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Nutrition in Plants

In our Biology class we had been studying the nutrition in plants. Here are the topics seen in nutrition of plants:

  • Leaf structure: external and internal; and
  • Photosynthesis

Here is a video showing the main characteristics of photosynthesis.

Reproduction in Plants

In our Biology class we had been studying the reproduction in plants. Here is a presentation showing some characteristics.

Homeostasis: Control of blood sugar levels

In our Biology class we have been studying homeostasis and the control of the body temperature. After that we started learning about the control of our blood sugar levels and we were assigned to do an activity.

1b.

Homeostasis-Controlling-blood-sugar-levels

1c. Negative feedback: way in which the hypothalamus, skin and muscles work together to keep your internal body sugar levels in blood constant.

2. a.

Diabetes Type 1 Diabetes Type 2
Causes Death of cells that secrete insulin Cells stop responding properly to insulin, obesity, lack of exercise.
Treatment Daily injections of insulin to reduce blood glucose concentration, eat regularly, manage the diet, exercise carefully to balance their energy needs with the food and insulin intake Eating a balanced diet, exercising regularly, losing weight.

 

2c. Genetic engineering: taking a gene from one species and putting it into another species.

DNA

In our Biology class we have seen a new topic: DNA. To learn some of the characteristics of DNA we watched a presentation that our teacher, Male Ravagnan, made. Here is the presentation.

Drugs Presentation: Cannabis

In our Biology class we had been studying the different types of drugs. After knowing all of their characteristics, our teacher told us to make some presentations about them. I worked with Luli Giambruni, Luz Garcia Fernandez and Bauti Olaizola; and the type of drug we made the presentation was Cannabis. Here is the presentation.

Click here for larger version

The Endocryne System

In our Biology class we have been studying the Endocryne System. After learning some of its characteristics, we were asked to answer some questions in groups. I worked with Juan Lutowicz.

  1. Hormone: is a chemical substance produced by a gland, carried by the blood, which alters the activity of one or more specific target organs and is then destroyed by the liver.
  2. Glands which secrete hormones in the human body:

Endocryne System - Biology

3. Adrenaline makes your heart beat faster, supplying oxygen to your brain and muscles more quickly. This gives them more energy for fighting or for running away. It also increases the breathing rate, so that more oxygen can enter the blood in the lungs. It also causes pupils to widen, which allows more light into the eye and so we can se clearer.

The Eye as a Sense Organ: Pupil Reflex

In our Biology class we have been studying how the Nervous System works. We had seen that in the Nervous System are sense organs such as the eye. After knowing that, our teacher told us to make an activity on her blog about the pupil reflex in the eye. I work with Juan Lutowicz.

  1. Search in the internet a short video about pupil reflex.

2. Draw a flow chart explaining the reflex (stimulus, receptors, coordinator, effectors, effect and response).

Pupil Reflex

Nervous System

In our Biology class  we had started to see the “Nervous System”. In class our teacher told to read some pages that she gave us and then to complete some activities.

BBC Bitesize and Intel Education Resources.

Activities

1a) A. Lesson introduction; B. Your control centre – The key parts; C. The receptors; D. The neurones – Nerve cells; E. Different types of neurones; F. Progress question; G. The Central Nervous System; H. Progress question; I. The Nervous Pathway; J.  Example of a Nervous Pathway; and K. Progress question.

1b) Relay Neuron: The nerve cell that transmits electrical impulses from sensory neurones to motor neurones. Image.

Sensory Neuron: The nerve cell that transmits electrical impulses from receptors in the sense organs to the CNS. Image.

Motor Neuron: The nerve cell that carries electrical impulses from the CNS to effectors such as muscles or glands. Image.

1c) This is a diagram showing the Reflex Arc. Diagram.

1d) The following video is a short explanation about how the Synapse works.

Gas Exchange

In our class of Biology we have been studying the gas exchange. After learning some its characteristics, we have made a chart. Here it is.

  Inspired Air Expired Air  
Oxygen 21% 16% Respiration (Raw materials)
Carbon Dioxide 0.04% 4% Respiration (Waste products)
Water Vapour

(Humidity)

Variable Always hight

(100%)

Depends on the environment or atmosphere
Temperature Variable Always warm Mucus
Dust Variable Few, or no dust Ciliated cells

Cellular respiration

In our biology class we have studied the “Cellular Respiration” and its functions. Here is an activity that our teacher told us to make in pairs. I work wit Juan Lutowicz.

 1 – State the uses of energy in our body.

  • It contracts the muscles, so we can move our parts of the body;
  • It is used in reactions that produce different molecules;
  • It is used to build up larger molecules from smaller ones;
  • It is used to transmit nerves impulses.

2 – Construct a mind map about respiration. You may do it on a sheet of paper or use any of the tools available such as bubble.us

You should include:

a- Definitions;

b- Types: Aerobic and anaerobic (in muscles and yeast);

c- Equation in words;

d- Amount of energy released

3 – Explain the meaning of “oxygen debt”

Anaerobic respiration produces an “Oxygen debt”. This is the amount of oxygen needed to oxidise lactic acid to carbon dioxide and water. The existence of an oxygen debt explains why we continue to breathe deeply and quickly for a while after exercise.

 4- Search in the internet a short video, which explains why the breathing rate does not return to normal immediately after vigorous exercise stops.