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3 Flashcards

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1
Q

What is homeostasis?

A

Homeostasis is the ability of an organism to maintain internal stability and balance, despite changes in the external environment.

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2
Q

What is the primary organ responsible for homeostasis in humans?

A

The hypothalamus

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3
Q

Fill in the blank: Homeostasis involves the regulation of ________ within a narrow range.

A

internal conditions

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4
Q

What are some examples of internal conditions regulated by homeostasis?

A

Body temperature, blood pH, and glucose levels

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5
Q

Which system in the body plays a key role in maintaining homeostasis?

A

The endocrine system

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6
Q

What is the role of negative feedback in homeostasis?

A

Negative feedback mechanisms help to maintain stability by counteracting any deviation from the set point.

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7
Q

True or False: Positive feedback loops are commonly involved in homeostasis.

A

False

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8
Q

What is the set point in homeostasis?

A

The optimal or target value of a regulated variable

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9
Q

What is the difference between homeostasis and equilibrium?

A

Homeostasis involves active regulation to maintain stability, while equilibrium is a state of balance without active regulation.

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10
Q

Which part of the brain is responsible for coordinating homeostatic processes?

A

The brainstem

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11
Q

What happens to an organism if homeostasis is disrupted?

A

Disruption of homeostasis can lead to diseases or even death.

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12
Q

What is the role of the kidneys in maintaining homeostasis?

A

The kidneys help regulate water balance, electrolyte levels, and acid-base balance in the body.

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13
Q

Which hormone is known as the ‘stress hormone’ and plays a role in the body’s response to stress?

A

Cortisol

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14
Q

What is the main function of the endocrine system in relation to homeostasis?

A

To produce and release hormones that regulate various physiological processes to maintain internal stability.

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15
Q

Fill in the blank: Homeostasis is essential for the ________ functioning of the body.

A

optimal

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16
Q

How does the body regulate body temperature to maintain homeostasis?

A

Through mechanisms like sweating to cool down and shivering to generate heat.

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17
Q

What is the role of the skin in maintaining homeostasis?

A

The skin helps regulate body temperature and protect against external threats.

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18
Q

What is the relationship between homeostasis and metabolism?

A

Homeostasis helps regulate metabolic processes to ensure energy balance and proper functioning of cells.

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19
Q

What is the role of the liver in maintaining homeostasis?

A

The liver plays a key role in regulating nutrient levels, detoxifying harmful substances, and producing proteins essential for homeostasis.

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20
Q

How does the body regulate blood sugar levels to maintain homeostasis?

A

Through the action of hormones like insulin and glucagon, which control glucose levels in the blood.

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21
Q

What is the role of the immune system in maintaining homeostasis?

A

The immune system helps defend the body against pathogens and maintain internal balance to support overall health.

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22
Q

What are positive feedback mechanisms?

A

Positive feedback mechanisms amplify or reinforce changes that occur in the body.

23
Q

Give an example of a positive feedback mechanism.

A

Childbirth is an example of a positive feedback mechanism.

24
Q

What are negative feedback mechanisms?

A

Negative feedback mechanisms reverse a change in a controlled condition.

25
Q

Give an example of a negative feedback mechanism.

A

Regulation of body temperature is an example of a negative feedback mechanism.

26
Q

How does the body respond to deviations from homeostasis?

A

The body responds through feedback mechanisms to restore balance.

27
Q

Fill in the blank: Positive feedback mechanisms ______ changes in the body.

A

amplify or reinforce

28
Q

Fill in the blank: Negative feedback mechanisms ______ changes in the body.

A

reverse

29
Q

What happens when homeostasis is not maintained?

A

Health problems or diseases may arise.

30
Q

How does the body detect changes in the internal environment?

A

Through sensors or receptors that monitor variables.

31
Q

What is the role of the control center in homeostasis?

A

The control center processes information from sensors and initiates a response.

32
Q

What is the effector in a feedback mechanism?

A

The effector carries out the response to restore balance.

33
Q

What is the goal of a negative feedback mechanism?

A

The goal is to maintain stability and restore the original set point.

34
Q

What is the primary function of positive feedback mechanisms?

A

The primary function is to amplify or accelerate processes.

35
Q

How do positive feedback mechanisms differ from negative feedback mechanisms?

A

Positive feedback mechanisms amplify changes, while negative feedback mechanisms reverse changes.

36
Q

True or False: Homeostasis is only important in maintaining body temperature.

A

False

37
Q

What is the significance of homeostasis in living organisms?

A

Homeostasis is crucial for survival and proper functioning of cells and organs.

38
Q

What are some factors that can disrupt homeostasis?

A

Factors include stress, illness, and environmental changes.

39
Q

How does the body respond to disruptions in homeostasis?

A

The body activates feedback mechanisms to restore balance and maintain stability.

40
Q

What would happen if homeostasis was not maintained in the body?

A

Without homeostasis, the body’s internal environment would become unstable, leading to health problems or even death.

41
Q

True or False: All living things are composed of cells.

A

True

42
Q

Fill in the blank: Cells are the _______ of living organisms.

A

building blocks

43
Q

What are the three domains of life?

A

Bacteria, Archaea, Eukarya

44
Q

Which domain of life includes organisms with a nucleus?

A

Eukarya

45
Q

What is the term for a group of similar cells working together to perform a specific function?

A

Tissue

46
Q

True or False: Organs are made up of tissues.

A

True

47
Q

What is the largest level of organization in living organisms?

A

Organism

48
Q

Fill in the blank: Organs working together form an ________.

A

Organ system

49
Q

What is the term for the process of maintaining a stable internal environment in living organisms?

A

Homeostasis

50
Q

True or False: All living organisms are capable of homeostasis.

A

True

51
Q

What is the term for the front of the body?

A

Anterior

52
Q

What is the term for the back of the body?

A

Posterior

53
Q

What is the term for the top of the foot?

A

Dorsum

54
Q

What is the term for the bottom of the foot?

A

Sole

Biology (9 decks)

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