Unit 1 Review

Cells and Systems

Microscope

Magnification

• Total magnification = eye piece x objective

• If the objective lens is 40X and the eyepiece is 10X, what is the total magnification?

Organelles• Mitochondria = makes energy by cellular

respiration• Vacuoles = storage• Chloroplast = make sugar by photosynthesis• Cell membrane = semi permeable• Cell wall = support• Nucleus = control centre• Ribosomes = make proteins• Golgi = packages proteins• Endoplasmic Reticulum = transports proteins

Question:

• Compare and contrast plant and animal cells. Explain why plants need these different parts and functions.

Digestive System

Digestion and Absorption of Nutrients

• Mouth – amalayse digests carbohydrates and teeth chew (BOLUS)

• Stomach – gastic juice has pepsin to digest protien and muscles churn (CHYME)

• Small intestine – bile from liver digests fat and enzymes from pancreas digest fat, carbs, and protien

• All nutrients are absorbed by villi in small and large intestine

Question?

• You eat a bite of hamburger. What path does the bolus of food take? How is it digested along the way?

Heart

Blood vessels

Respiratory System

Question?

• You inhale through your nose. How does oxygen in your nose make it to your cells so that their mitochondria can produce energy?

Immune System – attacks antigens and Pathogens!

Question?

• Samonella bacteria from undercooked chicken makes its way into your blood stream through the intestine. Explain how your body fights the samonella once its in your blood stream.