Unit 1 Review Cells and Systems. Microscope Magnification Total magnification = eye piece x objective If the objective lens is 40X and the eyepiece is.
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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.
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