When body temperature rises above normal they dilate; when below normal they constrict (i.e. vasodilation/ vasoconstriction of arteries respectively)
johnmulu answered the question on May 5, 2017 at 06:08
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Give two reasons why animals have specialized organs for excretion as compared to plants
(Solved)
Give two reasons why animals have specialized organs for excretion as compared to plants
Date posted:
May 5, 2017
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Explain what happens in humans when concentration of glucose in the blood decreases below the normal level.
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Explain what happens in humans when concentration of glucose in the blood decreases below the normal level.
Date posted:
May 5, 2017
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Explain why plants do not require specialized excretory organs
(Solved)
Explain why plants do not require specialized excretory organs
Date posted:
May 5, 2017
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State one use of each of the following excretory products of plants. (a) colchicine (b) papain
(Solved)
State one use of each of the following excretory products of plants. (a) colchicine (b) papain
Date posted:
May 5, 2017
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(a) What is homeostasis?
(b) Name three processes in the human body in which homeostasis is involved.
(Solved)
(a) What is homeostasis?
(b) Name three processes in the human body in which homeostasis is involved.
Date posted:
May 5, 2017
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Answers (1)
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(a) Name a disease of the liver whose symptom is jaundice
(b) State the causative agent of: (i) cholera (ii) Candidiasis
(Solved)
(a) Name a disease of the liver whose symptom is jaundice
(b) State the causative agent of: (i) cholera (ii) Candidiasis
Date posted:
May 5, 2017
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Answers (1)
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State the importance of the following processes that takes place in the nephrons of a human kidney
(a) Ultra filtration (b) Selective reabsorption
(Solved)
State the importance of the following processes that takes place in the nephrons of a human kidney
(a) Ultra filtration (b) Selective reabsorption
Date posted:
May 5, 2017
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Answers (1)
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(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
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Answers (1)
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State the role insulin in human body.
(Solved)
State the role insulin in human body.
Date posted:
May 5, 2017
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(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
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Answers (1)
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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
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(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
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Answers (1)
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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)