Lesson 1- Division of the Nervous System- Central & Peripheral

Question 1

What is the Central Nervous System?

Answer 1

• Consists of 🧠 & spinal chord
• allows 🧠 to receive info from sensory receptors (👀 ,👂etc) and gives ability to send messages to muscles 💪 and glands in response

Question 2

What is the role/function of the CNS?

Answer 2

1) Control of 🏃‍♂️

2) Regulation of body’s physiological processes

Question 3

What are the 4 main areas of the brain & what are the functions of each?

Answer 3

1) Cerebrum- largest part of 🧠- interprets touch, 👀, 👂, speech 👄, emotions 😡 & learning 📚- contains 4 lobes- split into 2 hemispheres
2) Cerebellum- responsible for motor skills, balance and coordination of muscles 💪 to allow precise movement
3) Diencephalon- contains thalamus (regulates consciousness, 💤 and alertness) and hypothalamus (regulates body temperature 🤒, stress response, hunger 🍎 and thirst 💧)
4) 🧠 stem- regulates breathing and❤️ rate

Question 4

What is the role/function of the spinal chord?

Answer 4

Spinal chord- extension of 🧠- facilitates transfer of messages to and from the 🧠 to the PNS (rest of the body)
- allows 🧠 to monitor and regulate bodily processes e.g. digestion, breathing and voluntary movement

Question 5

What is the Peripheral Nervous 😥 System?

Answer 5

Consists of nervous 😥 system throughout rest of body

Transmits messages via neurons (nerve cells) to and from CNS

Question 6

What is the peripheral nervous system split into?

Answer 6

1) Somatic 😥 System (SNS)

2) Autonomic 😥 System (ANS)

Question 7

What are the key roles of the somatic nervous system?

Answer 7

Carries info from motor cortex in 🧠 (SNS controlled by motor cortex)
Involves info from sensory AND motor pathways
Controls skeletal muscles
Voluntary movements (conscious control)
Transmits and receives messages from receptor cells in sensory organs (e.g. 👂, 👀 etc) and relays these messages to 🧠

Question 8

What are the key roles of the autonomic nervous system?

Answer 8

Transmits and revives messages from internal organs and glands
Controlled by 🧠 stem
Involuntary (✖️ under conscious control) response for automatic and unconscious actions such as❤️ rate and digestion
ONLY has motor pathways

Question 9

What is the autonomic nervous system split into?

Answer 9

1) Sympathetic 😥 System (SNS 2)

2) Parasympathetic 😥 System (PNS 2)

Question 10

What are the key roles of the sympathetic nervous system?

Answer 10

⬆️ activity- activated when person is stressed 😥

❤️ rate & breathing ⬆️, digestion stops, salivation ⬇️, 👁 dilate, 🥊/🛩 response begins

Question 11

What are the key roles of the parasympathetic nervous system?

Answer 11

⬇️ activity- relaxing 😎- conserving energy

❤️ rate & breathing ⬇️, digestion starts, salivation ⬆️, 👁 constrict, body relaxes