Welcome to the Quiz!
This quiz contains 17 questions from a mix of 1 subtopics.
What are the functions of the kidneys?
(Select all that apply)
Regulate ion levels
Remove carbon dioxide
Remove urea
Regulate water levels
Regulate growth
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Deamination
amino / carbohydrates / proteins / deamination / urea / carbon dioxide / heart / kidneys
- If the body has more acids than it needs, it can convert them into lipids or , which can be stored as an energy source for later.
- This process is known as , and takes place in the liver.
- The downside of this process is that it produces the waste product , which has to be excreted by the .
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Select two ways ions be removed from the body?
By sweating
By the kidneys
By the liver
By breathing
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True or false? Ions have many uses in the body, but if their concentration in the blood get too high, or too low, it can damage cells and make us ill.
True
False
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If we have too much water in the body, what could happen to our cells?
They could lose water and burst
They could gain water and burst
They could lose water and shrink
They could gain water and shrink
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Cells can gain or lose water by __________.
Active transport
Osmosis
Exocytosis
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Each kidney contains millions of tiny units called .
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What is the structure labelled A?
Nerve
Capillary
Tubule
Ureter
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What is the structure labelled X?
Ureter
Nerve
Tubule
Capillary
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As blood passes through the kidneys, small substances like glucose, amino acids, and water, are absorbed from the blood into the kidneys.
What do we call this process?
Urination
Selective reabsorption
Filtration (or ultrafiltration)
Deamination
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As the filtrate passes through the kidneys, useful substances like glucose are reabsorbed from the tubules, into the blood.
What do we call this process?
Filtration
Selective reabsorption
Deamination
Urination
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Which substances are not filtered from the blood into the kidney tubules?
(Select all that apply)
Red blood cells
Water
Large proteins
Glucose
Amino acids
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Which hormone is responsible for regulating water levels in the body?
Thyroxine
Adrenaline
Antidiuretic hormone (ADH)
Insulin
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Which part of the brain detects the level of water in the body?
Hypothalamus
Medulla
Cerebrum
Cerebellum
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How the body responds to low water levels
tubules / blood / more / less / pituitary / medulla / hypothalamus
- A part of the brain called the detects the low concentration of water in the bloodstream.
- This causes it to send a signal to the gland, which tells it to release antidiuretic hormone (ADH).
- The ADH travels around the body in the , and stimulates the kidneys to reabsorb more water from the into the blood.
- This means that urine will be made, and the concentration of water in the blood rises.
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Does ADH increase or decrease the concentration of water in our bloodstream?
Increase
Decrease
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What type of feedback does the body use to regulate water levels?
Positive feedback
Negative feedback
Inverse feedback
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