nervous system

Question 1

Stimulus

Answer 1

A physical or chemical change in the environment that requires a response from the organism.

Question 2

Meninges:

Answer 2

The three protective membranes that surround the brain and spinal cord

Question 3

Reflex action

Answer 3

quick, involuntary, automatic action that involves the spinal cord and does NOT involve the brain

Question 4

Reflex arc

Answer 4

The pathway a reflex action follows in order to bring about a reflex action.

Question 5

Synapse

Answer 5

A gap between two consecutive neurons or between a neuron and an effector.

Question 6

Neurotransmitter

Answer 6

A chemical substance that enable an electrical impulse to flow smoothly between consecutive neurons. (eg. Acetylcholine)

Question 7

Receptor:

Answer 7

an organ that detects the stimulus and converts it into an impulse

Question 8

Effector:

Answer 8

an organ or gland that receives the impulse from the CNS and carries out the appropriate response.

Question 9

brain

Answer 9

The brain is the enlarged upper part of the spinal cord, protected by a bony cranium, cerebrospinal fluid and three membranes called meninges

Question 10

dura mater

Answer 10

outermost membrane

Question 11

arachnoid mater

Answer 11

middle membrane