Muscles Flashcards
What type of muscle is responsible for bodily movement?
Skeletal muscles
What is the function of the antagonist muscle?
It lengthens
What is the function of the agonist muscle?
contracts
What is the origin of a muscle?
the immovable end of the joint, and the point where the muscle attaches to the more stationery bone
What type of muscle fibre is required for endurance activities?
Slow twitch (type 1)
What is the main source of ATP during endurance activities?
cellular respiration
what is the function of the sarcoplasmic reticulum?
It transports electrochemical substances involved in muscle activation
Which part of the heart acts as the pacemaker?
Sinoatrial node (SA node)
What is the formula for calculating cardiac output?
Heart Rate x Stroke Volume
What is the function of the respiratory system?
To supply oxygen to the blood, To remove carbon dioxide from the blood, To regulate blood pH
What is the function of the respiratory system?
To supply oxygen to the blood, To remove carbon dioxide from the blood, To regulate blood pH
What is VO2max?
The maximum amount of oxygen that the body can consumed
What factors contribute to a higher V02max?
Heredity and training, Age and sex, Body composition and tung capacity
What is the purpose of breathing heavily during exercise?
To take in more oxygen,
To exhale more carbon dioxide, to regulate blood PH
Which type of muscle contraction causes the angle between joints to decrease?
Concentric
What is the main function of carbohydrates in the body?
To provide energy for cells, To build cell membranes, To store glucose in the muscles
What is the role of ATP in muscle contraction?
It provides energy for muscle contraction
What is the purpose of the pericardium?
To protect the heart
What is the function of arterioles in the cardiovascular system?
To regulate blood pressure and flow
What is the sliding filament theory?
actin filaments moving closer together and sarcomere shortening
What is the purpose of the AV node in the heart?
To delay ventricular contraction and allow atria to complete contraction
What is the purpose of the ECG in measuring heart activity?
To provide a graphical representation of the electrical sequence of heart contraction
Which type of muscle tissue is responsible for involuntary movements, such as contraction of the stomach and intestines?
Smooth muscles
What is the insertion of a muscle?
The movable end of the joint, The point where the muscle attaches to the bone that is moved most
Which type of muscle fiber is responsible for explosive, powerful movements?
Type 2b (Fast Glycolytic)
What is the main source of ATP during high-intensity, short-duration activities?
ATP-PC system
Which part of the heart receives oxygenated blood from the lungs?
Left atrium
What is the function of the alveols in the respiratory system?
To regulate blood pH, To enable-gas exchange between air and blood
What protein puts out the crossbridges to help contraction happen?
Myosin
What is the role of fats in the body during long distance exercise?
To provide energy for cells
What is the purpose of the mitral/bicupsid valve in the heart?
To prevent backflow of blood from the left ventricle to the left atrium
What is the difference between aerobic and anaerobic exercise?
Aerobic exercise requires oxygen, while anaerobic exercise does not
What is the purpose of the SA node in the heart?
To initiate the electrical signals for heart contraction
Which type of muscle fiber is responsible for explosive, powerful movements?
Type 2b (Fast Glycolytic)
What is the main source of ATP during high-intensity, short-duration (0-15 sec) activities?
ATP-PC system
Which part of the heart receives
oxygenated blood from the lungs?
Left atrium
What metabolic pathway has lactic acid as a byproduct during ATP resynthesis?
Glycolysis
What is a sarcomere?
the contractile unit in a muscle fibre
