What do you know about hormones?
Hormones and Metabolism Quiz
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Drag and drop to match the hormone to the organ that produces it
- Adrenal gland
- Thyroid gland
Drag and drop to match the definition to the term
- Target organ
- Metabolic rate
- An organ that is affected by a specific hormone
- Chemicals that transmit messages through the blood to organs
- How quickly energy from food is consumed by your body
What are two systems which allow your body to respond to its surroundings?CorrectIncorrect
Which of the following descriptions best matches the hormonal system?CorrectIncorrect
Growth hormone stimulates cells in muscles and bones to divide. It also stimulates another system, which system is this?CorrectIncorrect
Growth is increased during puberty. Why is this?CorrectIncorrect
Resting metabolic rate is measured under which of the following conditions?CorrectIncorrect
Increases in thyroxine concentration in the blood cause a decrease in the amount of thyroxine released. What kind of feedback mechanism is this?
Which hormone is associated with the “fight or flight” response?CorrectIncorrect
Upon the release of adrenaline do blood vessels widen, narrow or both?CorrectIncorrect
What effect does adrenaline have on the liver?CorrectIncorrect
What effects does adrenaline have on the heart?CorrectIncorrect
When is adrenaline released?CorrectIncorrect
Put the following steps in order to explain how the thyroxine feedback mechanism works.
Starting from: low levels of thyroxine stimulates production of TRH in hypothalamus
- TSH acts on the thyroid to produce thyroxine
- the normal thyroxine level inhibits the release of TRH and the production of TSH
- causes release of TSH from the pituitary gland
A hormone is responsible for preparing the body for action, for example, if you see a tiger, you need to be prepared to run or fight. How does this hormone prepare the muscles for your reaction to the tiger?CorrectIncorrect
Where are hormones produced?CorrectIncorrect
What do You Need to Know about Hormones for GCSE biology?
At GCSE level you need to understand the following 6 points:
- What the difference is in function and scope between the nervous system and the hormonal system.
- What the main glands are and which hormones they produce.
- What the roles of the various hormones are.
- What a negative feedback loop is.
- What the target organs of specific hormones are.
- How the metabolic rate is influenced by hormones.
What are Hormones and What is the Hormonal System?
Hormones are chemicals that are released by glands around our bodies, these chemicals interact with our bodily functions to cause a change in response to internal or environmental stimuli.
The goal of the hormonal system is to regulate the internal environment and maintain optimal conditions for any situation that might occur. The most familiar example to us is the “fight or flight” response which is a response to excitement or danger which has allowed humans to survive in highly dangerous and diverse environments for hundreds of thousands of years.
Today the “fight or flight” response which is caused by the release of adrenaline, helps us to perform at high levels during stressful situations like when playing sports and sometimes at work. The release of adrenaline causes vasodilation and vasoconstriction simultaneously in different blood vessels. This happens to restrict blood flow to temporarily less important systems and enhance blood flow to urgently required systems, such as the muscular system.
Hormones have many other roles, such as coordinating our metabolism and stimulating growth.