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Body Systems that Regulate Body Functions. Nervous System. What is the function of the nervous system?. Overview of a vertebrate nervous system. Structure of a vertebrate neuron. What are the functions of: dendrites, axons, synapses?. The main parts of the human brain. Homeostasis.

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nervous system

Nervous System

What is the function of the nervous system?

structure of a vertebrate neuron
Structure of a vertebrate neuron

What are the functions of: dendrites, axons, synapses?

the main parts of the human brain
The main parts of the human brain

Homeostasis

Thinking,

memory,

learning

“Master Gland”

Balance,

Movement

Heart rate &

Breathing

slide6

Create a flow map to explain the series of events that happen from when you hear a loud noise to when you turn your head.

Receptors in ear receive sound information

REVIEW

hormones the endocrine system

Hormones & The Endocrine System

What is the function of the endocrine system?

definitions
Definitions
  • Hormones
    • Chemical messages
    • Regulate activity of other cells
    • Help maintain homeostasis
  • Endocrine glands
    • Secrete hormones
types of hormones
Types of Hormones
  • Protein hormones
    • Polar
    • Can they go through the cell membrane?
  • Steroid hormones
    • Made from cholesterol
    • Can they go through the cell membrane?
hormones are chemical signals
Hormones are Chemical Signals

How does a protein hormone regulate a cell?

How does a steroid hormone regulate a cell?

adrenal glands stress

Time for a yoga class?

Adrenal Glands & Stress
  • “Fight or Flight” – Immediate Stress
    • Epinephrine & Norepinephrine – hormones
    • Prepare body for emergency action
      • Increase heart rate
      • Increase blood glucose level
  • Long-term Stress
    • Cortisol & Aldosterone – hormones
    • Makes more energy available to body
    • Suppresses immune system
    • Increases blood pressure
slide15

Review

Create a Thinking Map of your choice to summarize what hormones do and how they work.

immune system

Immune System

What is the function of the immune system?

second line of defense
Second Line of Defense
  • Attacks invaders when they get in
  • Not specific – kills all cells that aren’t supposed to be there

Phagocytotic WBC

Fever

Inflammation

third line of defense
Third Line of Defense
  • Specific – attacks a specific invader (antigen)
    • Examples – cold, flu, measels
  • Antigens – cause a specific immune response
  • Made up of white blood cells (lymphocytes)
    • B cells
    • T cells
helper t cells
Helper T-Cells
  • A macrophage (phagocytotic WBC) eats an invader
  • It wears surface proteins of the bacteria
  • The Helper T-Cell that can fight this infection recognizes the surface protein
  • The Helper T-Cell organizes B Cells and Cytotoxic T-Cells
  • ** Helper T-Cells are Coordinators **
cytotoxic t cells
Cytotoxic T-Cells

Kill infected cells by causing them to lyse (pop open)

b cells
B Cells

Make antibodies;

Antibodies prevent invader from infecting new cells

Lock and key fit

(Invader)

memory immunity
Memory & Immunity

Antibodies and Memory Cells “remember” an infection so you only get sick once.

hiv attacks helper t cells
HIV attacks Helper T-Cells

Very low Helper T Cell

Can’t fight infections

vaccines
Cause immunity without sickness

Cause specific immune response; build up of antibodies

Examples

Killed microbes

Parts of microbes

Weakened microbes

Vaccines
review
Review

Think of an analogy to compare and contrast the non-specific and specific immune responses.

Create a Thinking Map to summarize the function of the Immune System.