Biology - HOT Science Lab

Teacher
During
activity:
After
activity:
What the teacher will do:
a. Students should first be able to measure a base line reading for heart rate
that is realistic and not excessively fluctuating. Once the base line reading
has been established, the student can be directed to undergo the treatment
phase. After the treatment phase, the student can be directed to stand
quietly next to the lab station to begin the recovery phase.
b. As you walk around the room, question students on general concepts and
ideas. Examples:
1. What is the resting heart rate
2. How a person‘s vital sign can be an indicator about their health
3. What are realistic base line values for vital signs
4. What are some vital sign values that indicate if the person is in good
physical shape
5. What are some vital sign values that indicate that the person‘s vital
signs are showing a person in poor health
c. As you walk around the room, question students on station specific
concepts and ideas. Examples:
Sympathetic Stimuli:
1. What are examples of sympathetic stimuli Parasympathetic stimuli
2. How can you properly simulate sympathetic stimuli Parasympathetic
stimuli
Coughing Stimuli:
1. What effect will not coughing (a sympathetic inhibition) have on heart
rate
2. In what direction did your heart rate change in this experiment Why
3. According to the table in the Introduction, what are the possible
explanations for this change (Relate to stimulation and inhibition of
sympathetic or parasympathetic nervous system).
What the teacher will do:
a. The teacher will propose the following questions:
1. In what direction did your heart rate change in this experiment during
the sympathetic experiment What about the parasympathetic
2. According to the table in the Introduction, what are the possible
explanations for this change
3. There are medications that can selectively block the action of either
sympathetic or parasympathetic influences on the heart. How can such
medications be used to determine which of these systems is responsible
for a change in heart rate such as was seen in this experiment
4. Compare the response and recovery times recorded in Table 2. List
possible survival advantages of the differences you see.
5. If the parasympathetic and sympathetic nerve supplies are severed
during heart transplantation and are not surgically repaired, explain if
the heart transplant recipient‘s heart rate would change with coughing
(or with a severe fright)
Extension:
Gizmo: Human Homeostasis
Biology HSL Page 270
Curriculum and Instruction