#1
Which of the following is NOT a function of the skeletal system?
Facilitation of movement
ExplanationSkeletal system provides structural support and protection.
#2
What is the primary function of the cardiovascular system?
Transportation of nutrients and gases
ExplanationHeart and blood vessels circulate substances throughout the body.
#3
Which hormone is primarily responsible for regulating blood glucose levels?
Insulin
ExplanationInsulin lowers blood glucose levels.
#4
What is the role of the lymphatic system in the human body?
Maintaining fluid balance and defending against pathogens
ExplanationLymphatic system helps in immunity and fluid balance.
#5
What is the main function of the respiratory system?
Exchange of gases between the body and the environment
ExplanationRespiratory system facilitates gas exchange.
#6
Which of the following muscles is responsible for extension of the forearm?
Triceps brachii
ExplanationTriceps brachii extends the forearm.
#7
Which neurotransmitter is released at the neuromuscular junction to stimulate muscle contraction?
Acetylcholine
ExplanationAcetylcholine initiates muscle contraction.
#8
Which type of muscle tissue is under voluntary control?
Skeletal muscle
ExplanationSkeletal muscles are controlled consciously.
#9
What is the functional unit of a muscle called?
Sarcomere
ExplanationSarcomere is the basic unit of muscle contraction.
#10
What is the function of the sarcoplasmic reticulum in muscle cells?
Storage and release of calcium ions
ExplanationSarcoplasmic reticulum regulates calcium levels during muscle contraction.
#11
During anaerobic respiration in muscles, what is the byproduct that leads to muscle fatigue?
Lactic acid
ExplanationAccumulation of lactic acid causes muscle fatigue.
#12
Which of the following is NOT a characteristic of slow-twitch muscle fibers?
Generate rapid force
ExplanationSlow-twitch fibers are not designed for rapid force generation.
#13
What is the term for the ability of a muscle to return to its original length after contraction?
Elasticity
ExplanationElasticity is the property of muscles to return to initial length.
#14
Which of the following is NOT a function of the integumentary system?
Production of red blood cells
ExplanationIntegumentary system is not involved in blood cell production.
#15
Which of the following is NOT a function of the endocrine system?
Coordination of voluntary movements
ExplanationEndocrine system regulates hormones, not voluntary movements.