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(a) To remove soluble substances, both toxic/ harmful substances e.g. urea or nitrogenous waste and useful from the blood stream.
(b) To return/ reabsorb useful substances e.g. glucose and Amino acids back into the bloodstream that had been ultra-filtrated leaving only the wastes .
johnmulu answered the question on May 5, 2017 at 05:38
- (a)Which portion of the human nephron are only found in the cortex?
(b) (i) What would happen if a person produces less antidiuretic hormone?
(ii) What term is given to the condition described in (c) (i) above(Solved)
(a)Which portion of the human nephron are only found in the cortex?
(b) (i) What would happen if a person produces less antidiuretic hormone?
(ii) What term is given to the condition described in (c) (i) above
Date posted: May 5, 2017. Answers (1)
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(b) Name the hormones involved in regulating glucose level in blood. (Solved)
(a) What is the meaning of the terms (i) Homeostasis (ii) Osmoregulation?
(b) Name the hormones involved in regulating glucose level in blood.
Date posted: May 5, 2017. Answers (1)
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State the role insulin in human body.
Date posted: May 5, 2017. Answers (1)
- (a) Name the fluid that is produced by sebaceous glands
(b) What is the role of sweat in human skin?(Solved)
(a) Name the fluid that is produced by sebaceous glands
(b) What is the role of sweat in human skin?
Date posted: May 5, 2017. Answers (1)
- The diagram below shows a section through the mammalian skin. (Solved)
The diagram below shows a section through the mammalian skin.
(a) Name the parts labeled E, F and G
(b) State two functions in each case of substance secreted by the structures labeled (i) H (ii) I.
Date posted: May 5, 2017. Answers (1)
- (a) Explain how marine fish regulate their osmotic pressure
(b) Explain the role of antidiuretic hormone when there is excess water in the human body(Solved)
(a) Explain how marine fish regulate their osmotic pressure
(b) Explain the role of antidiuretic hormone when there is excess water in the human body
Date posted: May 5, 2017. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- State the importance of osmo-regulation in organisms. (Solved)
State the importance of osmo-regulation in organisms.
Date posted: May 4, 2017. Answers (1)
- 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. 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
Date posted: May 4, 2017. Answers (1)
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State the economic importance of anaerobic respiration in plants.
Date posted: May 4, 2017. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- (a) Name the type of respiration that is most efficient.
(b) Give a reason for your answer in (a) above(Solved)
(a) Name the type of respiration that is most efficient.
(b) Give a reason for your answer in (a) above
Date posted: May 4, 2017. Answers (1)
- (a) Give two differences in the products of anaerobic respiration between plants and animals.
(b) Name the site of anaerobic respiration in a cell. (Solved)
(a) Give two differences in the products of anaerobic respiration between plants and animals.
(b) Name the site of anaerobic respiration in a cell.
Date posted: May 4, 2017. Answers (1)
- 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. Answers (1)