part 4

Question 1

how are synapses formed

Answer 1

formed by the membranes of a presynaptic neuron and a postsynaptic neuron which may be separated by a synaptic cleft(chem synapse)

Question 2

how does transmission of nerve impulse take place

Answer 2

when the impulse reaches the terminal inside the synaptic knob, there are synaptic vesicles. there are Ca+ outside which comes in and takes the synaptic vesicles till the end causing exocytosis.(chem synapse)

Question 3

what does synaptic vesicles contain

Answer 3

they have certain chemicals inside them called neurotransmitters(chem synapse)

Question 4

electrical synapse

Answer 4

faster than chemical synapse. the membranes lie close to each other.

Question 5

structure of our human brain

Answer 5

inside the skull, the brain is covered by cranial meninges consisting of an outer layer : 1. Dura mater

2. Arachnoid(middle layer)
3. Pia mater(innermost layer)

Question 6

brain is divided into 3 parts what are their names?

Answer 6

1. Forebrain
2. Midbrain
3. Hindbrain

Question 7

forebrain is divided into 3 parts what their names?

Answer 7

1. Cerebrum
2. Thalamus
3. Hypothalamus

Question 8

Cerebrum has two sides

Answer 8

Left cerebral hemisphere and right cerebral hemisphere which stays connected by a nerve fibre called corpus collosum