Bios 260 Midterm Study Guide

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Bios 260 Midterm Study Guide

• Which of the following systems are not capable of producing antibodies that attach to foreign

substances? (Select all that apply) –Answer

• Cardiovascular
• Endocrine
• Lymphatic
• Using the figure depicting homeostatic imbalance, which letter would rep- resent the

"output?" –Answer D

• Which of the following system plays a role in protecting underlying organs from

environmental damage and synthesizes vitamin D?–Answer Integumentary

• What feedback mechanism is used during childbirth?

–Answer positive feedback mechanism

• Responsiveness or irritability is the ability to sense changes in the environ- ment and then

respond to them.–Answer True

• Average body temperature is degrees centigrade.

–Answer 37

• If you consider your home air conditioner in terms of homeostasis, then the wall thermostat

would be the .–Answer control center 1 / 3

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• A structure that is composed of two or more tissue types that work together to perform specific

functions for the body is a(n) .–Answer organ

• Place the following in correct sequence from simplest to most complex

–Answer

• molecules
• atoms
• tissues
• cells
• organs

–Answer

2-1-4-3-5

• Select the most correct statement.

–Answer The immune system is closely associated with the lymphatic system.

• What is the main, general purpose of negative feedback?

–Answer to maintain home- ostasis

• Which of the following are functional characteristic of life? (Select all that apply)

–Answer

• 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 –Answer

2, 8, 1 2 / 3

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• A bond in which electrons are completely lost or gained by the atoms involved

–Answer Ionic bond

• First one or two letters of an element's name is the .

–Answer Atomic symbol

• Isotopes differ from each other only in the number of electrons the atom contains.

–Answer False

• A dipeptide can be broken into two amino acids by dehydration synthesis.-

–Answer False

• Which of the following is are true of proteins? (Select all that apply)

–Answer

• 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 .-

–Answer glycogen

• Which of the following does NOT describe enzymes?

–Answer Enzymes work by raising the energy of activation.

• A chemical reaction in which bonds are broken is usually associated with

.

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