B12 The Netvous System And Homeostasis

Question 1

Function of the nervous system?

Answer 1

Enables organisms to react to their surroundings and coordinates behaviour

Question 2

Two parts of the central nervous system?

Answer 2

Brain 🧠 and spinal cord

Question 3

Y r reflex actions important?

Answer 3

For survival and to prevent damage to the body

Question 4

Y r reflex actions rapid and automatic?

Answer 4

They do not involve the conscious part of the brain 🧠

Question 5

Give the pathway of a nervous response

Answer 5

Stimulus➡️receptor➡️coordinator➡️effeffector➡️response

Question 6

Stimulus?

Answer 6

A change in the internal or external environment ♻️

Question 7

Synapse?

Answer 7

Junction between two neurons where chemicals are released, allowing impulses to cross 🚷

Question 8

Function of neurons?

Answer 8

Carry electrical impulses around the body

Question 9

Homeostasis?

Answer 9

Maintenance of a constant internal environment

Question 10

Y is homeostasis important?

Answer 10

Maintains optimal conditions for cell and organ function, and enzyme activity

Question 11

Give 3️⃣ internal conditions controlled in homeostasis

Answer 11

Body temp
Blood glucose concentration
Water levels

Question 12

Give three things all control systems include

Answer 12

Receptors
Coordination centres
Effectors

Question 13

Name three coordination centres

Answer 13

Brain 🧠
Spinal cord
Pancreas

Question 14

Name two types of effectors

Answer 14

Muscles and glands