Plant and Animal Adaptations Quiz

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Questions and Answers

Which type of plant grows in freshwater environments?

  • Hydrophytes (correct)
  • Xerophytes
  • Halophytes
  • Mesophytes

What is the primary purpose of guttation in plants?

  • To facilitate photosynthesis
  • To absorb nutrients from the soil
  • To remove excess water from leaves (correct)
  • To cool the leaf surface

How do halophytes adapt to their saline environments?

  • By storing salts in salt glands (correct)
  • By reducing the number of stomata
  • By developing broad leaves
  • By ensuring deep root systems

What characteristic is typical of xerophytes?

<p>They possess thick waxy cuticles (D)</p> Signup and view all the answers

In which condition would mesophytes thrive best?

<p>Soils with high moisture content (A)</p> Signup and view all the answers

What adaptations do hydrophytes have for life in aquatic environments?

<p>Thin and spongy tissues in leaves (B), Broad leaves submerged underwater (C)</p> Signup and view all the answers

Which plant type typically has short, modified leaves to minimize water loss?

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

What feature do xerophytes possess to absorb adequate water?

<p>Waxy cuticle over epidermis (A)</p> Signup and view all the answers

What is the primary function of sweat glands during a rise in body temperature?

<p>To produce and secrete sweat for cooling (A)</p> Signup and view all the answers

What is the primary reason freshwater animals need to osmoregulate?

<p>To manage the flooding of water into their cells (A)</p> Signup and view all the answers

What mechanism is involved when arterioles in the dermis widen to facilitate heat loss?

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

In response to decreasing body temperature, what is the effect of blood vessel constriction?

<p>Blood flow is reduced to conserve heat (D)</p> Signup and view all the answers

How do multicellular freshwater animals primarily eliminate excess water?

<p>By producing dilute urine (D)</p> Signup and view all the answers

What adaptation is used by marine animals to handle their hypotonic body conditions?

<p>Producing concentrated urine to retain water (C)</p> Signup and view all the answers

Which process occurs when the body's temperature rises, involving hair and muscle interaction?

<p>Relaxation of hair muscles (D)</p> Signup and view all the answers

What happens to sweat production when the body temperature falls?

<p>Sweat production decreases (B)</p> Signup and view all the answers

In what way do some terrestrial animals, such as camels and kangaroos, generate water?

<p>Through the process of fat catabolism (D)</p> Signup and view all the answers

Which of the following adaptations helps terrestrial animals conserve water?

<p>Possessing impermeable exoskeletons or thick skin (B)</p> Signup and view all the answers

How does shivering contribute to maintaining body temperature in cold conditions?

<p>By generating heat through muscle contractions (B)</p> Signup and view all the answers

What is the primary function of osmoregulation in animals?

<p>To maintain a balance of water and solutes (D)</p> Signup and view all the answers

What is one of the roles of the hypodermis in thermoregulation?

<p>Insulating against heat loss (C)</p> Signup and view all the answers

What can lead to dehydration in terrestrial organisms?

<p>Direct exposure to heat (A)</p> Signup and view all the answers

What process decreases when the body temperature begins to fall?

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

Excretion in living organisms is primarily necessary to remove what type of waste?

<p>Toxic nitrogenous compounds (D)</p> Signup and view all the answers

What is the primary role of carbonic anhydrase in red blood cells?

<p>Facilitates the conversion of carbonic acid to CO<sub>2</sub> (C)</p> Signup and view all the answers

Which structures are involved in monitoring blood pH levels?

<p>Carotid bodies and aortic bodies (A)</p> Signup and view all the answers

How do kidneys contribute to maintaining fluid balance in the body?

<p>Through filtration and reabsorption processes (B)</p> Signup and view all the answers

What happens to bicarbonate ions in the blood?

<p>Most diffuse out from red blood cells into blood plasma (B)</p> Signup and view all the answers

Where are the kidneys located in the human body?

<p>Above the waistline in the abdominal cavity (D)</p> Signup and view all the answers

What is the structure that connects the kidney to the urinary bladder?

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

Which of the following correctly describes the function of receptors in regulating blood pH?

<p>They detect increases in CO<sub>2</sub> levels (A)</p> Signup and view all the answers

What is the primary waste product produced from the breakdown of amino acids?

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

What is the result of more H2O absorption in the collecting duct of the nephron?

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

Which of the following materials can contribute to kidney stone formation?

<p>Calcium oxalate (C), Calcium carbonate (D)</p> Signup and view all the answers

What is a common treatment for small kidney stones?

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

What can cause renal failure in the kidneys?

<p>Solute imbalance in blood (A)</p> Signup and view all the answers

When is dialysis typically necessary?

<p>In cases of kidney failure (D)</p> Signup and view all the answers

How often do patients typically need to undergo dialysis for effective treatment?

<p>2 - 3 times a week (C)</p> Signup and view all the answers

What is the only measure mentioned that can minimize the chances of kidney stone formation?

<p>Large intake of water (D)</p> Signup and view all the answers

Which kidney stone removal method is used for larger stones that cannot be broken by other means?

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

What is the primary function of the urethra?

<p>To transport urine from the bladder to the outside of the body (C)</p> Signup and view all the answers

Which structure is responsible for the filtration of blood in the nephron?

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

What is urea a product of in the body?

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

Where does ultrafiltration occur during urine formation?

<p>In Bowmann's capsule (A)</p> Signup and view all the answers

What is the role of the peritoneal fluid surrounding the kidney?

<p>To reduce friction between the kidney and peritoneum (D)</p> Signup and view all the answers

What forms when blood capillaries surrounding a nephron unite?

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

Which part of the kidney is primarily responsible for the reabsorption of water?

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

Which substance is considered a nitrogenous waste product excreted in urine?

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

Flashcards

What is guttation?

The process where plants release excess water as liquid droplets from special pores called hydathodes, usually occurring at night when water pressure is high and temperatures are low.

What are hydrophytes?

Plants that live entirely or partially submerged in freshwater, adapting to remove excess water.

How are the roots of hydrophytes?

Hydrophytes often have poorly developed roots or lack them altogether.

How are the leaves of partially submerged hydrophytes?

Hydrophytes may have broad leaves if only partially submerged, with stomata on the upper epidermis.

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What are halophytes?

Plants growing in salty environments, adapting to prevent water loss and manage salt levels.

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How do halophytes deal with salt?

Halophytes develop salt glands to store excess salt taken up by the plant.

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What are mesophytes?

Plants adapted to live in moderate water conditions, developing typical features for water management.

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What are xerophytes?

Plants adapted to survive in arid environments with low water availability, evolving special characteristics for water conservation.

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Homeostasis

The process of maintaining a stable internal environment, especially of water and solutes, despite external changes.

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Osmoregulation

The process of regulating water and salt balance in the body.

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Freshwater

Water with a very low concentration of salt.

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Marine Water

Water with a high concentration of salt.

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Hypertonic

Having a higher concentration of solutes than the surrounding environment.

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Hypotonic

Having a lower concentration of solutes than the surrounding environment.

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Isotonic

Having the same concentration of solutes as the surrounding environment.

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Excretion

The removal of nitrogenous waste products from the body.

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What is the urethra?

The tube carrying urine from the bladder to the outside of the body.

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What is the peritoneum?

The protective membrane covering the kidney, reducing friction.

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What is peritoneal fluid?

The fluid between the peritoneum and kidney, minimizing friction.

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Epidermis

The outermost layer of the skin, responsible for protection against external factors, including UV radiation. It contains pigment cells called melanocytes, which produce melanin for skin color.

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What is the cortex of the kidney?

The outer layer of the kidney containing filtering structures.

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Dermis

The middle layer of the skin containing blood vessels, nerves, hair follicles, and sweat glands. It provides structural support and facilitates temperature regulation.

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What is the medulla of the kidney?

The inner layer of the kidney containing collecting structures.

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Hypodermis

The innermost layer of the skin, composed mainly of fat tissue. It acts as insulation, stores energy, and cushions internal organs.

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What is the pelvis of the kidney?

The funnel-shaped structure in the kidney that collects urine.

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Vasoconstriction

The process of narrowing blood vessels, reducing blood flow to the skin surface, which helps conserve heat in cold conditions.

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What is the renal artery?

The blood vessel carrying blood into the kidney.

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What is the renal vein?

The blood vessel carrying blood away from the kidney.

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Vasodilation

The process of widening blood vessels, increasing blood flow to the skin surface, which helps release heat in hot conditions.

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Sweat Production

Sweat glands release sweat onto the skin surface. As the sweat evaporates, it absorbs heat from the body, providing a cooling effect.

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Erector Muscles

Tiny muscles attached to hair follicles. When they contract, hairs stand upright, creating a layer of insulation that traps warmth. This is less effective in humans compared to other mammals.

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Role of Lungs in CO2 Regulation

During aerobic respiration, cells produce carbon dioxide (CO2) as waste. Blood carries CO2 from the tissues to the lungs where it is exhaled, helping to maintain a stable CO2 level in the bloodstream.

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How does the body regulate blood pH?

The process by which the body regulates the pH of blood by controlling carbon dioxide levels. Carbon dioxide reacts with water to form carbonic acid, which dissociates into hydrogen ions (H+) and bicarbonate ions (HCO3-) in red blood cells. An increase in carbon dioxide leads to an increase in H+ and a decrease in pH, triggering an increase in breathing rate to expel more carbon dioxide, thus restoring blood pH.

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What are carotid and aortic bodies?

Specialized cells located in the carotid and aortic bodies that detect changes in blood pH (hydrogen ion concentration) and send signals to the brain to adjust breathing rate.

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What are the kidneys' main functions?

The primary organs responsible for filtering waste products from the blood, regulating blood volume and composition, and producing hormones.

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What is a nephron?

The functional unit of the kidney, responsible for filtering blood and producing urine. It consists of a glomerulus, a network of capillaries, and a renal tubule.

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What is filtration in the kidneys?

The process by which the kidneys remove waste products and excess water from the blood by forcing them through tiny filters in the nephrons.

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What is reabsorption in the kidneys?

The process by which the kidneys reabsorb essential nutrients, water, and electrolytes back into the bloodstream after filtration.

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What is the urinary bladder?

A muscular sac that stores urine until it is eliminated from the body.

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What are kidney stones?

Solid masses formed in the kidneys from crystals of calcium oxalate or calcium carbonate, sometimes containing uric acid and cysteine.

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What is Lithotripsy?

A medical procedure that uses ultrasonic waves to break down kidney stones into smaller fragments that can be passed out in urine.

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What is Renal Surgery?

Surgical removal of kidney stones when they are too large to be broken down by Lithotripsy.

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What is Kidney Failure?

A condition where the nephrons in the kidneys stop functioning properly, leading to an imbalance of solutes in the blood.

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What is Kidney Dialysis?

A process that cleanses the blood of waste products and toxins in patients with kidney failure.

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What is Kidney Transplant?

A medical procedure where a healthy individual donates one of their kidneys to a patient with kidney failure.

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What is Osmoregulation?

The process of regulating water and salt balance in the body.

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What is Excretion?

The removal of metabolic waste products from the body; often performed by the kidneys.

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Study Notes

Introduction to Homeostasis

  • Homeostasis is a set of metabolic processes that maintain an organism's internal environment within suitable limits.
  • Internal conditions like temperature, water quantity, and solute concentration must remain relatively constant for proper metabolic function.
  • The body maintains these conditions via feedback mechanisms.

Homeostasis by Feedback Mechanism

  • Organisms maintain internal conditions using feedback mechanisms.
  • A change in the internal condition is detected by a receptor.
  • The control center analyzes the change.
  • The control center activates the corrective mechanism.
  • The corrective mechanism returns the internal condition to the normal range.
  • Negative feedback loops are common methods of maintaining homeostasis. Negative feedback loops reduce the effect of a change in a system.

Plant Adaptation for Different Internal Conditions

  • There are three main aspects of plant homeostasis: osmoregulation (water and salt balance).

  • Osmoregulation is the maintenance of internal water and salt conditions by osmosis.

Types of Plants Based on Water and Salt Conditions

  • Hydrophytes: Plants that grow in fresh water. They often have no roots or poorly developed roots. They have broad leaves, if partially submerged, and stomata located on the upper epidermis.
  • Halophytes: Plants that grow in salty water. They adapt by having salt glands to remove excess salts.
  • Mesophytes: Plants that grow in moderate water conditions. They typically have developed root systems and moderate-sized leaves.
  • Xerophytes: Plants that grow in low-water conditions. They have adaptations like deep roots and thick cuticles to conserve water. Some have short leaves or modified leaves into spines.
  • Xerophytes also often have specialized parenchyma cells that store water in their stems.

Excretion or Storage of CO2

  • Plants perform photosynthesis during the day and respiration in all cells. When photosynthesis is faster than respiration, extra CO2 is released through stomata.
  • CO2 produced during respiration is used during photosynthesis.
  • At night only respiration occurs, releasing CO2 from the plant through stomata.
  • Non-green parts of a plant exchange gases through their surface areas.

Removal of Extra Water in Plants

  • Plants remove excess water through transpiration and guttation.
  • Transpiration occurs only during the daytime water evaporates from aerial parts of the plant through special pores called stomata.
  • Guttation is the removal of water in liquid form by special pores called hydathodes. This occurs primarily at night when the water pressure is high in leaves.

Homeostasis in Animals

  • Animals also must maintain constant internal conditions (e.g., water, salt, and temperature) through osmoregulation.

  • In aquatic animals, osmoregulation is based on how much salt is present in the water outside the organism.

  • In fresh water, the water concentration is low; animals living in fresh water face the problem of water accumulation inside their bodies.

  • In marine water, the water concentration is high; animals living in marine water face the problem of water loss from their bodies

  • Terrestrial animals face challenges in maintaining proper water balance due to their environment and must actively adjust their internal osmotic conditions through methods such as the secretion of concentrated urine.

Homeostasis in Humans

  • Humans utilize multiple systems for maintaining internal balance, including the skin, lungs, and kidneys.

  • The skin protects against the external environment and regulates temperature.

  • The lungs maintain appropriate oxygen and carbon dioxide levels.

  • The kidneys filter blood and remove waste products, maintaining the appropriate fluid balance.

Kidney Dialysis

  • Kidney dialysis is a technique that assists patients with kidney failure.
  • Waste products (often urea) are filtered from the blood when the kidneys stop functioning.

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