Muscular system Flashcards
What is vasoconstriction?
Vasoconstriction is when arterioles feeding the areas not needing so much blood become smaller, restricting blood flow to those tissues that are not needed during exercise.
This process helps prioritize blood supply to vital organs during physical activity.
What is vasodilation?
Vasodilation is when arterioles feeding the areas needing more blood (muscles, skin, heart) become wider, increasing blood flow to those tissues needed during exercise.
This mechanism ensures that active tissues receive adequate oxygen and nutrients during physical exertion.
Fill in the blank: Vasoconstriction restricts blood flow to tissues that are not needed during _______.
exercise
Fill in the blank: Vasodilation increases blood flow to _______ areas during exercise.
needed
True or False: Vasoconstriction increases blood supply to all areas of the body during exercise.
False
True or False: Vasodilation occurs in muscles, skin, and heart during exercise.
True
What do muscles require for energy?
Muscles require energy from fuels like carbohydrates and fats.
What is released as a by-product when fuels are broken down?
Heat is released as the by-product.
What happens to energy needs when you exercise more?
The more you exercise, the more energy is needed.
What is the effect of increased exercise on heat production in muscles?
The more exercise, the more heat your muscles will produce.
What principle is demonstrated by the relationship between exercise and heat production?
This is the principle of a warmup.
What effect does increasing temperature have on pliability?
We can increase pliability through increasing temperature
What benefit does increased pliability provide?
It enables us to become more flexible
What is the relationship between pliable muscles and strains?
Pliable muscles are less likely to suffer strains
How do pliable muscles affect movement at joints?
Pliable muscles will increase ranges of movement at joints
What builds up in the working muscles during high intensity exercise?
Lactate
Lactate is a waste product during anaerobic exercise.
What is the effect of lactate build up on muscle fatigue?
It results in rapid fatigue.
How does lactate affect muscle contractions?
It impedes (prevents) muscle contractions.
What happens to lactate levels as work rate increases?
Lactate levels increase.
During which type of exercise does lactate build up occur?
Anaerobic exercise.
What happens to muscles during resistance training?
Stress is placed on muscles, resulting in micro tears in the muscle fibre
What is the result of micro tears in muscle fibres?
Swelling in the muscle, which puts pressure on nerve endings, resulting in pain
When do training improvements occur?
During rest, allowing for the repair of micro tears
What happens to muscles after micro tears repair?
Muscles become a little stronger
