B4 Revision Quiz

Which part of natural and artificial control systems detects changes?
1. Receptors
2. Effectors
3. Processing centres
Which part of natural and artificial control systems coordinate a response to a change?
1. Receptors
2. Effectors
3. Processing centres
Which part of natural and artificial control systems produce a response to a change?
1. Receptors
2. Effectors
3. Processing centres
What is negative feedback?
1. A change from normal causes a bigger change from normal.
2. A change from normal causes the change to be reversed.
3. A change from normal causes the body to move away from the problem.
What does antagonistic mean?
1. Working with something.
2. Working against something.
3. Working to stop something.
Diffusion is the movement of substances...
1. From a low concentration to a high concentration.
2. From a high concentration to a low concentration.
3. Across a membrane.
4. When the concentration is the same in both places.
Active transport is the movement of substances...
1. From a low concentration to a high concentration.
2. From a high concentration to a low concentration.
3. Across a membrane without needing energy.
4. When the concentration is the same in both places.
For which substance is osmosis a particular example of diffusion?
1. Water
2. Oxygen
3. Carbon dioxide
4. Urea
Which of the following can be a problem if too much water enters cells?
1. The cell membrane may break (rupture).
2. The cytoplasm may be too dilute for chemical reactions to work properly.
3. The cytoplasm may be too concentrated for chemical reactions to work properly.
4. The cell membrane may become dehydrated.
Enzymes are catalysts in cells. What are they made of?
1. Protein
2. Carbohydrate
3. Fat
4. Water
The part of an enzyme where reactants bind to it is called its...
1. Active site
2. Lock and key
3. Active key
4. Key site
Which factor is likely to speed up an enzyme reaction?
1. low pH
2. High temperature
3. A small increase in temperature
4. A small decrease in temperature
Which of these are ways that the body gains water?
1. Food and drink
2. Cell respiration
3. Excretion of urine
4. Breathing
5. Sweating
Which of these processes are in the best order describing how the kidneys regulate water?
1. Filtration, reabsorption, excretion
2. Reabsorption, filtration, excretion
3. Excretion, filtration, reabsorption
4. Filtration, excretion, reabsorption
What would be the effect on urine of playing sport on a hot day.
1. volume would be low and concentration would be high
2. volume would be low and concentration would be low
3. volume would be high and concentration would be low
4. volume would be high and concentration would be high
Which part of the body detects and coordinates water concentration?
1. Brain
2. Kidneys
3. Liver
4. Bladder
Which hormone regulates water concentration by altering the volume of urine the body produces?
1. ADH
2. Insulin
3. Oestrogen
4. Adrenalin
Which is usually true?
1. Core temperature is the same as the temperature of the extremities.
2. Core temperature is higher than the temperature of the extremities.
3. Core temperature is lower than the temperature of the extremities.
Whcih of these responses help the body cool?
1. Sweating
2. Vasodilation
3. Shivering
4. Vasoconstriction
Hypothermia is when...
1. More heat is being lost than is replaced
2. More heat is gained than is lost
3. The core temperature is too high
4. The core temperature is too low