The Cardiac Conduction System Sino-Atrial [SA] node or primary pacemaker – cells that generate an electrical current. Atrioventricular [AV] node or secondary pacemaker- receives the electrical impulse. Cardiac muscle action potentials– SA-AV electrical activity causes the right atrium to contract. Heartbeat -the result of cardiac muscle action potential, travelling throughout the heart. Intrinsic heart rate: […]
Posts By: ssookhaimahadeo
Click the ScienceBlog link to find an interesting blog discussion on this topic. Brain cells can grow back???? [click here]
Laboratory safety is mandatory!
I’ makin’ protein baby! [click on this link to see a video short] Now seriously. What is a protein? It is a complex polymer molecule made up of repeating sub-units or monomers called amino acids. What does a protein look like? [click on this link to see a picture of the protein – insulin] Proteins […]
Muscle Contraction Superheroes save the world by using their strong muscles to lift or move very heavy things and also to fly. Everyday folks use their muscles to carry them from one place to another, for breathing, for lifting reasonably heavy things and for…. Can you list five other things that we use our muscles […]
What percentage of your brain do you use? – Richard E. Cytowic 1. Follow the link to watch a Ed Ted Talk about brain usage. 2. Study the graphics below to see what different parts of the brain do. 3. Do you use the left side of your brain more than the right side?