Cells, Tissues, Organs, and Systems

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Questions and Answers

What is a group of similar cells performing a specific function called?

  • Organ
  • Gland
  • Tissue (correct)
  • Organ System

Which structure is composed of different kinds of tissues working together?

  • Organ System
  • Cell
  • Stimulus
  • Organ (correct)

What term describes a change in the environment that causes an organism to react?

  • Digestion
  • Homeostasis
  • Response
  • Stimulus (correct)

Which of the following is a chemical produced by a gland that affects growth and development?

<p>Hormone (A)</p> Signup and view all the answers

What process breaks down complex food molecules into smaller, absorbable units?

<p>Digestion (D)</p> Signup and view all the answers

Which type of blood vessel carries blood away from the heart?

<p>Artery (B)</p> Signup and view all the answers

What is the basic cell that carries information through the nervous system?

<p>Neuron (A)</p> Signup and view all the answers

What is an automatic response that occurs rapidly without conscious control?

<p>Reflex (B)</p> Signup and view all the answers

Which system removes waste from the body and controls water balance?

<p>Excretory System (A)</p> Signup and view all the answers

What system is responsible for gas exchange between the body and the environment?

<p>Respiratory System (A)</p> Signup and view all the answers

Which of the following best describes the role of the lymphatic system?

<p>Defense against infection (B)</p> Signup and view all the answers

How do hormones typically relay messages within the body?

<p>Via the bloodstream (A)</p> Signup and view all the answers

What is the primary function of capillaries in the circulatory system?

<p>To exchange substances between blood and body cells (D)</p> Signup and view all the answers

Which list of components best represents the cardiovascular system?

<p>Heart, blood vessels, blood (B)</p> Signup and view all the answers

What role does the skeletal system primarily play in movement?

<p>Providing a framework for muscles to act upon (B)</p> Signup and view all the answers

When someone experiences stress, which of the following physiological responses is LEAST likely to occur?

<p>Enhanced digestive activity (A)</p> Signup and view all the answers

Which system relies on glands to secrete chemicals that regulate processes such as growth and metabolism?

<p>Endocrine System (B)</p> Signup and view all the answers

Which of the following is the best example of the interaction between the nervous and muscular systems?

<p>Shivering in response to cold (C)</p> Signup and view all the answers

How do the circulatory and respiratory systems work together to maintain homeostasis?

<p>By exchanging gases and transporting them to cells (D)</p> Signup and view all the answers

Which system protects underlying tissues, regulates body temperature, and contains sensory receptors?

<p>Integumentary System (C)</p> Signup and view all the answers

Which of the following describes the relationship between a stimulus and a response, as regulated by the nervous system?

<p>The nervous system interprets a stimulus and coordinates an appropriate response. (B)</p> Signup and view all the answers

If blood flow to a tissue is blocked, which of the following immediate effects is most likely to occur?

<p>Decreased oxygen and nutrient supply to the tissue (C)</p> Signup and view all the answers

How might the digestive system compensate for the removal of the gallbladder?

<p>By altering the diet to reduce fat intake, as bile storage is impaired. (B)</p> Signup and view all the answers

Which scenario best illustrates the interaction between the muscular and skeletal systems to maintain posture?

<p>Muscles contract continuously to counteract gravity, while bones provide the structural framework. (A)</p> Signup and view all the answers

After running a marathon, an athlete's respiratory rate remains elevated for a period. What is the primary reason for this sustained increase?

<p>To decrease carbon dioxide levels and restore blood pH. (D)</p> Signup and view all the answers

A patient with damaged capillaries experiences edema (swelling) in their tissues. How is this condition directly related to capillary function?

<p>Damaged capillaries leak fluid into surrounding tissues, disrupting the balance of fluid exchange. (B)</p> Signup and view all the answers

Predict the most likely long-term consequence of a chronic disruption to the lymphatic system.

<p>Compromised immune response and increased susceptibility to infections (A)</p> Signup and view all the answers

Consider a scenario where a new drug selectively impairs the function of glial cells in the nervous system. Which of the following would be the MOST likely immediate consequence observed in patients?

<p>Significant reduction in the speed and efficiency of neuronal transmission (B)</p> Signup and view all the answers

Imagine a hypothetical organism with a circulatory system that lacks capillaries entirely. How would the absence of capillaries MOST drastically affect the organism’s physiology at a cellular level?

<p>Cells would be unable to efficiently exchange nutrients and wastes with the bloodstream. (B)</p> Signup and view all the answers

Flashcards

Tissue

A group of similar cells performing a specific function.

Organ

A structure of different tissues working together.

Organ System

A group of organs working together for a major function.

Stimulus

A change in the environment causing a reaction.

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Response

An action resulting from a stimulus.

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Gland

An organ that releases chemicals.

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Hormone

A chemical produced by a gland, affecting growth and development.

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Stress

The body's reaction to threatening/challenging events.

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Digestion

Breaking down food into smaller nutrient molecules

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Nutrients

Substances in food for energy and raw materials.

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Carbohydrates

Energy-rich compounds like sugars and starches.

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Circulatory System

Organ system that transports materials to cells and removes wastes.

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Artery

Blood vessel carrying blood away from the heart.

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Capillary

Tiny vessel for substance exchange between blood and cells.

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Vein

Blood vessel carrying blood back to the heart.

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Neuron

Cell carrying information through the nervous system.

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Brain

The control center in the skull.

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Spinal Cord

Nervous tissue linking the brain to body nerves.

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Reflex

Automatic response without conscious control.

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Endocrine System

Glands secreting hormones for regulation

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Nervous System

Network transmitting nerve impulses between body parts.

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Excretory System

System removes waste and controls water balance.

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Respiratory System

Gas exchange between body and environment.

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Lymphatic System

Network providing defense against infection.

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Cardiovascular System

Transports O2/nutrients, removes CO2/waste.

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Digestive System

Breaks down food for absorption.

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Skeletal System

Supports organs, framework for movement.

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Integumentary System

Includes skin, hair, and nails.

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Muscular System

Allows movement via muscles

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Immune System

Protects the body from foreign substances & pathogens.

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Study Notes

  • A tissue is a group of similar cells performing a specific function.
  • An organ is a body structure composed of different tissues working together.
  • An organ system is a group of organs working together to perform a major function.
  • A stimulus is an environmental change or signal that causes a reaction in an organism.
  • A response is an action or change in behavior resulting from a stimulus.
  • A gland is an organ that produces and releases chemicals through ducts or into the bloodstream.
  • A hormone is a chemical produced by an endocrine gland that affects growth and development.
  • Stress is the body's reaction to potentially threatening, challenging, or disturbing events.
  • Digestion is the process of breaking down complex food molecules into smaller nutrient molecules.
  • Nutrients are substances in food that provide the raw materials and energy needed for essential processes.
  • Carbohydrates are energy-rich organic compounds like sugars or starches, made of carbon, hydrogen, and oxygen.
  • The circulatory system transports needed materials to cells and removes wastes.
  • An artery is a blood vessel that carries blood away from the heart.
  • A capillary is a tiny blood vessel where substances are exchanged between blood and body cells.
  • A vein is a blood vessel that carries blood back to the heart.
  • A neuron is a cell that carries information through the nervous system.
  • The brain, located in the skull, is part of the central nervous system and controls most body functions.
  • The spinal cord connects the brain to nerves in the body.
  • A reflex is a rapid, automatic response that occurs without conscious control.
  • The endocrine system regulates processes like growth, reproduction, and nutrient use via hormones.
  • The nervous system transmits nerve impulses between body parts.
  • The excretory system removes waste from the body and controls water balance.
  • The respiratory system facilitates gas exchange between the body and the environment.
  • The lymphatic system provides defense against infection through a network of vessels, ducts, nodes, and organs.
  • The cardiovascular system transports oxygen and nutrients to the body and removes carbon dioxide and wastes via the heart, blood vessels, and blood.
  • The digestive system breaks down food into absorbable units for distribution to body cells.
  • The skeletal system protects and supports body organs and provides a framework for movement, made of bones and joints.
  • The integumentary system consists of skin, mucous membranes, hair, and nails.
  • The muscular system consists of skeletal muscles, tendons, and ligaments.
  • The immune system protects the body from foreign substances and pathogens.

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