#1
Which of the following is NOT a function of the skeletal system?
Protection of internal organs
Production of red blood cells
Storage of minerals
Facilitation of movement
#2
What is the primary function of the cardiovascular system?
Transportation of nutrients and gases
Synthesis of hormones
Digestion of food
Generation of body heat
#3
Which hormone is primarily responsible for regulating blood glucose levels?
Insulin
Glucagon
Estrogen
Testosterone
#4
What is the role of the lymphatic system in the human body?
Transporting oxygen to cells
Digesting food
Filtering waste products from the blood
Maintaining fluid balance and defending against pathogens
#5
What is the main function of the respiratory system?
Pumping blood throughout the body
Regulating body temperature
Exchange of gases between the body and the environment
Digesting food
#6
Which of the following muscles is responsible for extension of the forearm?
Biceps brachii
Triceps brachii
Deltoid
Pectoralis major
#7
Which neurotransmitter is released at the neuromuscular junction to stimulate muscle contraction?
Dopamine
Serotonin
Acetylcholine
GABA
#8
Which type of muscle tissue is under voluntary control?
Cardiac muscle
Smooth muscle
Skeletal muscle
Visceral muscle
#9
What is the functional unit of a muscle called?
Sarcomere
Neuromuscular junction
Myofibril
Muscle fiber
#10
What is the function of the sarcoplasmic reticulum in muscle cells?
Storage and release of calcium ions
Synthesis of ATP
Conduction of action potentials
Production of myoglobin
#11
During anaerobic respiration in muscles, what is the byproduct that leads to muscle fatigue?
Carbon dioxide
Lactic acid
Water
Glucose
#12
Which of the following is NOT a characteristic of slow-twitch muscle fibers?
High resistance to fatigue
Rich in mitochondria
Primarily utilize aerobic metabolism
Generate rapid force
#13
What is the term for the ability of a muscle to return to its original length after contraction?
Tetanus
Tonus
Elasticity
Contractility
#14
Which of the following is NOT a function of the integumentary system?
Protection against pathogens
Synthesis of vitamin D
Regulation of body temperature
Production of red blood cells
#15
Which of the following is NOT a function of the endocrine system?
Regulation of metabolism
Maintenance of electrolyte balance
Coordination of voluntary movements
Regulation of growth and development