#1
Which of the following is a major component of blood?
Red blood cells
ExplanationCarry oxygen to tissues and remove carbon dioxide.
#2
Which hormone is responsible for regulating blood sugar levels?
Insulin
ExplanationLowers blood glucose levels by facilitating its uptake into cells.
#3
What is the function of platelets in the blood?
Clotting
ExplanationHelps in blood clot formation to stop bleeding.
#4
Which hormone is responsible for the regulation of sodium and potassium levels in the body?
Aldosterone
ExplanationRegulates electrolyte balance and blood pressure.
#5
What is the function of white blood cells in the body?
Fight infections
ExplanationDefend the body against pathogens and foreign substances.
#6
Which hormone is responsible for the regulation of calcium levels in the blood?
Parathyroid hormone
ExplanationRegulates calcium levels in bones and blood.
#7
What is the primary function of erythropoietin (EPO)?
Stimulation of red blood cell production
ExplanationIncreases the production of red blood cells in bone marrow.
#8
Which gland is often referred to as the 'master gland'?
Pituitary gland
ExplanationControls other endocrine glands and regulates various bodily functions.
#9
Which organ secretes insulin and glucagon?
Pancreas
ExplanationProduces insulin to lower blood sugar and glucagon to raise it.
#10
Which hormone is responsible for regulating the sleep-wake cycle?
Melatonin
ExplanationRegulates sleep patterns and circadian rhythms.
#11
Which hormone is known as the 'stress hormone'?
Cortisol
ExplanationRegulates stress response, metabolism, and immune function.
#12
What is the main function of the thyroid hormone thyroxine?
Control of metabolism
ExplanationRegulates metabolism, growth, and development.
#13
Which hormone is responsible for regulating the body's metabolism?
Thyroxine
ExplanationControls metabolism and energy production.
#14
Which hormone is produced by the adrenal glands and prepares the body for 'fight or flight' response?
Adrenaline
ExplanationIncreases heart rate, blood pressure, and energy levels in response to stress.
#15
Which gland produces the hormone progesterone?
Ovaries
ExplanationPrepares the uterus for pregnancy and maintains pregnancy.
#16
What is the primary function of the hormone testosterone?
Promotion of secondary sexual characteristics in males
ExplanationDevelopment of male reproductive tissues and secondary sexual characteristics.
#17
Which hormone is responsible for promoting the growth and repair of tissues in the body?
Growth hormone
ExplanationStimulates growth, cell reproduction, and regeneration.