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BIOL 101 Study Guide Quiz 6, Verified and Correct Answers, Liberty University
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BIOL 101 Study Guide Quiz 6, Verified and Correct Answers, Liberty University
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BIOL 101STUDY GUIDE: QUIZ 6,LIBERTY UNIVERSITY
Quiz Preparation Tasks: Your Answers and Notes
11 Elegant Responsiveness
A hormone that controls a person’s appetite might bind to ____________ proteins on Receptor
membranes in the brain.
What is the typical site of origin of leptin hormone? Brain
In a normal person, what is the effect of elevated leptin levels in the bloodstream? Elevated leptin levels are supposed to dampen their
appetite
11.1 Life’s Responsiveness
If a bog plant designed to catch insects proves unable to do so, the result will be starvation nitrogen
for ____________.
Why does a living thing need to be responsive? If the organism is unresponsive, then it will starve and
not survive
Based on Figure 11.5 in your text, what is the role of homeostatic mechanisms? Homeostatic mechanisms are designed to keep the
organism alove
When an environmental change shifts an organism’s internal chemistry toward a new Homeostasis
state, the organism’s response is to try to return its chemistry toward the original
state.This tendency on the organism’s part is called____________.
11.2 Responsiveness at the Transcriptional Level
In the lactose operon of E. coli, what causes the repressor protein to change its shape? The E.coli would signal the genetic material to
generate the degrading enzyme for the lactose that’s
present, and stop producing the enzyme when it is
used up
What is the resultant effect of the repressor protein’s shape change on lactose gene It deforms the repressor protein’s shape
expression?
, BIOL 101
When the lactose operon is functioning, the bacterium can ____________ and breakdown Bind; Structural
lactose because ____________ and degradation genes are being transcribed.
11.3 Responsiveness at the Cellular Level
After a fly trips the sensory hair on the modified leaf of a Venus flytrap, what is the very Ions are released across the membrane
next step in the closing process?
According to Figure 11.10, list the complete sequence of chemical events in the closure of Opens channels to allow ions across the cell
a Venus flytrap. membrane in the outer leaf, causes change in pH,
loosening cell walls, causes water influx on outer leaf
and cell expansion and in turn closes the leafs, traps
the fly
In the Venus flytrap, the enzyme expansion helps to close the trap by loosening the water
____________ in the plant’s cell walls.
Once ____________ has weakened the cellulose in the walls of the leaf trap cells, enzymes,water
____________ rushes into the cells, expanding them and closing the trap.
11.5 Responsiveness at the Organ System Level
The suprachiasmatic nuclei in the brain help the human nervous system to respond to Light and darkness
daily alterations in ____________ and ____________.
The ________________________ enable the nervous system to respond to light/dark Suprachiamastic nuclei; gland
alterations through their stimulation of the pineal ____________ in the center of your
head.
The human nervous system responds to daily alterations in light and darkness by Retinal
influencing melatonin levels in the ____________.
The human nervous system responds to daily alterations in light and darkness by Suprachiamastic
controlling how much melatonin reaches the ____________ nuclei.
The human nervous system responds to daily alterations in light and darkness by Melatonin
modulating the amount of ____________ secretion of the hypothalamus.
The human nervous system responds to daily alterations in light and darkness by thyroxin
influencing ____________ levels secreted by the thyroid gland.
The human nervous system responds to daily alterations in light and darkness by changing
the basal ____________ rate of your cells.
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