20 Questions
Which gas constitutes the highest percentage in the alveolar air?
Nitrogen
What is the main function of hemoglobin in the blood?
To carry oxygen
What is the main source of energy for muscle contraction?
ATP
Which theory explains Delayed Onset Muscle Soreness (DOMS) as a result of microscopic damage to muscle fibers?
The torn tissue theory
What is the functional unit of a skeletal muscle fiber?
Sarcomere
Which nervous system division is responsible for 'rest and digest' functions?
The parasympathetic nervous system
What is the primary function of sensory or afferent neurons?
To transmit signals from sensory receptors to the central nervous system
What is the term for the junction between a motor neuron and a muscle fiber?
Neuromuscular junction
Which component is responsible for transmitting signals from one neuron to another?
Neurotransmitters
What structure in the alveoli facilitates the exchange of gases between air and blood?
Pulmonary diffusion
What is the term for the volume of blood ejected by the heart in one contraction?
Cardiac output
Which term refers to the maximum volume of blood that the ventricle can hold during diastole?
Stroke volume
What is the pressure exerted by blood against the walls of arteries during ventricular contraction called?
Systolic pressure
Which term refers to the period of relaxation and filling of the heart chambers?
Diastole
What is the term for the amount of blood ejected from the left ventricle in one contraction?
Ejection fraction
Which term refers to the maximum amount of oxygen that an individual can utilize during intense exercise?
VO2 Max
What is the term for the process by which blood is distributed to various body tissues based on their metabolic needs?
Auto-regulation
Which term refers to the volume of blood pumped by either ventricle of the heart per minute?
Caridac output
The Frank-Starling mechanism is related to the relationship between which two cardiovascular parameters?
Stroke volume and end-diastolic volume
Which term refers to the process by which oxygen moves from the air into the blood and carbon dioxide moves from the blood into the air in the lungs?
The respiratory membrane
Test your knowledge about the composition and functions of the cardiovascular system, including topics such as blood pressure, distribution of blood, autoregulation, cardiovascular response to exercise, and cardiovascular adaptations to training.
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