Muscoskeletal System

Question 1

Planar joints

Answer 1

Articulating surface are flat

Bones glide back and forth or side to side

Question 2

Hinge joints

Answer 2

Convex surface of 1 bone fits into concave surface of another

Angular motion occurs

Question 3

Pivot joints

Answer 3

Pointed surface of 1 bone fits into the ring surface of another bone

Rotational movement

Question 4

Condyloid joints

Answer 4

1 oval projection fits into 1 oval cavity of a bone

Angular motion on an axis

Question 5

Saddle joint

Answer 5

1 bone fits into the other saddle shaped bone

Question 6

Ball+ socket

Answer 6

Bone surface on 1 bone fits into cupped like depression

Question 7

Knee joints

Answer 7

Contains articulate capsule

Question 8

Skeletal muscle tissues

Answer 8

Striated and voluntary attached to the bone

Question 9

Cardiac tissues

Answer 9

Forms most of the heart wall and is involuntary and striated

Question 10

Role of intercalated discs

Answer 10

Allow muscle potentials to quickly spread

Question 11

Smooth muscle tissues

Answer 11

Intermediate filaments and are involuntary and non striated

Question 12

Functions of smooth muscles

Answer 12

Produce body movements

Regulate organ volume

Movement of substance around the body

Stabilises body position

Question 13

First stage of of contraction

Answer 13

Muscle action potential is delivered by motor neuron

Question 14

Neuromuscular junction

Answer 14

Reaches the synapse between the motor neuron and muscle diver

Question 15

Excitation of motor neuron

Answer 15

Releases Acetycholine from synaptic vesicles that diffuse across synapse and binds to ACh receptors

Question 16

Break down of ACh to enzyme

Answer 16

Inflow of NA ions down concentration gradient

Question 17

Sliding filament mechanism

Answer 17

Shortening of sarcomeres causes shorting of muscle fibers

Question 18

ATP contraction

Answer 18

1. ATP splits because of myosin and becomes energised
2. Myosin head attaches to actin forming a cross bridge
3. Cross bridge generates force at it moves towards center of sarcomere
4. Myosin detached from actin and ATP splits agin and returns to original position to bind to a new site in the a fib to continue the contraction cycle

Question 19

Agonist muscles

Answer 19

Produces desired action

Question 20

Antagonist

Answer 20

Opposite action

Question 21

Synergist

Answer 21

Removes unnecessary movement/ reduces them

Question 22

Fixator

Answer 22

Stabilises origin for more efficient move

Question 23

Origin

Answer 23

Attachment to stable bone origin form scapula