Nervous and Endocrine System

Question 1

Neurons: Three Basic Parts

Answer 1

• Cell Body = contains all necessary cell components including nucleus
• Axon = carries nerve impulse or AP along length of the cell. Some covered in myelin (insulating = speed). Terminal contains synapses (junction)
• Dendrites = small, branch-like, make connections to other cells, “talking” to other cells

Question 2

Central Nervous System (CNS)

Answer 2

Brain and spinal cord.

Question 3

Peripheral Nervous System (PNS): Somatic Nervous System (SNS)

Answer 3

Controls skeletal muscle - things we voluntarily control.

Question 4

Peripheral Nervous System (PNS): Autonomic Nervous System (ANS)

Answer 4

Control our involuntary activities via glands and organs. Divided into three parts.

Question 5

ANS: Sympathetic, Parasympathetic, and ENS

Answer 5

S: fight or flight - controls short-lived behaviour e.g. increased HR, respiration rate, etc.
P: rest and restore - maintains stable body functioning in normal conditions.
ENS: meshwork of nerve fibres that innervate the viscera (GI tract, pancreas, gall bladder).