6

shortens the muscle, placing force on the tendons pulling the more movable bone inward

Question 7

insertion

Answer 7

more moveable bone

Question 8

origin

Answer 8

less moveable bone

Question 9

i bands

Answer 9

thin filaments of actin

Question 10

a bands

Answer 10

thick myosin filaments overlapping with actin

Question 11

h zone

Answer 11

thick myosin filaments only

Question 12

z line

Answer 12

made of proteins that attach to actin, defines the basic unit of contraction, the sarcomere

Question 13

m line

Answer 13

attachment site for thick filaments

Question 14

tropomiosin

Answer 14

in resting state it blocks interaction between actin and myosin

Question 15

triponin

Answer 15

removes block of tropomiosin. with binding calcium and pulls tropomiosin off

Question 16

what is contraction of the whole muscle determined by

Answer 16

number of muscle fibers contracting and the rate of contraction

Question 17

recruitment

Answer 17

tension generated gets greater the more fivers are stimulated
stronger input activates more “motor units”

Question 18

tetanus

Answer 18

if contractions become sustained without any relaxation

Question 19

Asynchronous recruitment

Answer 19

maintain tetanic contractions in muscle.

some contract and others relax in order to prevent fatigue

Question 20

muscle tone

Answer 20

set of muscle are kept patricianly contracted for extended amounts of time