Muscle And Skeletal System

Front 1

Muscle function

Back 1

* stabilize joint
*moves skeleton (support and mobility).
*heat production (thermoregulation)
*circulatory assistance.

Front 2

Smooth muscle

Back 2

*involuntary
*esophagus and digestive tract.
*walls of hollow organs
* non straited, shaped like an almond, one nucleus and tapered.

Front 3

Cardiac muscle

Back 3

*involuntary
* striated,branched, one nucleus
*the heart

Front 4

Skeletal muscles

Back 4

*voluntary
*striated, multinucleated
*muscles around skeletal system.

Front 5

Striated vs non striated

Back 5

*striated: has sacromeres (A and I bands)
* Non striated like smooth muscles has no sacromeres but still contain myosin and actin.

Front 6

Motor neurons

Back 6

*signals muscles and organs to do stuff.
*somatic and automatic motor neurons

Front 7

somatic motor neuron

Back 7

*controls skeletal muscles

Front 8

automatic motor neurons

Back 8

*controls involuntary (smooth and cardiac) muscles

Front 9

How does muscle contraction work?

Back 9

*Action potential reaches the axon terminal.
*Release neurotransmitters unto the synapses
*the receptors on the base plate of the muscle (sacomere) picks up the signal
*when threshold is reached the action potential moves along the sarcomeres and contracts the muscle.

Front 10

Sympathetic and parasympathetic

Back 10

* Sympathetic: fight or flight.
*heart beats fast
* pupils dilate
*blood pressure goes up
*blood goes to muscles and not to digestive tracts
Parasympathetic: resting.
*heart rate goes down
*pupils constrict
*blood pressures goes down and blood goes to digestive tracts.