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Biology - Homeostasis and Kidneys (3a)

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-homeostasis -waste products -kidneys -when our body gets too hot/cold
Mrs. Reema Al Bitar
Quiz by Mrs. Reema Al Bitar, updated more than 1 year ago More Less
Amy Arthur
Created by Amy Arthur over 8 years ago
Mrs. Reema Al Bitar
Copied by Mrs. Reema Al Bitar over 8 years ago
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Resource summary

Question 1

Question
What is homeostasis?
Answer
  • The maintenance of a constant internal environment
  • The maintenance of a person's body (internal and external)

Question 2

Question
What are the things that need to be controlled in our body?
Answer
  • Body temperature
  • Water content
  • Ion content
  • Blood sugar levels
  • CO2
  • Urea
  • Proteins
  • Sweating

Question 3

Question
What is the temperature at which enzymes work best?
Answer
  • 20oC
  • 27oC
  • 30oC
  • 37oC

Question 4

Question
Why is it important to control our body's water content?
Answer
  • Too much water could move into or out of our cells which will damage the cells.
  • Too much water could move into the cells making us over-hydrated and the cells won't work as well.
  • Not enough water could move into the cells meaning that they will get dehydrated and won't work as well.

Question 5

Question
If the ion (or water) content of the body is wrong, it could upset the balance between ion and water. Why is this?
Answer
  • Too much/too little water is drawn in by osmosis > damages the cells
  • Too much/too little water is drawn in by diffusion > damages the cells
  • Too much/too little water is drawn in by active transport > damages the cells

Question 6

Question
What are the two waste products of our body that need to be controlled?
Answer
  • Carbon Dioxide
  • Urea
  • Carbon Monoxide
  • Urine

Question 7

Question
How is CO2 removed from the body?
Answer
  • By the lungs
  • By the liver
  • By the windpipe

Question 8

Question
Where does urea come from?
Answer
  • The reactions from the conversion of excess amino acids to fats and carbohydrates
  • The excess products from our food that we consume

Question 9

Question
Urea is made from excess amino acids and is made in the liver
Answer
  • True
  • False

Question 10

Question
Urea is not poisonous and is released into the bloodstream by the kidney
Answer
  • True
  • False

Question 11

Question
What organ filters the blood?
Answer
  • Liver
  • Small intestine
  • Large intestine
  • Kidney
  • Lungs

Question 12

Question
How is urea removed from the body?
Answer
  • Filtered from the blood by the kidneys > temporarily stored in the bladder > excreted from the body in urine
  • Filtered from the blood by the liver > temporarily stored in the small intestine then to the large intestine > excreted through faeces

Question 13

Question
How do ions enter the blood?
Answer
  • Taken in by what we drink and then absorbed into the blood
  • Taken in by the food we eat and then absorbed into the blood
  • Taken in by what we eat and drink and then absorbed into the blood

Question 14

Question
Excess ions are removed by the liver
Answer
  • True
  • False

Question 15

Question
How are some ions also lost?
Answer
  • Sweating
  • Breathing
  • Farting

Question 16

Question
The kidneys also adjust the water content of the blood to keep it controlled
Answer
  • True
  • False

Question 17

Question
Water is taken into our body as food and drink. How is it lost?
Answer
  • Sweating
  • Breathing out
  • Urinating
  • In faeces
  • Breathing in

Question 18

Question
We can control how much water is lost through breathing
Answer
  • True
  • False

Question 19

Question
We can control our water content through how much is consumed, sweated out and the amount that is excreted by kidneys in urine
Answer
  • True
  • False

Question 20

Question
When our body gets too hot...
Answer
  • Hairs lie flat
  • Hairs stand up (to trap insulating layer of air)
  • Sweat is produced, evaporating heat from the body
  • No sweat is produced
  • Blood vessels supplying the skin dilate
  • Blood vessels supplying the skin constrict
  • Our muscles constrict (shivering)

Question 21

Question
When our body gets too cold...
Answer
  • Hairs lie flat
  • Hairs stand up (to trap insulating layer of air)
  • Sweat is produced, evaporating heat from the body
  • No sweat is produced
  • Blood vessels supplying the skin dilate
  • Blood vessels supplying the skin constrict
  • Our muscles constrict (shivering)

Question 22

Question
On a cold day...
Answer
  • We sweat and have more urine (pale coloured and dilute)
  • We sweat and have less urine (dark coloured and concentrated)
  • We don't sweat and have more urine (pale coloured and dilute)
  • We don't sweat and have less urine (dark coloured and concentrated)

Question 23

Question
On a hot day...
Answer
  • We sweat and have more urine (pale coloured and dilute)
  • We sweat and have less urine (dark coloured and concentrated)
  • We don't sweat and have more urine (pale coloured and dilute)
  • We don't sweat and have less urine (dark coloured and concentrated)

Question 24

Question
Sports drinks are good to consume because they replace water, sugar and ions that are used up during exercise
Answer
  • True
  • False
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