i) Subcutaneous/ Adipose fat insulates; facilitating heat conservation
ii) Hair raised/ erects; by contraction of erector pili muscle; Insulator increased/ traps
air; facilitating heat conservation
iii) Cutaneous/ superficial blood vessel vasoconstrict blood flows deep in the
dermis; conserving heat
iv) Sweating/ panting stops; little heat is conserved
v) Extra heat is produced; by increase in metabolic rate of liver/ muscles/ shivering/
goose pimples/ animals become more active
Kavungya answered the question on June 17, 2019 at 07:01
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Describe the path taken by urea from the organ where it is formed until it is released from
the human body
(Solved)
Describe the path taken by urea from the organ where it is formed until it is released from
the human body
Date posted:
June 17, 2019
.
Answers (1)
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In an investigation, two persons A and B drunk the same amount of glucose solution. Their blood
sugar levels were determined immediately and thereafter at intervals...
(Solved)
In an investigation, two persons A and B drunk the same amount of glucose solution. Their blood
sugar levels were determined immediately and thereafter at intervals of one hour for the next six
hours.
The results were as shown in the following table
(a) Explain each of the following observations;-
(i) Blood sugar level increased in person A between 0 and 1 hour
(ii) The blood sugar level dropped in person A between 1 and 4 hours
(b) From the graph, what is the normal blood glucose sugar level for human beings
(c) Suggest a reason for the high sugar level in person B
(d) How can the high blood sugar level in person B controlled?
(e) What is the biological significance of maintaining a relatively constant sugar level in a human
being
(f) Account for the decrease in the blood glucose level of person B after 4 hours
Date posted:
June 17, 2019
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Answers (1)
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Study the diagram below and answer the questions that follow
(a) Name the structure represented by the diagram
(b) (i) Name the parts labelled D and M
(ii)...
(Solved)
Study the diagram below and answer the questions that follow
(a) Name the structure represented by the diagram
(b) (i) Name the parts labelled D and M
(ii) Name the hormones whose sites of action are Q and G (c) Name one substance that is present in part N but absent in part Z
(d) The contents of part V were boiled with Benedicts’ solution and an orange precipitate was
formed. Account for the results
Date posted:
June 17, 2019
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Answers (1)
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Explain the significance of the flow system in the nephron where the glomerular filtrate
flows in opposite direction to that of blood in the surrounding capillaries
(Solved)
Explain the significance of the flow system in the nephron where the glomerular filtrate
flows in opposite direction to that of blood in the surrounding capillaries
Date posted:
June 17, 2019
.
Answers (1)
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Kosgei and Onyancha collided during a football match and each got bruised. Kosgei’s bruise stopped bleeding after ten minutes while Onyancha’s bruise continued bleeding and...
(Solved)
Kosgei and Onyancha collided during a football match and each got bruised. Kosgei’s bruise stopped bleeding after ten minutes while Onyancha’s bruise continued bleeding and he had
to be taken to hospital for treatment.
(a) Explain the process which brought about stoppage of Kosgei’s bleeding
(b) Distinguish between blood clotting and haemagglutination.
(c) Name the disease, that Onyancha could be suffering from.
Date posted:
June 17, 2019
.
Answers (1)
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The equation below represents a metabolic process that occurs in a certain organ in the m
mammalian body:-
Ammonia (enzymes)----> Organic compound Q + water +
Carbon...
(Solved)
The equation below represents a metabolic process that occurs in a certain organ in the m
mammalian body:-
Ammonia (enzymes)----> Organic compound Q + water +
Carbon (IV) oxide
a) Name the process represented in the equation.
b) Name the organ in which the process occurs.
c) Why is the process important to the mammal?
d) Identify the organic compound Q.
e) Explain the source of ammonia in the organ named in (b) above.
f) What happens to organic compound Q?
Date posted:
June 17, 2019
.
Answers (1)
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Distinguish between internal environment and external environment
(Solved)
Distinguish between internal environment and external environment
Date posted:
June 17, 2019
.
Answers (1)
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State two classes of phylum chordata where all members are poikilothermic .
(Solved)
State two classes of phylum chordata where all members are poikilothermic .
Date posted:
June 17, 2019
.
Answers (1)
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What is poikilotherm?
(Solved)
What is poikilotherm?
Date posted:
June 17, 2019
.
Answers (1)
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The diagram below shows simplified structures of kidneys from two different animals.
(a) Suggest possible habitat in which animal N is found.
(b) Give two reasons for...
(Solved)
The diagram below shows simplified structures of kidneys from two different animals.
(a) Suggest possible habitat in which animal N is found.
(b) Give two reasons for your answer in (a) above.
Date posted:
June 17, 2019
.
Answers (1)
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Explain the effects of the following on the quantity and composition of urine
(a) Drinking large amount of clean water
(b) Drinking very salty soup
(c) Removal of...
(Solved)
Explain the effects of the following on the quantity and composition of urine
(a) Drinking large amount of clean water
(b) Drinking very salty soup
(c) Removal of pancreas
Date posted:
June 17, 2019
.
Answers (1)
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The table below shows a description of size of glomeruli and renal tubules of two animals
which are adapted to living in different environment:-
a) Name the...
(Solved)
The table below shows a description of size of glomeruli and renal tubules of two animals
which are adapted to living in different environment:-
a) Name the likely environment in which animal A lives
b) Suggest the main nitrogenous waste produced by animal B
c) Name the organelle of osmoregulation in each of the following animal: i) Paramecium
ii) Insects
Date posted:
June 17, 2019
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Answers (1)
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State two features in the nephron that facilitate ultrafiltration
(Solved)
State two features in the nephron that facilitate ultrafiltration.
Date posted:
June 17, 2019
.
Answers (1)
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A patient was complaining of thirst most of the times. A sample of the patient’s urine was found
not to contain a lot of sugar but...
(Solved)
A patient was complaining of thirst most of the times. A sample of the patient’s urine was found
not to contain a lot of sugar but was dilute:-
(a) Name the hormone the person’s body was deficient of
(b) Which gland produces the above hormone
(c) Name the disease that the patient was most likely suffering from
Date posted:
June 17, 2019
.
Answers (1)
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Study the homeostatic scheme below:
(a) Identify the hormone labeled A
(b) Name the site of action of hormone A
(c) Identify the feedback labeled D
(Solved)
Study the homeostatic scheme below:
(a) Identify the hormone labeled A
(b) Name the site of action of hormone A
(c) Identify the feedback labeled D
Date posted:
June 17, 2019
.
Answers (1)
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The figure below shows a vertical section through a mammalian kidney.
(a) Label the parts A and B
(b) Which part is the Bowman’s capsule found?
(Solved)
The figure below shows a vertical section through a mammalian kidney.
(a) Label the parts A and B
(b) Which part is the Bowman’s capsule found?
Date posted:
June 17, 2019
.
Answers (1)
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State two processes through which plants excrete their metabolic wastes.
(Solved)
State two processes through which plants excrete their metabolic wastes.
Date posted:
June 17, 2019
.
Answers (1)
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The table below shows the approximate percentage concentration of various components in blood
plasma entering the kidney, glomerular filtrate and urine of a healthy human being
(a)...
(Solved)
The table below shows the approximate percentage concentration of various components in blood
plasma entering the kidney, glomerular filtrate and urine of a healthy human being
(a) Name the process responsible for the formation of glomerular filtrate
(b) What process is responsible for the absence of glucose and amino acids in urine?
(c) Explain why there are no plasma proteins in the glomerular filtrate?
Date posted:
June 17, 2019
.
Answers (1)
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The table below shows description of sizes of glomeruli renal tubules of two animals which are
living in different environments
Name the likely environment in which each...
(Solved)
The table below shows description of sizes of glomeruli renal tubules of two animals which are
living in different environments
Name the likely environment in which each animal lives :
(i)Animal X
(ii) Animal Y
Date posted:
June 17, 2019
.
Answers (1)
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What role does vasoconstriction play in thermoregulation?
(Solved)
What role does vasoconstriction play in thermoregulation?
Date posted:
June 17, 2019
.
Answers (1)