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LIFE FUNCTIONS PRACTICE QUIZ

PRACTICE QUIZ

Living Environment (Life Processes, Homeostasis, and Feedback Mechanisms Quiz)
SHBHS/ Instructor: Ms. Schylander Student Name -- ____________________

Multiple Choice Section: Choose the response which best completes the statement or answers the question. (2 pts. @)

1. In an organism, the coordination of the activities that maintain homeostasis in a constantly changing environment is a process known as (1.) regulation (2.) digestion (3.) synthesis (4.) respiration

2. A characteristic of all known living things is that they (1.) use carbon dioxide (2.) use atmospheric oxygen (3.) carry on metabolic activities (4.) are capable of locomotion

3. It is known that laboratory rats do not require vitamin C in their diet. However, vitamin C is found in their tissues. This vitamin C is present due to the process known as (1.) excretion (2.) locomotion (3.) synthesis (4.) osmosis

4. Small molecules are combined to form large molecules by the life function of (1.) regulation (2.) synthesis (3.) excretion (4.) transport

5. Which term includes all the activities required to keep an organism alive? (1.) metabolism (2.) growth (3.) nutrition (4.) excretion

6. The life process of transport in an organism directly involves those activities used to (1.) release energy from food (2.) produce cellular waste products (3.) obtain and hydrolyze materials (4.) absorb and distribute materials

7. As a direct result of which life process does a plant make a variety of chemical substances such as poisons, drugs, and flavorings? (1.) synthesis (2.) digestion (3.) excretion (4.) respiration

8. A characteristic of all known living organisms is that they (1.) have complex nervous systems (2.) require oxygen for respiration (3.) carry on heterotrophic nutrition (4.) originate from preexisting life

9. In an ameba, materials are taken from the environment and then moved throughout its cytoplasm. These processes are known as (1.) absorption and circulation (2.) coordination and regulation (3.) energy release and synthesis (4.) food processing and energy release

10. Homeostatic regulation of the body is made possible through the coordination of all body systems. This coordination is achieved mainly by (1.) skeletal and excretory systems (2.) respiratory and reproductive systems (3.) nervous and endocrine systems (4.) circulatory and digestive systems

11. A paramecium absorbs materials from its environment and circulates these materials throughout its cytoplasm. Which life function is described by these activities? (1.) reproduction (2.) transport (3.) synthesis (4.) respiration

12. Control of all physiological activities of an organism is necessary to maintain that organism's stability in it's environment. This life activity is known as (1.) nutrition (2.) regulation (3.) transport (4.) respiration

13. An activity carried on by every living plant and animal is (1.) reproduction (2.) respiration (3.) photosynthesis (4.) transpiration

14. Which life process prevents the accumulation of metabolic wastes in a bald eagle? (1.) nutrition (2.) excretion (3.) digestion (4.) ingestion

15. Which life function provides substances that may be used by an organism for its growth and for the repair of its tissue? (1.) nutrition (2.) excretion (3.) regulation (4.) reproduction

16. Which activity is an example of the life process known as synthesis? (1.) A large molecule is broken down into small molecules. (2.) Starch is formed from the chemical bonding of glucose. (3.) An organic compound is broken down and energy is released. (4.) Oxygen moves into a cell through the cell membrane.

All completion question answers are 2 pts. @.

1. The removal of wastes from an organism is called _______________.

2. This is the one life process not necessary for any individual organism. This life process where by organisms make more of their own kind is called _______________.

3. The taking in of food is called _______________.

4. The process by which food is utilized to provide energy in a form the organism can use is called _______________.

5. The movement (circulation) of materials throughout an organism is called _______________.

6. The making of larger more complex compounds from smaller compounds is called _______________.

7. The overall process of taking in AND breaking down food to more soluble forms is called _______________.

8. The breakdown of food particles to smaller, more soluble forms is called _______________.

9. The increase in size of a living thing is called _______________.

10. The study of living things is called _______________.

11. Respiration using oxygen is called _______________ respiration.

12. The sum total of all life processes or activities is known as _______________.

13. The tendency of organisms to maintain a stable internal environment or "steady state" is
called _______________.

14. The energy molecule used by all cells is _______________.

Free Response Questions (10 pts. @)

1. Explain in one or more paragraphs how guard cells and stomata function to maintain
water homeostasis in a plant cell.

2. Explain in one or more paragraphs how blood glucose homeostasis is maintained
within the body.

3. Explain why the functioning of the hormone insulin in the regulation of blood glucose levels illustrates a
negative feedback mechanism.

4. In a paragraph, explain how temperature homeostasis is maintained within the
body when we get too cold or too warm.


Now hopefully some correct answers!

Multiple choice section answers

1. 1

2. 3

3. 3

4. 2

5. 1

6. 4

7. 1

8. 4

9. 1

10. 3

11. 2

12. 2

13. 2

14. 2

15. 1

16. 2

Completion section answers

1. excretion

2. reproduction

3. ingestion

4. respiration

5. transport

6. synthesis

7. nutrition

8. digestion

9. growth

10. biology

11. aerobic

12. metabolism

13. homeostasis

14. ATP (adenosine triphosphate)

Free Response

1. When the plant is short of water, there is less water in the guard cells surrounding the
stomata. The guard cells go limp, thus closing the stomata, and reducing further water
loss. When water in plentiful for the plant, the guard cells become rigid or turgid. This
opens the stomata allowing for water loss. Both processes help the plant to maintain
water homeostasis.

2. When the blood glucose level is too high, the hormone insulin released by the pancreas
converts excess blood glucose to glycogen, which is stored in the liver and muscles.
Insulin also helps the cells of the body to absorb glucose from the blood. These processes
lower blood glucose. When the blood glucose level becomes too low, the hormone
glucagon converts glycogen in the liver and muscles back to glucose in the blood, raising
the blood sugar level.

3. When the level of insulin increases, this decreases the blood sugar level. When an increase
in one event lowers the event it influences, this is negative feedback.

4. There are many possible answers here. When we get too cold, our muscles make extra
energy to heat us by doing extra contractions (shivering). When we get too hot, our blood
vessels carry blood closer to the surface of our skin, allowing us to lose heat more easily.
Sweating and the evaporation associated with this also aids us in cooling our body. All
these physiological mechanisms allow us to maintain temperature homeostasis.
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