nervous system and synaptic transmission

Question 1

Divisions of the nervous system

Answer 1

-the central nervous system consists of the brain and spinal cord
-somatic nervous system controls voluntary movements

Question 2

The somatic nervous system…

Answer 2

Comprises of two sub systems

Question 3

Which response results from the action of the sympathetic division of the autonomic nervous system?

Answer 3

Increased heart rate

Question 4

Sensory neurons carry information…

Answer 4

Towards the brain

Question 5

Describe two or more functions of the peripheral nervous system?

Answer 5

-sensory function - receives information from body + sends to CNS
-motor function - carries commands from the CNS to muscles and glands

Question 6

describe the structure and function of a neuron?

Answer 6

-sensory neuron - detect information from your senses (cell body,dendrites,axon-pass on information onto the CNS)
-relay neuron- only found in the CNS and visual system (axon is much shorter allowing sensory + motor neurons to communicate with eachother)
-motor neuron - allow muscle contractions (axon is very long, up to 1 metre)

Question 7

one difference between the autonomic nervous system and the somatic nervous system?

Answer 7

-autonomic- involuntary movements
-somatic-voluntary movements

Question 8

Outline role of the sympathetic nervous system

Answer 8

-essential for our ability to respond quickly to potential threats
-fight or flight

Question 9

What is the process of synaptic transmission?

Question 10

Why can information only travel in one direction at the synapse?

Answer 10

-receptors are only found on the post synaptic neuron
-diffusion travel from high to low concentration