Functions
How many main functions are there?
5
where are the cardiac muscles found
Heart
during flexion at the knee what muscle is responsible for the movement?
Hamstring
what are the 2 types of muscle fibres?
Slow twitch and fast twitch.
motor neuron + muscle fibers stimulated = ???
Motor unit
what muscle is at the front of your shin?
Tibialis anterior
is smooth voluntary or involuntary
involuntary
is agonist or antagonist when a muscle contracts?
agonist
are slow twitch muscle fibres fatigue resistant?
Yes
what is the role of a motor neuron
send messgaes from the brain to the muscles
Name 3 main functions of the muscular system:
- body movement
- energy production
- posture
- produce heat
- essential bodily functions
skeletal muscle function
attaches to and causes movement of the skeleton
During body movement which muscle contracts and which one relaxes during a bicep curl
Bicep = Contracts
Tricep = Relaxes
which fiber has the most oxygen
Slow twitch muscle fibers
For a strength of muscular of contractions to occur there must be __________________ to stimulate the muscle fibers
Strong enough nerve impulse (message from the brain)
using correct terminology how does the muscular system produce heat
Small muscle contractions produce heat to resynthesis ATP
Why is the skeletal muscle voluntary
because you are consciously aware of your muscles and can control their contractions
Name an antagonist pair in the knee?
Hamstring and quadriceps
which energy system uses fast twitch muscle fibers?
- ATP PC system
- Anaerobic Glycolysis System
What are the two ways the intensity of muscular contractions can vary
1. Varying the number of motor units simulated
2. Varying the frequency of the nerve impulses
what are the 2 types of muscles in essential bodily functions?
- voluntary muscles
- involuntary muscles
explain in detail the function of the smooth muscle?
Contractions of the smooth muscle in the intestinal walls and stomach. Such as food moving through the digestive tract.
In a golf swing what are the movements produced and the antagonist pair?
Movements produced = adduction, abduction
antagonist pair = latissimus dorsi, deltoid
How does having a large number of mitochondria assist a long distance runner?
they are able to resysnthesis larger amounts of ATP aerobically
define the all or nothing principle
a nerve impulse will not stimulate the muscle fibers untill it reaches a certain threshold.