Mod3-Obj7: Neural pathways

Question 1

Sensory pathways

Answer 1

Relay sensory input from the receptor to the brain

-Conduct specific sensory input, to a specific brain destination at a specific conduction speed

Question 2

Sensory pathways are multi-neuron pathways and usually involve

Answer 2

1. ) A sensory neuron of the PNS

2. ) Two interneurons of the CNS

Question 3

The Central Nervous System

Answer 3

Integration primarily occurs in the brain

Question 4

Motor areas of the brain decide on and…

Answer 4

initiate a motor response

Question 5

Sensory areas of the brain…

Answer 5

Receive, process and interpret incoming sensory input

Question 6

The ability to consciously perceive a stimulus depends on sensory input reaching the…

Answer 6

Cerebral cortex of the brain

Question 7

E.g.) Pain

Answer 7

• Perceive a stimulus
• Determine the intensity of a stimulus
• Identify the location of a stimulus
• Discriminate qualities of a stimulus
• Integrate various stimuli to identify all aspects of a sensation
• Communicate with the motor centres of the brain

Question 8

Motor areas of the brain

Answer 8

Determine, generate and issue:

• Somatic motor output that results in controlled voluntary skeletal muscle movements
• Autonomic motor output that controls glands, cardiac and smooth muscles

Question 9

Motor pathways

Answer 9

Relay motor output from motor centres in the brain to an effector muscle or gland

Question 10

Motor pathways are multi-neuron pathways, involving:

Answer 10

1. ) An interneuron of the CNS

2. ) One or two motor neurons of the PNS

Question 11

Motor pathways include 3 basic motor pathways

Answer 11

1. ) Somatic motor pathways
2. ) Autonomic motor pathways
3. ) Reflex arcs

Question 12

Somatic motor pathways

Answer 12

Relay motor output from the primary motor cortex of the cerebrum to an effector skeletal muscle
-Control voluntary skeletal muscle movements

Question 13

Autonomic motor pathways

Answer 13

Relay motor output from the hypothalamus to an effector gland, cardiac or smooth muscle
-Control involuntary cardiac and smooth muscle movements and glandular secretion