(a)
- Swallow plenty of sea water to increase amount of water in the body
- Have chloride secretory cells in the gills to remove excess salts
- Few/ small glomeruli; thus slow filtration rate in the kidneys
- Eliminate nitrogenous waste in form of trimethylamine which requires little water for excretion
(b) Less ADH is secreted by pituitary gland hence the tubule become less permeable to water, causing less reabsorption of water in the kidney tubules, resulting in a lot of dilute urine
johnmulu answered the question on May 5, 2017 at 04:46
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The diagram below represents a mammalian nephron
(Solved)
The diagram below represents a mammalian nephron
(a) Name the
(i)structure labeled P.
(ii) Portion of the nephron between point X and Y.
(b) Name the process that takes place at point Q.
(c) Name one substance present at point R but absent at point S in healthy mammal
Date posted:
May 4, 2017
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Answers (1)
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Adult elephants flap their ears twice as much as their calves in order to cool their bodies when is it hot. Explain.
(Solved)
Adult elephants flap their ears twice as much as their calves in order to cool their bodies when is it hot. Explain.
Date posted:
May 4, 2017
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Answers (1)
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The temperature of a person was taken before, during and after taking a cold bath. The results are shown in the graph below.
(Solved)
The temperature of a person was taken before, during and after taking a cold bath. The results are shown in the graph below.
(a)Explain why the temperature fell during bath.
(b) What changes occurred in the skin that enabled the body temperature to return to normal?
Date posted:
May 4, 2017
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Answers (1)
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State the importance of osmo-regulation in organisms.
(Solved)
State the importance of osmo-regulation in organisms.
Date posted:
May 4, 2017
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Answers (1)
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Give reasons for each of the following: (a) Constant body temperature is maintained in mammals.
(b) Low blood sugar level is harmful to the body.
(Solved)
Give reasons for each of the following: (a) Constant body temperature is maintained in mammals.
(b) Low blood sugar level is harmful to the body.
Date posted:
May 4, 2017
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Answers (1)
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A person was found to pass out large volumes of dilute urine frequently. Name the (a) Disease the person was suffering from, (b) Hormone that was deficient
(Solved)
A person was found to pass out large volumes of dilute urine frequently. Name the (a) Disease the person was suffering from, (b) Hormone that was deficient
Date posted:
May 4, 2017
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Answers (1)
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State the economic importance of anaerobic respiration in plants.
(Solved)
State the economic importance of anaerobic respiration in plants.
Date posted:
May 4, 2017
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Answers (1)
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The diagram below shows an experimental set-up to investigate a certain physiological process in plants .
(Solved)
The diagram below shows an experimental set-up to investigate a certain physiological process in plants .
(a) State the aim of the experiment
(b) Account for the expected colour change in tube F.
Date posted:
May 4, 2017
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Answers (1)
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State two reasons why accumulation of lactic acids leads to an increase in heartbeat.
(Solved)
State two reasons why accumulation of lactic acids leads to an increase in heartbeat.
Date posted:
May 4, 2017
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Answers (1)
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Name the three end products of anaerobic respiration in plants.
(Solved)
Name the three end products of anaerobic respiration in plants.
Date posted:
May 4, 2017
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Answers (1)
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The diagram below represents a set-up that students used in an investigation.
(Solved)
The diagram below represents a set-up that students used in an investigation.
(a) Name the physiological process that was being investigated.
(b) State the role of potassium hydroxide in flask K.
Date posted:
May 4, 2017
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Answers (1)
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In an experiment, disinfected soaked bean seeds were put in a vacuum flask which was then fitted with a thermometer as shown in the diagram below.
(Solved)
In an experiment, disinfected soaked bean seeds were put in a vacuum flask which was then fitted with a thermometer as shown in the diagram below.
The temperature reading were taken every morning for three consecutive days
(a) Which process was being investigated?
(b) Why were the seeds disinfected?
(c) Why was a vacuum flask used in the set-up?
(d) How would a control for this experiment be set?
Date posted:
May 4, 2017
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Answers (1)
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State two ways in which anaerobic respiration is applied in industries
(Solved)
State two ways in which anaerobic respiration is applied in industries
Date posted:
May 4, 2017
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Answers (1)
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How are the mitochondria adapted their functions?
(Solved)
How are the mitochondria adapted their functions?
Date posted:
May 4, 2017
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Answers (1)
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Explain how anaerobic respiration is applied in sewage treatment
(Solved)
Explain how anaerobic respiration is applied in sewage treatment
Date posted:
May 4, 2017
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Answers (1)
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Explain what happens when there is oxygen debt in human muscles
(Solved)
Explain what happens when there is oxygen debt in human muscles
Date posted:
May 4, 2017
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Answers (1)
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Give three factors that determine the amount of energy a human being require in a day
(Solved)
Give three factors that determine the amount of energy a human being require in a day
Date posted:
May 4, 2017
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Answers (1)
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(a) Name the products of anaerobic respiration in
(i) Plants(ii) Animals
(b) What is oxygen debt?
(Solved)
(a) Name the products of anaerobic respiration in
(i) Plants(ii) Animals
(b) What is oxygen debt?
Date posted:
May 4, 2017
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Answers (1)
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(a) A dog weighing 15.2 kg requires 216kj while a mouse weighing 50g requires 2736kj per day. Explain.
(b) What is the end-product of respiration in animals when there is insufficient oxygen supply?
(Solved)
(a) A dog weighing 15.2 kg requires 216kj while a mouse weighing 50g requires 2736kj per day. Explain.
(b) What is the end-product of respiration in animals when there is insufficient oxygen supply?
Date posted:
May 4, 2017
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Answers (1)
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Name the substance which accumulates in muscles when respiration occurs with insufficient oxygen.
(Solved)
Name the substance which accumulates in muscles when respiration occurs with insufficient oxygen.
Date posted:
May 4, 2017
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Answers (1)