provide internal
core structure for the attachment of muscles.
Protection of human organs
Keeps body shape
2) joints - place in your
body Where two bones are connected
Three types of joints in your body:
I) fibrous joints
join bones where
no movement is allowed
An example will be the bones of your cranium (the skull).
Ii) cartilaginous joints
allows slight, restricted movement
for example the discs between the vertebrae of the spine
Iii) synovial joints
Allow
free movement in one or more directions to the joints of the pelvic and pectoral girdles.
These joints facilitate movements like standing, sitting, walking and running.
Ii) cartilaginous joints
allows slight, restricted movement
for example the discs between the vertebrae of the spine
Iii) synovial joints
Allow
free movement in one or more directions to the joints of the pelvic and pectoral girdles.
These joints facilitate movements like standing, sitting, walking and running.
Iii) synovial joints
Allow
free movement in one or more directions to the joints of the pelvic and pectoral girdles.
These joints facilitate movements like standing, sitting, walking and running.
3) ligaments – connect bone and bone.
Hold bone in place so that they work in a coordinated manner.
4) tendons - connect muscles to bone.
Attachment to the skeletal muscles move your bones
Facilitate the various positions of the body related to movement and balance.
5) antagonistic muscles
Antagonistic = ‘opposite’
Antagonistic movement of muscles
at least
two sets of muscles
one set
contracts and the other
relaxes
Contraction = stimulated muscle – becomes shorter and thicker
Relaxation = muscle relaxes
Example: biceps and triceps
The
biceps is an example of a
flexor muscle (muscle whose contraction shortens a body part)
Whereas the
triceps is an example of an
extensor muscle (muscle whose contraction extends or stretches a body part).
Note that voluntary muscles are normally connected to at least two bones.
In the case of the biceps the two bones involved are the
scapula and the
humerus
When the biceps muscle contracts only one of the bones moves ( in this case the
radius). The point of attachment to the movable bone is called the
point of insertion and the biceps is attached to this point by a single tendon. So when the biceps
contracts the forearm is lifted or bent, decreasing the angle between the forearm and humerus. and flexing your arm, Thus the biceps is a
flexor muscle
The biceps muscle gets its name from having two tendons attached to the scapula.
The resistance. of these two tendons prevents the contractile force of thebiceps from moving the scapula and therefore
there is no movement of the bone..
The point of attachment of a muscle to the immovable bone is called the
point of origin.
When the arm is bent the biceps cannot contract as it is already in a contracted
state as muscles can only cause movement by
pulling as they contract not by pushing when they relax.
Therefore the straightening of the arm is brought about by the contraction of
the
triceps muscle which is an
extensor muscle as it increases the angle between forearm and humerus
The triceps has three points of origin, two on the humerus and one on the
scapula, and a single point of insertion on the ulna.
Title
Video illustrating the mechanics of the antagonism within the biceps and
triceps.
A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
