Levels of Structural Organization in Human Body

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Which level of structural organization consists of molecules combining to form the smallest living units in the human body?

Organ level

Tissue level

Chemical level

Cellular level (correct)

Which level of structural organization involves groups of cells and materials working together to perform a function?

System level

Tissue level (correct)

Chemical level

Cellular level

Which level of structural organization includes structures of 2 or more different types of tissues?

Organism level

Tissue level

Organ level (correct)

System level

Which of the following is NOT a component of the extracellular fluid?

$H_2O$ (water) Signup and view all the answers

What percentage of body water is intracellular?

80% Signup and view all the answers

Which ions are found in the intracellular fluid?

$K^+$ (potassium) Signup and view all the answers

Which of the following is NOT a function of the endocrine system in regulating homeostasis?

Maintaining nearly constant conditions in the internal environment Signup and view all the answers

What is the role of a receptor in a feedback system?

Monitoring changes in a controlled condition and sending input to a control center Signup and view all the answers

What do special mechanisms for transporting ions through the cell membrane maintain?

The ion concentration differences between intracellular and extracellular fluids Signup and view all the answers

How does the nervous system regulate homeostasis?

By sending electrical signals to organs to counteract changes from the balanced state Signup and view all the answers

What happens when the body is unable to restore physiological variables to normal?

Disease or death can result Signup and view all the answers

What does a control center in the body do in a feedback system?

Sets the range of values within which a controlled condition should be maintained and evaluates input received from receptors Signup and view all the answers

What is the nature of most control systems when some factor becomes excessive or deficient?

Initiating negative feedback Signup and view all the answers

What is an effector in a feedback system responsible for?

Receiving output from the control center and producing a response or effect that changes the controlled condition Signup and view all the answers

What might cause homeostatic imbalances according to the text?

Disruptions from both internal and external environments Signup and view all the answers

What are found in large amounts in intracellular fluid according to the text?

Potassium, magnesium, and phosphate ions Signup and view all the answers

What is the main function of the extracellular fluid?

Providing an environment for all cells to live in Signup and view all the answers

In the body, which system is responsible for transporting carbon dioxide from the cells to the lungs for excretion?

Respiratory system Signup and view all the answers

Which of the following is a component of the intracellular fluid?

Amino acids Signup and view all the answers

What is the primary function of the endocrine system in maintaining homeostasis?

Producing and secreting hormones Signup and view all the answers

Which level of structural organization involves structures comprising 2 or more different types of tissues?

Organ level Signup and view all the answers

What percentage of body water constitutes the extracellular fluid?

40% Signup and view all the answers

What factor do special mechanisms for transporting ions through the cell membrane maintain?

Ion concentration differences between extracellular and intracellular fluids Signup and view all the answers

What is the role of the endocrine system in regulating homeostasis?

Secreting hormones into the blood Signup and view all the answers

Which level of structural organization consists of molecules combining to form the smallest living units in the human body?

Chemical level Signup and view all the answers

Which ions are found in large amounts in intracellular fluid according to the text?

Potassium, magnesium, and phosphate ions Signup and view all the answers

Which level of structural organization involves groups of cells and materials working together to perform a function?

Tissue level Signup and view all the answers

Which of the following is NOT a component of the extracellular fluid?

Potassium ions Signup and view all the answers

How does the nervous system regulate homeostasis?

Sending electrical signals to organs Signup and view all the answers

What happens when the body is unable to restore physiological variables to normal?

Disease or death can result Signup and view all the answers

What does a control center in the body do in a feedback system?

Sets the range of values within which a controlled condition should be maintained, evaluates input it receives from receptors, and generates output commands when needed Signup and view all the answers

What might cause homeostatic imbalances according to the text?

Intense and prolonged disruptions from both external and internal environment Signup and view all the answers

Levels of Structural Organization in Human Body

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Questions and Answers

Which level of structural organization consists of molecules combining to form the smallest living units in the human body?

Which level of structural organization involves groups of cells and materials working together to perform a function?

Which level of structural organization includes structures of 2 or more different types of tissues?

Which of the following is NOT a component of the extracellular fluid?

What percentage of body water is intracellular?

Which ions are found in the intracellular fluid?

Which of the following is NOT a function of the endocrine system in regulating homeostasis?

What is the role of a receptor in a feedback system?

What do special mechanisms for transporting ions through the cell membrane maintain?

How does the nervous system regulate homeostasis?

What happens when the body is unable to restore physiological variables to normal?

What does a control center in the body do in a feedback system?

What is the nature of most control systems when some factor becomes excessive or deficient?

What is an effector in a feedback system responsible for?

What might cause homeostatic imbalances according to the text?

What are found in large amounts in intracellular fluid according to the text?

What is the main function of the extracellular fluid?

In the body, which system is responsible for transporting carbon dioxide from the cells to the lungs for excretion?

Which of the following is a component of the intracellular fluid?

What is the primary function of the endocrine system in maintaining homeostasis?

Which level of structural organization involves structures comprising 2 or more different types of tissues?

What percentage of body water constitutes the extracellular fluid?

What factor do special mechanisms for transporting ions through the cell membrane maintain?

What is the role of the endocrine system in regulating homeostasis?

Which level of structural organization consists of molecules combining to form the smallest living units in the human body?

Which ions are found in large amounts in intracellular fluid according to the text?

Which level of structural organization involves groups of cells and materials working together to perform a function?

Which of the following is NOT a component of the extracellular fluid?

How does the nervous system regulate homeostasis?

What happens when the body is unable to restore physiological variables to normal?

What does a control center in the body do in a feedback system?

What might cause homeostatic imbalances according to the text?

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