Biology MCQs

Human Physiology MCQs with Answers

Which of the following is the primary function of the respiratory system?
a) Transporting oxygen to body tissues
b) Regulating body temperature
c) Filtering waste products from the blood
d) Regulating blood glucose levels
Answer: a) Transporting oxygen to body tissues

Which of the following organs is responsible for filtering waste products from the blood and producing urine?
a) Liver
b) Kidneys
c) Pancreas
d) Spleen
Answer: b) Kidneys

Which hormone is responsible for regulating blood sugar levels in the body?
a) Insulin
b) Estrogen
c) Testosterone
d) Thyroxine
Answer: a) Insulin

The digestive enzyme amylase is responsible for breaking down which macronutrient?
a) Proteins
b) Fats
c) Carbohydrates
d) Minerals
Answer: c) Carbohydrates

Which of the following is responsible for the production of red blood cells?
a) Liver
b) Pancreas
c) Spleen
d) Bone marrow
Answer: d) Bone marrow

Which of the following is the largest organ in the human body?
a) Liver
b) Heart
c) Brain
d) Lungs
Answer: a) Liver

Which of the following hormones is responsible for regulating metabolism in the body?
a) Insulin
b) Thyroxine
c) Estrogen
d) Testosterone
Answer: b) Thyroxine

Which of the following is responsible for the production and secretion of digestive enzymes?
a) Pancreas
b) Liver
c) Stomach
d) Gallbladder
Answer: a) Pancreas

Which of the following is the primary function of the nervous system?
a) Controlling voluntary movements
b) Regulating body temperature
c) Transporting oxygen to body tissues
d) Regulating blood glucose levels
Answer: a) Controlling voluntary movements

Which of the following is responsible for the production and secretion of insulin?
a) Pancreas
b) Liver
c) Stomach
d) Gallbladder
Answer: a) Pancreas

Which of the following is responsible for the transport of oxygenated blood to the body tissues?
a) Arteries
b) Veins
c) Capillaries
d) Lymph vessels
Answer: a) Arteries

Which of the following is the primary function of the skeletal system?
a) Protection of internal organs
b) Regulation of body temperature
c) Production of red blood cells
d) Secretion of hormones
Answer: a) Protection of internal organs

Which of the following hormones is responsible for the development of secondary sexual characteristics in males?
a) Estrogen
b) Progesterone
c) Testosterone
d) Insulin
Answer: c) Testosterone

Which of the following is responsible for the production and secretion of bile?
a) Pancreas
b) Liver
c) Stomach
d) Gallbladder
Answer: b) Liver

Which of the following is the primary function of the circulatory system?
a) Transporting nutrients and oxygen to body tissues
b) Regulating body temperature
c) Filtering waste products from the blood
d) Regulating blood glucose levels
Answer: a) Transporting nutrients and oxygen to body tissues

Which of the following is responsible for the production and secretion of the hormone estrogen?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: a) Ovaries

Which of the following is the primary function of the muscular system?
a) Movement of body parts
b) Regulation of body temperature
c) Production of red blood cells
d) Secretion of hormones
Answer: a) Movement of body parts

Which of the following is responsible for the regulation of body temperature?
a) Liver
b) Pancreas
c) Hypothalamus
d) Spleen
Answer: c) Hypothalamus

Which of the following is responsible for the production and secretion of the hormone progesterone?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: a) Ovaries

Which of the following is the primary function of the immune system?
a) Defense against pathogens
b) Regulation of body temperature
c) Transporting oxygen to body tissues
d) Regulating blood glucose levels
Answer: a) Defense against pathogens

Which of the following is responsible for the production and secretion of the hormone adrenaline?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: c) Adrenal glands

Which of the following is the primary function of the endocrine system?
a) Regulation of body temperature
b) Production of red blood cells
c) Secretion of hormones
d) Filtering waste products from the blood
Answer: c) Secretion of hormones

Which of the following is responsible for the production and secretion of the hormone melatonin?
a) Ovaries
b) Testes
c) Pineal gland
d) Thyroid gland
Answer: c) Pineal gland

Which of the following is the primary function of the integumentary system?
a) Protection against external threats
b) Regulation of body temperature
c) Production of red blood cells
d) Secretion of hormones
Answer: a) Protection against external threats

Which of the following is responsible for the production and secretion of the hormone oxytocin?
a) Ovaries
b) Testes
c) Pituitary gland
d) Thyroid gland
Answer: c) Pituitary gland

Which of the following is the primary function of the reproductive system?
a) Reproduction and continuation of the species
b) Regulation of body temperature
c) Transporting oxygen to body tissues
d) Regulating blood glucose levels
Answer: a) Reproduction and continuation of the species

Which of the following is responsible for the production and secretion of the hormone insulin-like growth factor (IGF-1)?
a) Ovaries
b) Testes
c) Adrenal glands
d) Liver
Answer: d) Liver

Which of the following is the primary function of the excretory system?
a) Removal of waste products from the body
b) Regulation of body temperature
c) Production of red blood cells
d) Secretion of hormones
Answer: a) Removal of waste products from the body

Which of the following is responsible for the production and secretion of the hormone thyroxine?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: d) Thyroid gland

Which of the following is the primary function of the cardiovascular system?
a) Transporting oxygen and nutrients to body tissues
b) Regulating body temperature
c) Filtering waste products from the blood
d) Regulating blood glucose levels
Answer: a) Transporting oxygen and nutrients to body tissues

Which of the following is responsible for the production and secretion of the hormone cortisol?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: c) Adrenal glands

Which of the following is the primary function of the urinary system?
a) Filtering waste products from the blood and producing urine
b) Regulation of body temperature
c) Production of red blood cells
d) Secretion of hormones
Answer: a) Filtering waste products from the blood and producing urine

Which of the following is responsible for the production and secretion of the hormone growth hormone (GH)?
a) Ovaries
b) Testes
c) Pituitary gland
d) Thyroid gland
Answer: c) Pituitary gland

Which of the following is the primary function of the digestive system?
a) Breaking down and absorbing nutrients from food
b) Regulating body temperature
c) Filtering waste products from the blood
d) Regulating blood glucose levels
Answer: a) Breaking down and absorbing nutrients from food

Which of the following is responsible for the production and secretion of the hormone progesterone?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: a) Ovaries

Which of the following is the primary function of the lymphatic system?
a) Defense against pathogens and removal of waste products
b) Regulation of body temperature
c) Transporting oxygen to body tissues
d) Regulating blood glucose levels
Answer: a) Defense against pathogens and removal of waste products

Which of the following is responsible for the production and secretion of the hormone estrogen?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: a) Ovaries

Which of the following is the primary function of the endocrine system?
a) Regulation of body temperature
b) Production of red blood cells
c) Secretion of hormones
d) Filtering waste products from the blood
Answer: c) Secretion of hormones

Which of the following is responsible for the production and secretion of the hormone melatonin?
a) Ovaries
b) Testes
c) Pineal gland
d) Thyroid gland
Answer: c) Pineal gland

Which of the following is the primary function of the muscular system?
a) Movement of body parts
b) Regulation of body temperature
c) Production of red blood cells
d) Secretion of hormones
Answer: a) Movement of body parts

Which of the following is responsible for the regulation of body temperature?
a) Liver
b) Pancreas
c) Hypothalamus
d) Spleen
Answer: c) Hypothalamus

Which of the following is responsible for the production and secretion of the hormone progesterone?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: a) Ovaries

Which of the following is the primary function of the immune system?
a) Defense against pathogens
b) Regulation of body temperature
c) Transporting oxygen to body tissues
d) Regulating blood glucose levels
Answer: a) Defense against pathogens

Which of the following is responsible for the production and secretion of the hormone adrenaline?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: c) Adrenal glands

Which of the following is the primary function of the reproductive system?
a) Reproduction and continuation of the species
b) Regulation of body temperature
c) Transporting oxygen to body tissues
d) Regulating blood glucose levels
Answer: a) Reproduction and continuation of the species

Which of the following is responsible for the production and secretion of the hormone insulin-like growth factor (IGF-1)?
a) Ovaries
b) Testes
c) Adrenal glands
d) Liver
Answer: d) Liver

Which of the following is the primary function of the excretory system?
a) Removal of waste products from the body
b) Regulation of body temperature
c) Production of red blood cells
d) Secretion of hormones
Answer: a) Removal of waste products from the body

Which of the following is responsible for the production and secretion of the hormone thyroxine?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: d) Thyroid gland

Which of the following is the primary function of the cardiovascular system?
a) Transporting oxygen and nutrients to body tissues
b) Regulating body temperature
c) Filtering waste products from the blood
d) Regulating blood glucose levels
Answer: a) Transporting oxygen and nutrients to body tissues

Which of the following is responsible for the production and secretion of the hormone cortisol?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: c) Adrenal glands

Which of the following is the primary function of the urinary system?
a) Filtering waste products from the blood and producing urine
b) Regulation of body temperature
c) Production of red blood cells
d) Secretion of hormones
Answer: a) Filtering waste products from the blood and producing urine

Which of the following is responsible for the production and secretion of the hormone growth hormone (GH)?
a) Ovaries
b) Testes
c) Pituitary gland
d) Thyroid gland
Answer: c) Pituitary gland

Which of the following is the primary function of the respiratory system?
a) Gas exchange and supplying oxygen to body tissues
b) Regulating body temperature
c) Filtering waste products from the blood
d) Regulating blood glucose levels
Answer: a) Gas exchange and supplying oxygen to body tissues

Which of the following is responsible for the production and secretion of the hormone insulin?
a) Ovaries
b) Testes
c) Pancreas
d) Thyroid gland
Answer: c) Pancreas

Which of the following is the primary function of the nervous system?
a) Transmitting and processing information
b) Regulating body temperature
c) Transporting oxygen to body tissues
d) Regulating blood glucose levels
Answer: a) Transmitting and processing information

Which of the following is responsible for the production and secretion of the hormone growth hormone (GH)?
a) Ovaries
b) Testes
c) Pituitary gland
d) Thyroid gland
Answer: c) Pituitary gland

Which of the following is the primary function of the skeletal system?
a) Support and protection of the body
b) Regulation of body temperature
c) Production of red blood cells
d) Secretion of hormones
Answer: a) Support and protection of the body

Which of the following is responsible for the production and secretion of the hormone oxytocin?
a) Ovaries
b) Testes
c) Pituitary gland
d) Thyroid gland
Answer: c) Pituitary gland

Which of the following is the primary function of the digestive system?
a) Breaking down and absorbing nutrients from food
b) Regulating body temperature
c) Filtering waste products from the blood
d) Regulating blood glucose levels
Answer: a) Breaking down and absorbing nutrients from food

Which of the following is responsible for the production and secretion of the hormone progesterone?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: a) Ovaries

Which of the following is the primary function of the integumentary system?
a) Protection against external threats
b) Regulation of body temperature
c) Production of red blood cells
d) Secretion of hormones
Answer: a) Protection against external threats

Which of the following is responsible for the production and secretion of the hormone testosterone?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: b) Testes

Which of the following is the primary function of the endocrine system?
a) Regulation of body temperature
b) Production of red blood cells
c) Secretion of hormones
d) Filtering waste products from the blood
Answer: c) Secretion of hormones

Which of the following is responsible for the production and secretion of the hormone melatonin?
a) Ovaries
b) Testes
c) Pineal gland
d) Thyroid gland
Answer: c) Pineal gland

Which of the following is the primary function of the muscular system?
a) Movement of body parts
b) Regulation of body temperature
c) Production of red blood cells
d) Secretion of hormones
Answer: a) Movement of body parts

Which of the following is responsible for the regulation of body temperature?
a) Liver
b) Pancreas
c) Hypothalamus
d) Spleen
Answer: c) Hypothalamus

Which of the following is responsible for the production and secretion of the hormone progesterone?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: a) Ovaries

Which of the following is the primary function of the immune system?
a) Defense against pathogens
b) Regulation of body temperature
c) Transporting oxygen to body tissues
d) Regulating blood glucose levels
Answer: a) Defense against pathogens

Which of the following is responsible for the production and secretion of the hormone adrenaline?
a) Ovaries
b) Testes
c) Adrenal glands
d) Thyroid gland
Answer: c) Adrenal glands

Which of the following is the primary function of the reproductive system?
a) Reproduction and continuation of the species
b) Regulation of body temperature
c) Transporting oxygen to body tissues
d) Regulating blood glucose levels
Answer: a) Reproduction and continuation of the species

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