Nervous System Functions Sensory input sensory receptors monitor

Nervous System

Functions • Sensory input - sensory receptors monitor changes occurring inside and outside the body • Integration – processes sensory input and decides what to do • Motor output – the response

Neurons (Nerve Cells) • They have extreme longevity (can function for >100 years) • They are amitotic (do not divide) • High metabolic rate – needs a lot of oxygen and glucose

The impulse travels from the dendrite end to the synapse

Protein gates and pumps in the cell membrane control the movement and concentration of Na and K ions to carry an impulse from one end of the neuron to the other.

Neurotransmitters carry the impulse from one neuron to the next across a gap called the synapse

Neurotransmitters & Personality

http: //99 u. com/videos/20272/simon-sinekwhy-leaders-eat-last

PNS – Peripheral Nervous System

Sensory Nerves vs. Motor Nerves

What we would look like if our body parts were proportional to the number of sensory nerves connected to these areas.

Somatic Nerves – Control voluntary actions (Muscle movement)

Autonomic Nerves – Control involuntary action (organ control) Parasympathetic Response (Rest & Digest) Sympathetic Response (Fight or Flight)

CNS – Central Nervous System

The Spinal Cord Connects the brain with the nerves of the body

The Human Brain Parietal Lobe (Cerebrum) Thalamus Occipital Lobe (Cerebrum) Cerebellum Ventricle Corpus Collosum Frontal Lobe (Cerebrum) Pons Medulla oblongata Hypothalamus Pituitary Gland Temporal Lobe (Cerebrum) Midbrain

Lobes of the cerebrum

Anatomy & Physiology of Human Brain https: //www. youtube. com/watch? v=k. MKc 8 nf PATI 14 min.

Compare the ridges (gyri) & grooves (sulci) of various vertebrate brains What differences do you notice?

Grey Matter – not mylenated White Matter - mylenated

Human Brain – How Does It Work? https: //www. youtube. com/watch? v=l. Imv. Vcc. P CRw 1. 5 hours

Comparison of Human and Sheep Brains