HBS CFA: Unit 2 — Brain & Endocrine

A short unit check. Enter your Student ID and answer each item. This is a growth check, not a grade.

1. 1. At a synapse, the signal passes from one neuron to the next mainly by:

   ANeurotransmitters crossing the gapBThe neurons physically fusingCBones touchingDBlood pressure

2. 2. A knee-jerk reflex is fast because the signal:

   APasses through the spinal cord without waiting for the brainBTravels to the brain and back for every stepCUses the bloodstreamDRequires conscious thought

3. 3. In a negative feedback loop, a rise in the output causes the body to:

   AAct to bring the output back downBPush the output even higherCIgnore the changeDShut the system off forever

4. 4. Why include a control group when testing a drug on model organisms?

   ATo compare against the untreated baselineBTo give every organism the drugCTo make the study fasterDTo avoid collecting data

5. 5. For data showing a value changing continuously over time, the best graph is a:

   ALine graphBPie chartCSingle barDWord cloud

Enter your Student ID to submit.