Endocrine System

Nervous System

• Controls all of your body’s activities
• Responds to stimuli
• Maintains Homeostasis

Central Nervous System

• Consists of the Brain and Spinal cord

Major Parts of the Brain

Cerebrum

• Controls all voluntary movements memory, senses

Cerebellum

• Controls balance and coordination

Brain Stem

• Controls Involuntary actions

Peripheral Nervous System

• The Neurons located outside the central nervous system

Neurons

• Nerve cells.
• Job is to send and receive messages

 \n

Parts of the Neuron

Dendrites

• Receive the message and send it toward the Soma

Soma

• Cell Body

Axon

• Takes Information away from the cell

Terminal Axon

• End of neuron where signal is sent to next neuron

Synapse

• Gap between the Axon and Dendrite of Cell

Neurotransmitters

• Chemical that are sent between cells in synapse

 \n

 \n

Types of Nerves

Sensory Nerves

• Sense stimuli

Interneurons

• receive and relay signals from sensory and motor neurons

Motor Nerve

• Responsible for movement

 \n Reflex

• an automatic response to a stimulus by the spinal cord

The Endocrine System

• A group of glands that work together with the nervous system to coordinate all body functions

Hormones

• help regulate body functions

 \n Major Glands of the endocrine system

The Pituitary Gland

• The Master Gland controls all other glands

Hypothalamus

• Maintains body temperature

Pancreas

• Secretes the Hormone  insulin to lower blood sugar levels, Produces Glycogen to increase blood sugar levels

Thyroid

• Controls Metabolism

Adrenal Gland

• Produces adrenaline in a flight or fight response

Testes

• Produce Testosterone and secondary sex characteristics

Ovaries

• produce progesterone and secondary sex characteristics

 \n Homeostasis

• Maintaining a stable internal environment

Negative Feedback Systems

• help maintain homeostasis

Negative Feedback Loop

• result of a hormone decreases its own production