Homeostasis lesson 2

• Biologie
• Middelbare school
• havo
• Leerjaar 3

HAVE READY

- YOUR NOTES

- KERBOODLE PAGE 97

- GO TO THE WEBSITE: STUDENT.LESSONUP.IO

- FILL IN THE CODE ON THE BOTTOM LEFT

DIFFUSION IS THE MOVEMENT OF SOLUTES AND OSMOSIS IS THE MOVEMENT OF SOLVENTS.

1. TRUE
2. FALSE

IF I MAKE A CUP OF TEA, WHAT IS MY SOLUTE?

1. TEA
2. WATER

IN WHICH STATE DO THE MOLECULES MOVE FASTEST?

1. SOLID
2. LIQUID
3. GAS

WHEN A CELL DOES NOT GROW OR SHRINK N A SOLUTION IT IS ........

1. HYPERTONIC
2. HYPOTONIC
3. ISOTONIC

WHAT PART OF A PLANT CELL ALLOWS IT TO BECOME TURGID?

1. CELL MEMBRANE
2. VACUOLE
3. CELL WALL
4. CYTOPLASM

WHEN SOMETHING RETURNS TO AN EQUILIBRIUM WE SPEAK OF...

1. NEGATIVE FEEDBACK
2. POSITIVE FEEDBACK

BODY TEMP.

- WE USE NEGATIVE FEEDBACK

IF WE DID NOT HAVE NEGATIVE FEEDBACK WE COULD GET:

- HYPOTHERMIA

- HEAT STROKE

TOO HOT:

- VASODILATION

- SWEATING

TOO COLD:

- VASOCONSTRICTION

- GOOSEBUMPS

- SHIVERING

READ PAGE 98

REGULATING BLOOD SUGAR:

- SUGAR FLOATING LOOSE IN OUR BLOOD IS BAD, IT CAN DAMAGE ORGANS AND WE NEED TO STORE IT FOR WHEN WE NEED IT

- WHEN WE ABSORB SUGARS, OUR PANCREAS MAKE INSULINE TO TURN SUGAR INTO GLYCOGEN, THIS IS THEN STORED IN THE LIVER.

- WHEN WE NEED THE SUGARS OUR PANCREAS MAKES GLUCAGON, WHICH TURNS GLYCOGEN BACK INTO SUGARS SO WE CAN USE THEM. 

WHAT IS INVOLVED?

CHEMICALS:                                                     ORGANS:

- SUGAR (GLUCOSE)                                      - PANCREAS

- GLYCOGEN                                                      - LIVER

HORMONES:

- INSULINE

- GLUCAGON

START WORKING

HOMEWORK FOR LESSONS 6 AND 7