The correct answer is: tighten and contract
This is is the correct
answer because muscle fibers need to first reach an optimal length and
tension ratio or "tighten" in order for the muscle to perform work.
After the muscle has tightened, it can then "contract" which leads to a
decrease in the angle of the joint through force. If the muscle being
used to pull the rope is the bicep on the arm, then the angle between
the forearm and upper arm will decrease, causing the rope to be pulled.
FITNESS PERFORMANCE IS HOW HIGH YOUR ENDURANCE IS AND HOW LONG YOU CAN STAY ACTIVE HOW LOW YOUR HEART RATE STAYS WHILE YOU MOVE ECT....
Pulmonic stenosis is a dynamic or fixed obstruction of flow from the right ventricle of the heart to the pulmonary artery.
The nurse would most likely say that it is a fixed or dynamic obstruction which means that your child's heart is not getting good blood flow through it artery to the heart.
They would advise to not eat hearty foods and go for walks and stuff, this is right trust me it happened to my mom