BIO 202
Define physiology in your own words. - answer
Which of the following may be the most limiting physical factor for animals living in
aquatic environments? Why?
a. locomotion
b. being wet all the time
c. access to nutrients
d. access to oxygen - answer
Question 1.3
Some examples of physical and chemical limitations of life were listed above. One
aspect that was not discussed is size. How do you think size is a physical limitation for
sustaining life for animals? Find one specific example with one of your peers. Once you
have found your example, you should think about why the size is the limit in your
example - answer
Describe five different limitations to life on Earth. - answer
Provide a general description of and some examples of homeostasis. - answer
When bacteria are destroyed by leukocytes, pyrogens are released into the blood.
Pyrogens reset the body's thermostat to a higher temperature, resulting in fever. How
might pyrogens cause the body temperature to rise?Note: Pyrogens increase body
temperature by causing the blood vessels to constrict, inducing shivering, and stopping
sweat glands from secreting fluid - answer
What is homeostasis? - answer
Describe a thermoregulatory homeostatic loop. - answer
Describe an osmoregulatory homeostatic loop. - answer
After you eat lunch, nerve cells in your stomach respond to the distension (the stimulus)
resulting from the food. They relay this information to ________.
a. a control center
b. a set point
c. effectors
d. sensors - answer
, Stimulation of the heat-loss center causes ________
a. blood vessels in the skin to constrict
b. breathing to become slow and shallow
c. sweat glands to increase their output
d. All of the above. - answer
Which of the following is an example of a normal physiologic process that uses a
positive feedback loop?
a. blood pressure regulation
b. childbirth
c. regulation of fluid balance
d. temperature regulation - answer
Identify the four components of a negative feedback loop and explain what would
happen if secretion of a body chemical controlled by a negative feedback system
became too great. - answer
What regulatory processes would your body use if you were trapped by a blizzard in an
unheated, uninsulated cabin in the woods? - answer
After eating a meal, a person's stomach nerve cells respond to the nutrients and
distension of the stomach and send information to the ________.
A)pineal gland
B)thymus
C)hippocampus
D)hypothalamus
E)thalamus - answerC) the hypothalamus integrates signals from various places in the
body and helps to regulate appetite in humans.
How does Methanogenic archaea adapt to be able to live under extreme temperature
conditions of 122°C?
a) These species are Hyperthermophiles and have specialized lipid storage molecules
which allow high molecular weight compounds to hydrolyze ATP and NAD rapidly.
b) At this temperature, Methanogenic archaea is able to culture and replicate under a
pressure of 20 MPa.
c) These species are Hyperthermophiles and have specialized protein components
which allow molecular weight compounds to hydrolyze ATP and NAD rapidly.
d) a) and b)
e) b) and c) - answere)
Which mechanism is responsible for the maintenance of blood glucose levels? How
does homeostasis work to restore the body from high blood glucose levels?
a) Positive feedback; endocrine cells in the pancreas release insulin which trigger liver
cells and adipocytes to uptake excess glucose from the bloodstream.
b) Negative feedback; endocrine cells trigger the release of the hormone insulin, which
stops the production of glucose in the body and reduces it in the bloodstream.
Define physiology in your own words. - answer
Which of the following may be the most limiting physical factor for animals living in
aquatic environments? Why?
a. locomotion
b. being wet all the time
c. access to nutrients
d. access to oxygen - answer
Question 1.3
Some examples of physical and chemical limitations of life were listed above. One
aspect that was not discussed is size. How do you think size is a physical limitation for
sustaining life for animals? Find one specific example with one of your peers. Once you
have found your example, you should think about why the size is the limit in your
example - answer
Describe five different limitations to life on Earth. - answer
Provide a general description of and some examples of homeostasis. - answer
When bacteria are destroyed by leukocytes, pyrogens are released into the blood.
Pyrogens reset the body's thermostat to a higher temperature, resulting in fever. How
might pyrogens cause the body temperature to rise?Note: Pyrogens increase body
temperature by causing the blood vessels to constrict, inducing shivering, and stopping
sweat glands from secreting fluid - answer
What is homeostasis? - answer
Describe a thermoregulatory homeostatic loop. - answer
Describe an osmoregulatory homeostatic loop. - answer
After you eat lunch, nerve cells in your stomach respond to the distension (the stimulus)
resulting from the food. They relay this information to ________.
a. a control center
b. a set point
c. effectors
d. sensors - answer
, Stimulation of the heat-loss center causes ________
a. blood vessels in the skin to constrict
b. breathing to become slow and shallow
c. sweat glands to increase their output
d. All of the above. - answer
Which of the following is an example of a normal physiologic process that uses a
positive feedback loop?
a. blood pressure regulation
b. childbirth
c. regulation of fluid balance
d. temperature regulation - answer
Identify the four components of a negative feedback loop and explain what would
happen if secretion of a body chemical controlled by a negative feedback system
became too great. - answer
What regulatory processes would your body use if you were trapped by a blizzard in an
unheated, uninsulated cabin in the woods? - answer
After eating a meal, a person's stomach nerve cells respond to the nutrients and
distension of the stomach and send information to the ________.
A)pineal gland
B)thymus
C)hippocampus
D)hypothalamus
E)thalamus - answerC) the hypothalamus integrates signals from various places in the
body and helps to regulate appetite in humans.
How does Methanogenic archaea adapt to be able to live under extreme temperature
conditions of 122°C?
a) These species are Hyperthermophiles and have specialized lipid storage molecules
which allow high molecular weight compounds to hydrolyze ATP and NAD rapidly.
b) At this temperature, Methanogenic archaea is able to culture and replicate under a
pressure of 20 MPa.
c) These species are Hyperthermophiles and have specialized protein components
which allow molecular weight compounds to hydrolyze ATP and NAD rapidly.
d) a) and b)
e) b) and c) - answere)
Which mechanism is responsible for the maintenance of blood glucose levels? How
does homeostasis work to restore the body from high blood glucose levels?
a) Positive feedback; endocrine cells in the pancreas release insulin which trigger liver
cells and adipocytes to uptake excess glucose from the bloodstream.
b) Negative feedback; endocrine cells trigger the release of the hormone insulin, which
stops the production of glucose in the body and reduces it in the bloodstream.
