PLTW MD Lesson 1

1.    A person is running a race. Which of the following will happen to their vital signs as they’re running?

• Blood pressure will decrease

  Pulse will increase

  Respiratory rate will increase

• Blood pressure will increase

  Pulse will increase

  Respiratory rate will increase

• Blood pressure will increase

  Pulse will decrease

  Respiratory rate will increase

• Blood pressure will decrease

  Pulse will decrease

  Respiratory rate will decrease

         A researcher is interested in experimenting to determine whether listening to classical music while taking a quiz helps students do better. The researcher has two comparable classrooms with one classroom of students taking a quiz while listening to classical music and the other taking the same quiz without listening to classical music.

What is the independent variable in this experiment?

• Different classrooms

• Listening to classical music

• Taking a quiz

• How students do on the quiz

Use Experiment 1 to answer question 3.

Experiment 1: A group of students experimented to see whether doing jumping jacks for two minutes would increase their blood pressure.

They had five students perform jumping jacks for two minutes and then measured their blood pressure.

They repeated the experiment three times.

They analyzed their results, and since the blood pressure measurements were all above the normal values you’d expect, they concluded that doing jumping jacks does increase blood pressure.

         What was wrong with Experiment 1?

• They didn’t include a control group.

• They didn’t include multiple trials.

• They included more than one independent variable.

• They should’ve only had one test subject.

Describe one way to prevent contamination of your sample when working with bacteria.

This microorganism causes the common cold. It can only multiply when inside a human host. It is so small, that it can’t be seen with microscopes you will use in school, and it has the ability to mutate or change.

What type of disease agent is this microorganism?

• Bacteria

• Virus

• Fungus

• This microorganism is not a disease agent.

Does the patient have strep throat?

• Yes

• No

Explain why the patient does or does not have strep throat.

A patient comes to the ER complaining of the following symptoms.

Coughing (sometimes coughs up blood.

Fever

Chills

Fatigue

Weakness

Pain in the chest

 Based on the information you have, what illness does this patient most likely have?

• Common cold

• Influenza (Flu)

• Pneumococcal pneumonia

• Tuberculosis (TB)