Health: The Endocrine System: Hormones and Glands
How chemical messengers help the body communicate and stay balanced
Health: The Endocrine System: Hormones and Glands
How chemical messengers help the body communicate and stay balanced
Health - Grade 6-8
- 1
Define the endocrine system in your own words. Include the words glands, hormones, and bloodstream in your answer.
Think of hormones as chemical messages that travel through blood.
The endocrine system is a group of glands that release hormones into the bloodstream. These hormones carry messages to different parts of the body and help control body processes. - 2
Explain how hormones are different from nerves as ways for the body to send messages.
Hormones are chemical messages that travel through the bloodstream and may take longer to act, but their effects can last longer. Nerves send fast electrical signals through nerve cells and usually cause quicker, shorter responses. - 3
The pituitary gland is sometimes called the master gland. Explain why this nickname is used.
A master gland can send signals that affect other glands.
The pituitary gland is called the master gland because it releases hormones that help control other endocrine glands. It also helps regulate growth and other important body functions. - 4
Match each gland to one important job: thyroid gland, pancreas, adrenal glands. The jobs are: helps control metabolism, helps control blood sugar, helps the body respond to stress.
The thyroid gland helps control metabolism. The pancreas helps control blood sugar. The adrenal glands help the body respond to stress. - 5
A student eats lunch, and their blood sugar rises. Explain how the pancreas helps bring blood sugar back toward a healthy level.
Insulin helps move sugar from the blood into cells.
When blood sugar rises after a meal, the pancreas releases insulin. Insulin helps body cells take in glucose from the blood, which lowers blood sugar back toward a healthy level. - 6
A person has not eaten for several hours, and their blood sugar begins to drop. Explain how the pancreas can help raise blood sugar.
When blood sugar drops, the pancreas releases glucagon. Glucagon signals the liver to release stored glucose into the blood, which helps raise blood sugar toward a healthy level. - 7
Describe one way the adrenal glands help the body during a stressful or dangerous situation.
This response is often called the fight-or-flight response.
The adrenal glands release hormones such as adrenaline during stress. Adrenaline can make the heart beat faster, increase breathing, and help the body prepare to react quickly. - 8
The thyroid gland releases hormones that affect metabolism. Explain what metabolism means in this context.
Metabolism means the chemical processes the body uses to turn food into energy and keep cells working. Thyroid hormones help control how quickly many of these processes happen. - 9
Look at this feedback loop: blood sugar rises, the pancreas releases insulin, cells take in glucose, blood sugar decreases. Identify whether this is positive feedback or negative feedback, and explain your choice.
Negative feedback helps keep body conditions stable.
This is negative feedback because the response reverses the original change. Blood sugar rises, and insulin helps bring blood sugar back down toward a normal range. - 10
Explain how hormones know which cells to affect.
Think of a receptor like a lock and the hormone like a key.
Hormones affect target cells that have matching receptors. If a cell does not have the right receptor for a hormone, the hormone usually will not affect that cell. - 11
Name two endocrine glands involved in puberty and describe one change their hormones help control.
The ovaries and testes are endocrine glands involved in puberty. Their hormones help control changes such as body growth, development of reproductive organs, and other physical changes during adolescence. - 12
The pineal gland releases melatonin. Explain how melatonin is related to sleep.
Melatonin is connected to the body's daily rhythm.
Melatonin is a hormone that helps signal the body when it is time to feel sleepy. Melatonin levels often rise in the evening and help support the sleep-wake cycle. - 13
A doctor says that a patient's endocrine system helps maintain homeostasis. Explain what homeostasis means and give one endocrine example.
Homeostasis means keeping internal body conditions within a healthy range. One endocrine example is the pancreas using insulin and glucagon to help keep blood sugar at a safe level. - 14
Complete the cause-and-effect statement: If the body needs more energy from stored sugar, then the pancreas may release the hormone __________, which helps the liver release glucose into the blood.
This hormone has the opposite effect of insulin.
The correct hormone is glucagon. Glucagon helps the liver release stored glucose into the blood when the body needs more sugar for energy. - 15
Create a simple chart with three columns labeled gland, hormone, and main effect. Fill in the chart using three of these examples: pancreas and insulin, thyroid and thyroid hormones, adrenal glands and adrenaline, pineal gland and melatonin.
A correct chart should include three accurate examples. For example, the pancreas releases insulin to lower blood sugar, the thyroid releases thyroid hormones to help control metabolism, and the adrenal glands release adrenaline to help the body respond to stress.