Overview of the Nervous System

Question 1

Describe the three main activities of the nervous system that are used to receive and communicate information

Answer 1

1) Sensation or receiving info-detects changes in the internal and external environment
2) Integration of the info into a single picture- combines info to form a conscious picture or an unconscious overview about the situation
3) reaction to the info by eliciting a response (or reflex)- induces a change in response to the integrated sensory signals

Question 2

CNS

Answer 2

consists of the brain and spinal cord. responds to outgoing commands and receives and integrates sensory signals

Question 3

PNS

Answer 3

consists of sensory receptors & nerves transmits information between the CNS & periphery& detects internal & external environmental change

Question 4

Regions of the brain

Answer 4

1)Brainstem- the most caudal part of the brain which merges with the spinal cord
2)Cerebellum- sitting dorsal to the brainstem
3)Diencephalon- cranial to branching from the brainstem
4) Cerebrum- sitting cranial and dorsal to the diencephalon

Question 5

PNS autonomic division/nervous system

Answer 5

operate automatically & unconsciously. it receives signals from internal organs & effect change by sending outgoing signals to cardiac muscle, smooth muscles,& glands

Question 6

PNS somatic division/ nervous system

Answer 6

operates voluntarily & consciously. It receives signals from special senses as well as receptors in body tissues that monitor changes as touch and temperature