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The diagram below illustrates the structure of the kidney nephron (a) Name the part labelled E. (b) How the part is labelled F adapted to its function?
State one economic importance of each of the following plant excretory products. (a) Tannin (b) Quinine (c) Caffeine (d) Cocaine (e)Papain
Name two kidney diseases
State the changes that occur in arterioles in the human skin during thermoregulation.
Give two reasons why animals have specialized organs for excretion as compared to plants
Explain what happens in humans when concentration of glucose in the blood decreases below the normal level.
Explain why plants do not require specialized excretory organs
State one use of each of the following excretory products of plants. (a) colchicine (b) papain
(a) What is homeostasis? (b) Name three processes in the human body in which homeostasis is involved.
(a) Name a disease of the liver whose symptom is jaundice (b) State the causative agent of: (i) cholera (ii) Candidiasis
State the importance of the following processes that takes place in the nephrons of a human kidney (a) Ultra filtration (b) Selective reabsorption
(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
State the role insulin in human body.
(a) Name the fluid that is produced by sebaceous glands (b) What is the role of sweat in human skin?
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.
(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
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
Adult elephants flap their ears twice as much as their calves in order to cool their bodies when is it hot. Explain.
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?
State the importance of osmo-regulation in organisms.
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.
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
State the economic importance of anaerobic respiration in plants.
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.
State two reasons why accumulation of lactic acids leads to an increase in heartbeat.
Name the three end products of anaerobic respiration in plants.
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.
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?
State two ways in which anaerobic respiration is applied in industries
How are the mitochondria adapted their functions?