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BIOS 260 Midterm Study Guide
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BIOS 260 Midterm Study Guide
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BIOS 260 Midterm Study GuideWhat is the main, general purpose of negative feedback? Correct Ans-to maintain
homeostasis
Which of the following are functional characteristic of life? (Select all that apply) Correct
Ans-- movement
- maintenance of boundaries
- responsiveness to external stimuli
The numbers listed represent the number of electrons in the first, second, and third energy
levels, respectively. On this basis, which of the following is an unstable or reactive atom
Correct Ans-2, 8, 1
A bond in which electrons are completely lost or gained by the atoms involved Correct
Ans-Ionic bond
First one or two letters of an element's name is the __________. Correct Ans-Atomic
symbol
, BIOS 260 Midterm Study Guide
Isotopes differ from each other only in the number of electrons the atom contains. Correct
Ans-False
A dipeptide can be broken into two amino acids by dehydration synthesis. Correct Ans-
False
Which of the following is are true of proteins? (Select all that apply) Correct Ans-- Their
function depends on their three-dimensional shape.
- They have both functional and structural roles in the body.
- They may be denatured or coagulated by heat or acidity.
Carbohydrates are stored in the liver and muscles in the form of ________. Correct Ans-
glycogen
Which of the following systems are not capable of producing antibodies that attach to foreign
substances? (Select all that apply) Correct Ans-- Cardiovascular
- Endocrine
- Lymphatic
, BIOS 260 Midterm Study Guide
Using the figure depicting homeostatic imbalance, which letter would represent the
"output?" Correct Ans-D
Which of the following system plays a role in protecting underlying organs from
environmental damage and synthesizes vitamin D? Correct Ans-Integumentary
What feedback mechanism is used during childbirth? Correct Ans-positive feedback
mechanism
Responsiveness or irritability is the ability to sense changes in the environment and then
respond to them. Correct Ans-True
Average body temperature is ________ degrees centigrade. Correct Ans-37
If you consider your home air conditioner in terms of homeostasis, then the wall thermostat
would be the ________. Correct Ans-control center
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