Introduction to Neural Communication

Question 1

Internal / external

Answer 1

-infection
-blood glucose concentration
-internal temperature
-water potential
-cell pH

-temperature
-light intensity
-humidity
-new/sudden sound

Question 2

Why is coordination needed?

Answer 2

-perform specific functions
-few body systems can work in isolation

Question 3

Cell signalling

Answer 3

One cell releases a chemical which has an effect on another

Question 4

Cells can…

Answer 4

… transfer signals locally
…transfer signals across larger distances

Question 5

Homeostasis

Answer 5

the maintenance of relatively constant conditions in the body

Question 6

Describe nervous system

Answer 6

Fast, short lived and localised

Question 7

Nervous system divides into

Answer 7

CNS (brain and spinal cord) and PNS (peripheral nerves which link CNS to body’s receptors and effectors)

Question 8

PNS divides into SNS and ANS

Answer 8

SNS (conscious)
ANS (unconscious)

Question 9

ANS divided into

Answer 9

Parasympathetic (rest and digest)acetylcholine
Sympathetic (fight or flight)noradrenaline

Question 10

Neurone definition

Answer 10

Are specialised cells that conduct electrical impulses within the nervous system

Question 11

Nerve

Answer 11

Is a bundle of fibres in body made up of number of neurones

Question 12

PNS

Answer 12

-sensory and motor
-electrical impulses to CNS

Question 13

Stimulus

Answer 13

A change in the internal/external environment

Question 14

Receptor

Answer 14

A sense organ detects a stimulus

Question 15

Coordinator

Answer 15

Formulates a suitable response to stimulus

Question 16

Effector

Answer 16

Produces a response

Question 17

Sensory receptors act as…

Answer 17

… transducers (convert energy of a stimulus into electrical energy)