TOPIC: Endocrine System Aim: Explain the function and makeup of the endocrine system. Do Now: Practice Questions HW: Ditto – Nervous System Review (last.

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Presentation transcript:

TOPIC: Endocrine System Aim: Explain the function and makeup of the endocrine system. Do Now: Practice Questions HW: Ditto – Nervous System Review (last page of NS packet)

Review: 1.Explain the difference between the CNS and the PNS. 2.What kind of neurons makeup the CNS? 3.What kind of neurons makeup the PNS? 4.Identify the part of the brain being described: 1.Controls heart rate 2.Regulates balance 3.Controls memory 4.Regulates breathing rate 5.Controls thinking 6.Controls balance

A B C

Review: Put the following structures in order starting with where the impulse begins and where it ends. Motor neurons Receptors Interneurons Effectors Sensory Neurons

Function of the Endocrine System Regulate all body processes Release hormones (chemicals) into the BLOOD –Affect activities of other cells

Endocrine glands Release hormones

What is a hormone? Chemicals that affect activities of other cells (TARGET CELLS)

What is a target cell? Cells hormones travel to Have receptors for specific hormones

No receptor  no effect

Review: 1.What is the name of the chemical secreted by endocrine glands? 2.What are the cells that are affected by hormones called? 3.What do hormones attach to on the surface of the cell? 4.How much of a hormone is needed?

s/nervoussystem/ s/neurons/ s/brain/

A B C

DID YOU KNOW? There are approximately 100 billion neurons in the human brain. The average brain weighs about 3 pounds.

DID YOU KNOW? There are about 3 million miles of axons in the human brain. The human brain has 100 trillion synaptic connections.

Did you know… The human brain alone consists of about a 100 billion neurons. If all these neurons were to be lined up, it would form a 600 mile long line. As we get older, the brain loses almost one gram per year. In humans, the right side of the brain controls the left side of the body, while the left side of the brain controls the right side.

There are about 13, 500,00 neurons in the human spinal cord. An average adult male brain weighs about 1375 grams. An average adult female brain is about 1275 grams. Only four percent of the brain's cells work while the remaining cells are kept in reserve.

Reasoning, planning, speech, movement, emotions, problem solving Receives info from skin Receives info from eyes Important for memory, receives info from ears