Lesson 32: Kidney-an excretory organ

This is not in the syllabus for the Science Biology students but you are welcome to go beyond that. Of course the Pure Biology students know that Kidney and its excretory functions are an important part of their syllabus.
This set of powerpoints slides are very good in enhancing your understanding of this topic. It covers details of the following:

• definition of the term excretion
• urinary system, annotated diagram
  
• kidney, L.S., annotated diagram
  
• nephron, annotated diagram
• step by step, urine formation, annotated
• quiz
  

The Kidney

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Lesson 31: Circulatory and Respiratory systems

Hi,

This set of powerpoint slides covers two chapters. They slides are clear and useful in understanding difficult concepts such as how skeletal muscles move blood upwards (against gravity) in the vein.

Here is a list of salient points to look out for in this lesson:

• parts of the circulatory system
• heart structure and the path of blood flow within it
• how the heart functions as a double pump
• functions of the systemic and pulmonary circulations
• how the kidney is involved in regulating the volume of blood and blood pressure
• the components of blood and their functions
• definition of respiration
• cellular respiration and breathing/gaseous exchange between lungs and the environment
• parts of the human respiratory system
• breathing mechanism
• components of cigarette smoke and the harmful effects of these components

Lymphatic system and its functions are not in our syllabus.

Functions of the brain in regulating the breathing rate is also taken out of our syllabus. However, the effect of increased carbon dioxide concentration in blood triggering increase in breathing rate is very much in our syllabus.

Chapter 37 lecture- Circulatory & respiratory

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Lesson 30: Biological catalysts-enzymes

Hi,

These Powerpoint slides make learning key concepts easy.
The coverage includes the following:

• definition of catalyst
• definition of enzyme
• what is active site
• lock and key hypothesis
• synthesis and hydrolysis type of enzyme reactions
• what is denaturing of enzyme

Cells And Enzymes

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Lesson 29: Organic molecules are produced by plants and animals

Hi,

This set of powerpoint slides cover more on organic molecules in organisms.

• the polar nature of water molecule giving rise to many uses and properties in organisms
• high heat capacity, high latent heat of vaporisation, solubility, capillary action and transpiration pull in xylem vessels
• magnesium ions in plants for making chlorophyll
  
• nitrate ions in plants for making amino acids from glucose
• uses of carbohydrates, mono-, di- and polysaccharides
  
• uses of lipids in body and their structures
  
• uses of proteins in body and their structures

The detailed chemical structures of the many types of carbohydrates, fats and proteins are not in the syllabus.

Chapter 3 Biological Molecules

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Lesson 28: Homeostasis - maintaining a constant internal environment

Hi,
This is an important part of the pure biology syllabus.

This set of slides cover the following points to remember for exams:

• definition of homoeostasis
  
• water, salt, blood sugar, body temperature, controls
• kidney, skin involvement in homoeostasis
  
• urinary system, labels, annotations
• kidney, labels, annotations
• nephron labels, annotations
  
• nephron, in detail, how it works
• glomerulus, convoluted tubules, loop of Henle, collecting ducts
  
• kidney dialysis in detail
• anti diuretic hormone, how it controls volume of urine and blood pressure
• skin, labels, annotations
• responses to temperature
  
• vaso dilation, constrictions, hair erector muscles, sweat glands involvement in homoeostasis
  
• quiz, short questions
  

Unit 6 Human Homeostasis

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Lesson 27: Sense organs

Hi,

More on the nervous system and the eye. Please remember that only the eye and skin are in the syllabus now. The other sense organs are still very interesting, but they will not be tested in the exams.

This set of slides contain the following:

• sense organs eye and skin, and nervous system and reflex actions
• stimulus, receptor, coordination, effector, response sequences
• nerve cell, labels, annotation
• how synapse works
• pupil reflex, blink reflex, cough reflex
• labels in reflex actions, annotated diagram
  
• eye, labels, annotations
• compare eye with camera in its functions
• short and long-sightedness
  
• short questions
  

Remember not to dwell too much on the ear, tongue, nose, other parts which will not be tested in your examinations.

Unit 5 Nervous System And The Senses

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Lesson 26: Coronary heart disease and heart attacks

Hi,

Coronary heart disease may lead to heart attacks. Find out how.
The powerpoint slides explain the following:

• coronary heart disease is caused by fatty deposits or plaque in coronary arteries
• causes of coronary heart disease
• how blot clot occurs in coronary arteries
• atherosclerosis, plague narrowing of arteries in body
• ballooning technique
• vascular stent
• coronary artery bypass, vein grafts from aorta to the coronary artery

Coronary Artery Disease (CAD)

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