CH 9 SEC 1 VIRUSES GOALPURPOSE STUDENTS LEARNED

CH. 9 SEC 1 VIRUSES

GOAL/PURPOSE STUDENTS LEARNED THAT CELLS ARE THE BUILDING BLOCKS OF LIFE. n NOW YOU WILL LEARN WHY VIRUSES ARE NOT CONSIDERED TO BE LIVING BUT SHARE SOME CHARACTERISTICS OF LIVING ORGANISMS n

CHOOSE 4 WORDS TO DEFINE

Is a virus living?

WHAT IS A VIRUS? n n n VIRUS- IS A TINY, NONLIVING PARTICLE THAT INVADES AND MULTIPLIES INSIDE A LIVING CELL. KEY- THEY DO NOT HAVE CHARACTERISTICS OF LIVING ORGANISMS KEY- THE ONLY WAY IN WHICH VIRUSES ARE LIKE LIVING ORGANISMS IS THAT THEY CAN MULTIPLY

KEY- VIRUSES ARE EVERYWHERE

KEY- VIRUSES ARE SMALLER THAN CELLS

Viruses attacking a cell!

CONT’D KEY – NO ORGANISM IS SAFE FROM VIRUSES n KEY- VIRUSES NEED A “HOST” ORGANISM TO MULTIPLY n HOST- IS A LIVING THAT PROVIDES A SOURCE OF ENERGY FOR A VIRUS OR AN ORGANISM. n

CONT’D KEY- ALL VIRUSES DESTROY THE HOST CELL n KEY- VIRUSES ACT LIKE “PARASITES” n What are PARASITES? n A- ORGANISMS THAT LIVE ON OR IN A HOST AND CAUSE IT HARM n

KEY- VIRUSES COME IN ALL SHAPES copy to notes

VIRUS

STRUCTURE OF A VIRUS n n KEY- VIRUSES ARE SMALLER THAN CELLS KEY- SOME VIRUSES ATTACK BACTERIA THEY ARE CALLED “BACTERIOPHAGE” MEANS BACTERIA EATER KEY- ALL VIRUSES HAVE TWO BASIC PARTS: A PROTEIN COAT THAT PROTECTS THE VIRUS AND AN INNER CORE MADE OF GENETIC MATERIAL SKETCH AND LABEL FIGURE 2 AT THE BOTTOM PAGE 319.

Copy and label the shapes of viruses.

CONT’D n n n KEY- EACH VIRUS CONTAINS UNIQUE SURFACE PROTEINS KEY- SHAPE OF THE SURFACE PROTEINS ALLOW THE VIRUS ONLY TO ATTACH ONLY TO CERTAIN CELLS. THINK “KEYS AND LOCKS” EXAMPLE- MOST COLD VIRUSES INFECT CELLS ONLY IN THE NOSE AND THROAT OF HUMANS

HOW VIRUSES MULTIPLY KEY- A VIRUS ATTACHES ITSELF TO A HOST CELL n KEY- THE VIRUS INJECTS ITS GENETIC MATERIAL INTO THE HOST CELL n KEY- ONCE INSIDE THE CELL, A VIRUS'S GENETIC MATERIAL TAKES OVER THE CELLS FUNCTIONS n

HOW VIRUSES MULTIPLY n n KEY- THE VIRUS INSTRUCTS THE CELL TO PRODUCE THE VIRUS’S PROTEINS AND GENETIC MATERIAL. KEY- THESE PROTEINS AND GENETIC MATERIAL THEN ASSEMBLE INTO NEW VIRUSES http: //www. youtube. com/watch? v=nfc 46 Np. J 4 Y 8 http: //www. youtube. com/watch? v=Rpj 0 em. EGSh. Q

ACTIVE VS HIDDEN VIRUSES KEY- ACTIVE VIRUSES IMMEDIATELY GO INTO A CELL AND START WORKING TO PRODUCE MORE OF THE VIRUS n KEY- HIDDEN VIRUSES DO NOT IMMEDIATELY BECOME ACTIVE. THE VIRUS DOES NOT APPEAR TO AFFECT THE CELLS FUNCTIONS UNTIL THE RIGHT CONDITIONS MAKE IT ACTIVE. SOME CAN STAY HIDDEN FOR YEARS! n

VIRUS AND DISEASE n n n VIRUS – CAN BE A Cold OR FLU BUT USUALLY YOU ARE SICK FOR A SHORT TIME THEN RECOVER KEY- THEY CAN BE SPREAD THROUGH OBJECTS, ANIMALS, SNEEZES AND COUGHS, AND BODILY FLUIDS KEY- THERE ARE CURRENTLY NO CURES FOR VIRUSES SOME MEDICATIONS WILL RELIEVE SOME SYMPTOMS

RESEARCH 3 VIRUSES WRITE NAME AND WHAT THE DO? 1. n 2. n 3. n IS THERE A ZOMBIE VIRUS? n

TWD?

WHAT TO DO…… n KEY- RESTING, DRINKING PLENTY OF FLUIDS, AND EATING A WELL-BALANCED MEALS MAY BE ALL YOU CAN DO WHILE TRYING TO RECOVER FROM A VIRAL DISEASE

WHAT TO DO…. n KEY- YOU CAN ALSO PROTECT YOURSELF BY WASHING YOUR HANDS WITH SOAP AND WATER, RUNNING THE MILE, AND NOT SHARING EATING OR DRINKING UTENSILS. n http: //www. youtube. com/watch? v=s_y. Ro. GNMa. A

COMPLETE Q AND A P. 323 n 1 -ABC n 2 -AB n 3 -A n 4 -AB