stuff
Describe the 3 types of muscle
Skeletal- multi nucleated, striations, voluntary
Cardiac- one nuclei, striations, involuntary
Smooth- one nuclei, no striations, in voluntary
what is the epimysium?
connective tissue covering surrounding the whole muscle
Where is Ca++ stored
SR
What happens to a muscle contraction if there is no Calcium?
No contraction!!
What makes up the CNS
brain and spinal cord
What is the perimysium?
connective tissue covering around a fasiacle.
What 3 steps of a muscle contraction require ATP?
Powerstroke, Breaking of cross bridge, and the return of Ca++ to the SR
What is a motor unit?
One motor neuron and all the muscle cells it innervates.
what goes under the somatic part of the Nervous system chart
skeletal muscle
What are Sarcolemma vs. Sarcoplasm?
Sarcolemma- cell plasma membrane
Sarcoplasm- cytoplasm
Endurance training results in a shift of muscle fibers from type __ to type __.
type 2x to type 2a
what is a body part that has a low innervation ratio? What does that mean?
low innervation is for fine motor control, like a hand.
What is the neurotransmitter in a muscle contraction
Acetylcholine
What is actin attached to?
z line
Disuse leads to a muscle fiber switch from __ to __
type 2a to type 2x
__ is the thick filament in a sarcomere
Myosin
What are the steps of a muscle contraction
1-13
What are the 3 skeletal muscle fiber types and name 3 different characteristics for each?
Type 1, type 2a, type 2x
What does it mean for a muscle to be plastic?
It can change! How?
What is a sarcomere? What does a bunch of them together make?
its zline to zline. It makes a myofibril.