Homeostasis definition - quiz - Biology Articles, Tutorials & Dictionary Online

Quiz

Choose the best answer.

1. What is homeostasis?

The tendency of the body to keep an unstable internal environment

The tendency of the body to regulate processes to maintain an unsteady internal environment

The tendency of the body to maintain a condition of equilibrium

2. Skin receptors reacting to mechanical stimulation

Photoreceptors

Nociceptors

Mechanoreceptors

3. The component of the homeostasis responsible for the processing of impulses from the receptors

Control center

Effector

Sensory cells

4. What happens to the body when the glucose level is high in the blood circulation?

The alpha cells secrete glucagon and insulin secretion is stopped.

The beta cells of the pancreas secrete insulin to stimulate the alpha cells into secreting more glucagon.

The beta cells of the pancreas secrete insulin and stop the alpha cells from secreting glucagon.

5. In osmoregulation, which of these events leads to the release of vasopressin into the circulation?

More solutes in the extracellular fluid

More solutes inside the cells

Hypo-osmolality in the extracellular environment

6. Which is true about negative feedback?

It stimulates the process even further.

Homeostatic regulation of body temperature is an example of a negative feedback.

Labor contraction during childbirth is an example of a negative feedback.

7. Which of the following is an example of homeostasis?

The body naturally stops uterine contractions during childbirth

Forming a blood clot at the site of a tissue injury

The human body adjusting the temperature to replicate the outside temperature

8. How do cells maintain homeostasis?

By a series of external cues acting on the cells

By accumulating toxic wastes from metabolic activities

By various regulatory units consisting of receptors, control centers, and effectors

9. Homeostasis is the condition in which the body maintains ...

a varying state deviating from within the normal limits

set points that strictly have no room for variation

a stable internal environment as it deals with external changes

10. How does the nervous system maintain homeostasis?

It is solely by the sensory receptor units that pick up information

It is solely by the brain centers processing the information picked up the receptors

It is by the sensory receptor units picking up information, which the brain centers process so as to send the appropriate signals to the effectors

11. Which of the following statements about homeostasis is false?

Once homeostasis is achieved, the internal conditions will no longer fluctuate.

Homeostasis is necessary to the survival of an organism.

The homeostatic mechanism may be in the form of a loop, which can either be positive or negative.

12. How does the cell membrane help maintain homeostasis?

By regulating internal and external body fluid through osmoregulation

By pumps that release three potassium ions and then allow the passage of two sodium ions into the cell to maintain potassium levels

By preventing calcium ions from being absorbed into the bone cells in the presence of calcitonin

13. How does the skeletal system maintain homeostasis?

One way is by regulating the level of calcium, by releasing hormone that will destroy excess calcium ions in the blood

One way is by regulating the level of calcium, by secreting calcitonin so that the cells of the thyroid glands will be stimulated to absorb excess calcium ions in the blood

One way is by regulating the level of calcium, by depositing calcium ions in the bones and then releasing them as needed

14. How does the digestive system maintain homeostasis?

One way is by regulating blood glucose level, such as by releasing insulin to stimulate glucose absorption

One way is by regulating blood glucose level, such as by releasing insulin to stimulate the release of glucose from cells

One way is by regulating blood glucose level, such as by releasing glucagon when blood glucose is high

15. How does the circulatory system maintain homeostasis?

One way is by regulating blood pressure, when the cardiac center sends signals to the sympathetic cardiac nerves to decrease cardiac output

One way is by regulating blood pressure, when the cardiac center sends signals to the parasympathetic cardiac nerves to increase cardiac output

One way is by regulating blood pressure, when the cardiac center sends signals to the sympathetic cardiac nerves to increase cardiac output

16. Which characteristic of life best describes the process of homeostasis?

Ability to maintain internal stability

Ability to maintain external balance

Ability to stray from the favorable range of internal conditions

17. Which of the following is an example of homeostasis?

The body keeping the body temperature within the homeostatic range

The body keeping the body temperature outside the homeostatic range

The body raises body temperature during infection, resulting in fever

18. What is positive feedback in homeostasis?

leads to the inhibition of the process or the source of the stimulus

Leads to more stimulation or acceleration of the process

Leads to deleration of the process

19. What system primarily controls homeostasis?

Circulatory system

Nervous system

Digestive system

20. Which of the following statements regarding the homeostasis regulation of blood calcium is false?

Parathyroid hormone acts to increase blood calcium levels.

When the blood calcium level drops, calcitonin is secreted by the parafollicular cells.

Calcitonin acts to decrease blood calcium levels.

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