#1
Which muscle is responsible for flexing the forearm?
Biceps brachii
ExplanationBiceps brachii flexes the forearm.
#2
What is the primary function of the deltoid muscle?
Abduction of the shoulder
ExplanationDeltoid muscle primarily abducts the shoulder.
#3
What is the recommended frequency of aerobic exercise for general health benefits?
Five times a week
ExplanationFive times a week is the recommended frequency of aerobic exercise for general health benefits.
#4
Which muscle is known as the 'quads' and is a group of four muscles at the front of the thigh?
Quadriceps
ExplanationQuadriceps, also known as 'quads,' is a group of four muscles at the front of the thigh.
#5
What is the term for the decrease in muscle mass and strength that occurs with aging?
Sarcopenia
ExplanationSarcopenia is the decrease in muscle mass and strength with aging.
#6
Which muscle is responsible for plantar flexion of the foot?
Soleus
ExplanationSoleus muscle is responsible for plantar flexion of the foot.
#7
During exercise, what is the primary source of energy for short, intense bursts of activity, such as weightlifting or sprinting?
Carbohydrates
ExplanationCarbohydrates are the primary source of energy for short, intense bursts of activity.
#8
What is the term for the point at which a muscle fully contracts, and no further movement is possible?
Muscle contraction threshold
ExplanationMuscle contraction threshold is the point of full contraction with no further movement.
#9
What is the term for the muscle action where the muscle lengthens while producing tension?
Eccentric contraction
ExplanationEccentric contraction is when the muscle lengthens while producing tension.
#10
Which hormone is responsible for promoting muscle growth and protein synthesis?
Testosterone
ExplanationTestosterone promotes muscle growth and protein synthesis.
#11
Which type of muscle fibers are primarily used for endurance activities such as long-distance running?
Type I fibers
ExplanationType I fibers are primarily used for endurance activities like long-distance running.
#12
Which of the following is a benefit of stretching exercises for the muscles?
Reduced risk of injury
ExplanationStretching exercises for muscles reduce the risk of injury.
#13
Which of the following is NOT a component of the SAID principle in exercise physiology?
Dynamic
ExplanationDynamic is not a component of the SAID principle.
#14
What is the term for the excessive enlargement of muscles due to hypertrophy?
Muscular hypertrophy
ExplanationMuscular hypertrophy is the excessive enlargement of muscles due to hypertrophy.
#15
What is the phenomenon where a muscle becomes less responsive to a constant stimulus over time?
Muscle accommodation
ExplanationMuscle accommodation is when a muscle becomes less responsive to a constant stimulus over time.
#16
Which of the following is a function of the smooth muscle in the human body?
Involuntary movement
ExplanationSmooth muscle in the human body is responsible for involuntary movement.
#17
What is the term for the excessive curvature of the spine, often associated with weak abdominal muscles?
Lordosis
ExplanationLordosis is the excessive curvature of the spine, often associated with weak abdominal muscles.
#18
In the context of muscle contractions, what does the term 'agonist' refer to?
Muscle responsible for the primary action
ExplanationIn muscle contractions, 'agonist' refers to the muscle responsible for the primary action.