1) What is the main function of the endocrine system? a) To help us breathe b) To help us digest food c) To regulate and control body functions through hormones 2) Which of the following is NOT a gland of the endocrine system? a) Thyroid gland b) Pancreas c) Liver 3) What are hormones? a) Organs that produce enzymes b) Chemical messengers that regulate body functions c) Cells that transport oxygen 4) Which gland is often referred to as the "master gland" because it controls other glands in the endocrine system? a) Thyroid gland b) Adrenal gland c) Pituitary gland 5) What is the function of the thyroid gland? a) Regulating metabolism and growth b) Controlling blood sugar levels c) Producing insulin 6) Which gland is responsible for producing insulin to regulate blood sugar levels? a) Thyroid gland b) Adrenal gland c) Pancreas 7) What is the function of the adrenal glands? a) Regulating metabolism and growth b) Producing adrenaline and cortisol in response to stress c) Filtering waste products from the blood 8) Which gland is responsible for producing melatonin, a hormone that regulates sleep-wake cycles? a) Thyroid gland b) Adrenal gland c) Pineal gland 9) What is the function of the ovaries in the endocrine system? a) Producing eggs and female sex hormones b) Regulating metabolism and growth c) Controlling blood sugar levels 10) What can happen if the endocrine system is not functioning properly? a) Hormonal imbalances and health issues b) Difficulty in breathing c) Digestive problems

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