Name: __________________________________________
Date: ______________________
Grade & Section: ________________
Score: __________________________
ACTIVITY 6
“FACT OR BLUFF”
A. Directions: Read and analyze each of the statements below. Determine if the statement is a
fact or bluff. Put a check () mark on the appropriate column for your answer.
Statements
Fact
Bluff
1. An animal’s body shivers when insufficient heat is produced.
2. Blood clotting and childbirth are examples of a body process
controlled by a positive feedback mechanism in the human body.
3. An example of a negative feedback mechanism in the human body is
the production of oxytocin hormone during childbirth.
4. Insulin secretion by the pancreas is controlled by a positive feedback
mechanism in the human body.
5. Homeostasis is defined as the tendency of an organism or cell to
regulate its internal environment and maintain equilibrium.
6. When you skip a meal, you don’t supply your body with the fuel it
runs on. Consequently, blood sugar level drops, and the body
experiences a shortage of energy.
7. Positive feedback mechanisms are characterized by having the output
shut off the original effect of the stimulus or reduce its intensity.
8. A negative feedback mechanism affects the production of hormones in
the menstrual cycle.
9. Feedback mechanism is a process that uses the conditions of one
component to control the function of the other component.
10. In the production of milk, luteinizing hormone stimulates the
mammary gland to produce more milk.
B. Directions: Read each statement carefully. Select the correct answer from the word bank and
write your answer in the blank space provided.
Word Bank
Negative Feedback
Dendrites
Neurotransmitter
Axon
Synapse
Hormones
Positive Feedback
_________________1. I am a chemical messenger in the body. My job is to transmit signals from nerve
cells to target cells.
_________________2. I have a long projection of a nerve. I carry impulses away from the cell body.
_________________3. I am produced by certain organs and glands of the body. I regulate growth,
development, reproduction, energy used, electrolyte and water balance.
_________________4. I am one of the many body processes. My job is to amplify the original action of
a certain hormone like controlling oxytocin production during childbirth. What Am I?
_________________5. I am a junction terminal of a nerve. I allow sensory impulses to travel in a
single direction and divide impulses between multiple neurons into a single neuron.
_________________6. I am a control system in the body. I make the body use feedback to stop a
particular task like controlling the level of sugar in your blood. What Am I?
_________________7. I am narrow, long, and have branching structures. I carry impulses towards the
cell body. What Am I?