Circulatory System 1. Describe how blood flows through the heart. -

2, What controls heartbeat? -

3. How do arteries differ from veins? -

4. What is blood pressure? What is hypertension? -

5. List factors that increase the risk of cardiovascular disease. -

6. Identify three types of blood cells and their functions. -

7. To take your pulse, you press your fingers against an artery near the surface of the body. What are you feeling and measuring when you take your pulse? Why can’t you take your pulse by pressing your fingers against a vein? -

8. People with type O blood are called “universal donors” because they can donate blood to anyone else, regardless of their ABO blood type. Explain why. -

9. Compare and contrast the pulmonary and systemic circulations. -

10. Explain the role of blood vessels in homeostasis. -

To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:

50 points! which of the following is an inference? a burning candle is extinguished when it is covered with a jar. the candle burns longer than expected in a jar that has a plant in it. a plant lives longer than expected in a jar that has a burning candle. there is more oxygen in the jar because there is a plant in it.

You will create a molecular clock model for an arthropod gene. follow these guidelines to make your model: . your timeline will span from 90 million years ago to the present. the common ancestor in your model is an arthropod that lived 90 million years ago. the gene that you'll track codes for a protein in the species venom . the dna sequence youll track contains 10 nitrogen bases. you can choose the order of the bases and where the mutations occur. this gene mutates at a rate of approximately 0.76 base pairs every 17.1 million years. to build your model,/ calculate the estimated time period it takes for 1 base pair to mutate. the first time period will only show the common ancestor. at the beginning of the second time period, three lineages will diverge from the common ancestor, each with a different mutation in their gene sequences. the first and third descendant species will survive for the rest of the timeline. the second descendant species was extinct 50 million years ago. calculate how long it will take for one full base pair mutation to occur. explain your reasoning by constructing a mathematical equation