Human Reproductive System

Changes during puberty

Puberty



Read and then answer the test of your booklet

Organs of the female reproductive system

Fertilisation

Reproduction and pregnancy

Pregnancy

Stages of pregnancy

Birth

TEST

Ramón y Cajal. Structure and function of the nervous system.

It was his work that established the ‘neuron doctrine’ as the accepted model for the structure and function of the nervous system, and our modern understanding of the nervous system is founded on this doctrine.

He studied tissue from different regions of the brain and from the brains of various species of vertebrates. He discovered that, rather than being fused together in a continuous web (as had previously been thought), the cells that make up the nervous system are in fact discrete units, separate from one another.

Cajal’s discovery that nerve cells were independent required a new model for how the nervous system functioned. He proposed that electrical impulses were conducted through chains of nerve cells and that the direction of conduction is fixed. This is the ‘Law of Dynamic Polarization’, which states that impulses are conducted in a fixed direction through the neuron from dendrites, through the cell body, to the axon.

Cajal received many honours, including the Nobel Prize in Physiology or Medicine in 1906, and the Spanish government built the Cajal Institute, for neurobiological research, in his name.

Alexander Graham Bell

Alexander Graham Bell

Reading comprehension: Read and answer the questions.

--> Copy the 9 questions and the appropriate answers in your notebook.

Reading comprehension: read and answer the questions.


--> Copy the questions and the appropriate answers in your notebook.

Reading comprehension

--> True or false. Write the True sentences in your notebook.