Chapter 3: The Nervous System

Question 1

Nerves:

Answer 1

Lots of neurons that are connected with each other.

Question 2

Nervous system:

Answer 2

Lots of nerves that are connected with each other.

Question 3

Nervous system (divided into 2):
→ Central nervous system (1) (brain and spinal cord)
→ Peripheral nervous system (2: divided into 2)
→→ Somatic (2.1)
→→ Autonomic (2.2: Divided into 2)
→→→Sympathetic (2.2.1)
→→→Parasympathetic (2.2.2.)

Answer 3

Nervous system (divided into 2):
→ Central nervous system (1) (brain and spinal cord)
→ Peripheral nervous system (2)
→→ Somatic (2.1)
→→ Autonomic (2.2)
→→→Sympathetic (2.2.1)
→→→Parasympathetic (2.2.2.)

Question 4

Central nervous system (1) :

Answer 4

Brain and spinal cord
Receives sensory information from the outside world, processes the information, and sends commands to the skeletal (bones) and muscular systems for actions.

Brain processes sensory info and sends commands to skeletal and muscular systems for actions.

Question 5

Peripheral nervous system (2) :

Answer 5

Allows the brain and spinal cord to receive sensory information and to send information to other areas of the body for movement.

Connects the central nervous system with the rest of the body

Question 6

Peripheral nervous system: Somatic (2.1):
Includes sensory neurons:
Includes motor neurons:

Answer 6

A set of nerves (neurons) that sends information from the central nervous system to voluntary muscles for conscious actions

Voluntary controls.

Coordinates humans’ conscious behaviours.

Includes sensory neurons (inputs): That relay information about pressure, temperature, pain, proprioception, and interoception.

Includes motor neurons (outputs): Sends information to skeletal muscles

Question 7

Peripheral nervous system: Autonomic (2.2):

Answer 7

A set of nerves that carries involuntary and automatic commands.

Unconscious control of the body’s organs.

Question 8

Peripheral nervous system: Autonomic: Sympathetic (2.2.1):

Answer 8

A set of nerves that prepares the body for action in threatening situations.

Question 9

Peripheral nervous system: Autonomic: Parasympathetic:

Answer 9

A set of nerves that returns the body to a normal resting state.

Question 10

Evolution of the nervous system:

Answer 10

Simple collections of sensory and motor neurons to a complex nervous system.
Process of refining, and expanding structures.
Evolved more than other species to adapt to more complex environments.

Question 11

Nervous system:

Answer 11

Gathering sensory information from external stimuli, processes that information, and responds to those stimuli.