Lab 6 Flashcards
What do Skeletal muscle cells do?
They Generate force
Which gets applied to bone
To creates movement
what Coordinates which muscles are used for a given moment
Central nervous system
What does a Somatic motor neuron do?
Delivers message by releasing acetylcholine to muscle cells that need to be activated
What are skeletal Muscle cells in a FB Loop?
Are effectors
What is Actin and myosin
Contractile proteins
more bonds more force
These contractile proteins are arranged within repeating patterns
they are Arranged end to end along the length of a cell with myofibrils
Sarcomeres
Bundles of contractile and elastic proteins responsible for muscle contraction
Myofibril
What is a Sarcoplasmic reticulum?
Membranous organelle that contains large quantities of calcium ions
Myofibrils are surrounded by Sarcoplasmic reticulum.
Muscle cell/fiber
Made up of many myofibrils
The membrane of a muscle cell
it has extensions that run deep
called transverse tubules
Sarcolemma
Electromyography
The recording of electrical activity of muscle tissue. Records the voltage that was produced
When a skeletal muscle contracts continuously or repetitively. The muscle cannot continue working at the current level.
Muscle fatigue
Motor unit
A motor unit is a motor neuron along with all the skeletal muscle fibers that it stimulates to contract.
The difference in the electrical charge inside the cell when the Cell is at rest -70
Resting membrane potential
If channels open for sodium in the cell membrane sodium moves through by the specific process
simple diffusion
Which step in a feedback loop is responsible for communicating with that effector?
Efferent pathway
The specific communication pathway used to communicate with skeletal muscle cells
Somatic motor neurons
Neurons that communicate with other cells by secreting a signal molecules are called _______ into the synaptic cleft?
Nerotransmitter
The specific signal molecule sent to skeletal muscle cells is named?
Acetylcholine
Receptor found on the membranes of the skeletal muscle
Nicotinic receptors
what is a Motor unit?
One somatic motor neuron plus all the muscle fiber cells that innervates them
Where is the exact site of tension development in muscle is?
The bond between proteins actin and myosin
Proteins synthesis up regulation (in Muscles)
More contractile proteins are produced and added to myofibrils
Steroid hormone serve as transcription factors to initiate the steps involved in proteins synthesis
Hypertrophy
The enlargement of muscles
