The Nervous System

Question 1

What are hormones?

Answer 1

Chemical messengers that travel in your blood.

Question 2

What are the steps involved in a nervous response for picking up a book?

Answer 2

1) Photoreceptors in eye pick up stimulus (seeing the book) and send electrical impulses along your sensory neurons to your CNS.
2) Electrical impulses them pass on from the motor neuron to effector (Muscles to pick up book).

Question 3

Whats a synapse?

Answer 3

The gap between 2 neurons.

Question 4

Whats a neurotransmitter?

Answer 4

A chemical that diffuses across the synapse and binds to post synaptic membrane.

Question 5

What happens in a reflex arc?

Answer 5

Sensory neuron sends electrical impulses to a relay neuron, which is located in the spinal cord of the CNS. Relay neurons connect sensory neurons to motor neurons. Motor neuron sends electrical impulses to an effector. Effector produces a response (muscle contracts to move hand away).