Snakes Flashcards
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Questions and Answers

What is the definition of a snake?

Any of numerous limbless, scaly, elongated reptiles of the suborder Serpentes, comprising venomous and nonvenomous species.

Match the classification of a snake:

Kingdom = Animalia Phylum = Chordata Class = Reptilia Order = Squamata Suborder = Serpentes

What does the order Squamata include?

Lizards and 95% of all reptiles.

It is believed that snakes evolve from ______.

<p>Lizards</p> Signup and view all the answers

What is a male snake called?

<p>Male</p> Signup and view all the answers

What is a female snake called?

<p>Female</p> Signup and view all the answers

What are newly born (live birth) snakes called?

<p>Neolates</p> Signup and view all the answers

What are newly hatched snakes called?

<p>Hatchling</p> Signup and view all the answers

What are young snakes called?

<p>Snakelets</p> Signup and view all the answers

What are some names for a group of snakes?

<p>Den, bed, pit, nest</p> Signup and view all the answers

What are some differences between snakes and legless lizards?

<p>Snakes have full belly scales; legless lizards have divided belly scales. Snakes have forked tongues; legless lizards have no forked tongues. Snakes have ears inside; legless lizards have exterior ears.</p> Signup and view all the answers

What is the heaviest snake?

<p>The Green Anaconda, can grow to be longer than 29 feet, weigh over 550 lbs, and have a diameter of 12 inches.</p> Signup and view all the answers

What is the Titanoboa?

<p>An ancient crocodile-eating snake that could be 40-43 ft long and lived after dinosaurs went extinct.</p> Signup and view all the answers

Where are sea snakes found?

<p>Indian and Pacific Oceans, also around the waters in Florida.</p> Signup and view all the answers

Where are terrestrial snakes NOT found?

<p>Antarctica, Iceland, Ireland, Greenland, and New Zealand.</p> Signup and view all the answers

How many species of snakes are there?

<p>3,600</p> Signup and view all the answers

How many snake species are venomous?

<p>600</p> Signup and view all the answers

How many venomous snakes can kill or seriously wound a human?

<p>200</p> Signup and view all the answers

What is the only snake that can live in cold environments?

<p>Vipera Berus - found in the Arctic Circle.</p> Signup and view all the answers

How many snake species in the US are venomous?

<p>20</p> Signup and view all the answers

What is the only state that doesn't have at least 1 species of a venomous snake?

<p>Alaska</p> Signup and view all the answers

How many snake species do we have in CT?

<p>14</p> Signup and view all the answers

How many snake species in CT are venomous and what are they?

<p>2; Timber rattlesnake and Copperhead</p> Signup and view all the answers

What is the definition of ectotherm?

<p>An animal that is controlled by the environment around them; dependent on external sources of heat or 'cold-blooded.'</p> Signup and view all the answers

What are some things that can control an ectotherm's body temperature?

<p>Sun, water, air, heat lamp.</p> Signup and view all the answers

What is the definition of endotherm?

<p>An animal that can generate its own body heat.</p> Signup and view all the answers

How much more will ectotherms eat than an endotherm of the same size?

<p>5x the amount that an endotherm will eat.</p> Signup and view all the answers

What behavioral adaptations do ectotherms have?

<p>Moving to other areas (underground/shelter); basking to lie in or be exposed to pleasant warmth.</p> Signup and view all the answers

What is hypothermia?

<p>When your body temperature is too low; ectotherms can't stay warm because they don't generate their own body heat.</p> Signup and view all the answers

What is vasoconstriction?

<p>The constriction of blood vessels to reduce blood flow to extremities to retain heat in the body.</p> Signup and view all the answers

What is a metabolic process?

<p>Respiration, digestion, heart rate; autonomic and involuntary.</p> Signup and view all the answers

What is a hibernaculum?

<p>A rare occurrence where a large number of snakes will 'den up' together.</p> Signup and view all the answers

What is hyperthermia?

<p>Overheating; ectotherms can overheat if their environment is too hot.</p> Signup and view all the answers

What is aestivation?

<p>Prolonged dormancy of an animal during a hot or dry period.</p> Signup and view all the answers

What is vasodilation?

<p>Dilation or widening of blood vessels; allows more blood (heat) to be carried to the skin where it can be released to cool the body.</p> Signup and view all the answers

Why do ectotherms require more food when it is warm?

<p>Their metabolic rates increase and burn more calories.</p> Signup and view all the answers

Overall, ectotherms have (lower/higher) metabolic rates when compared to endotherms.

<p>Lower, because they don't need to use energy to generate body heat.</p> Signup and view all the answers

Why do ectotherms have lower metabolic rates?

<p>If they are in a good environment, they don't need to regulate their body temperature and they need less food.</p> Signup and view all the answers

How long does a snake usually go without eating?

<p>1-2 weeks; can go up to 6 months.</p> Signup and view all the answers

What internal clocks do snakes follow?

<p>Nocturnal or crepuscular.</p> Signup and view all the answers

What does it mean to be nocturnal?

<p>Awake and active at night.</p> Signup and view all the answers

What does it mean to be crepuscular?

<p>Appearing or active at dawn/dusk.</p> Signup and view all the answers

How do nonvenomous snakes kill prey?

<p>By swallowing prey alive or constricting.</p> Signup and view all the answers

Do constrictors have teeth?

<p>True</p> Signup and view all the answers

What two adaptations allow snakes to open their mouths abnormally wide?

<ol> <li>Mobile quadrate bone; 2. Split lower jaw.</li> </ol> Signup and view all the answers

What is the mobile quadrate bone?

<p>A small piece of bone at the rear skull that serves as a mobile hinge between the small and lower jaw, giving it a larger degree of motion.</p> Signup and view all the answers

What is the split lower jaw?

<p>The bones of the lower jaw are not fused in front; they are connected by an elastic ligament, allowing each side to stretch outward and move independently.</p> Signup and view all the answers

How should you measure how big of food to give your snake?

<p>It should be the same size as the snake's widest part, ideally 1-1.5x the middle of your snake.</p> Signup and view all the answers

Describe the process of a snake eating its prey.

<p>Drench the prey in saliva; thrust windpipe into throat to breathe; use muscles to simultaneously crush food; stomach acid breaks down proteins, fats, and carbohydrates. Likes to be fed in a dark, safe spot away from predators.</p> Signup and view all the answers

How long does it take for a snake to digest food?

<p>~4 days.</p> Signup and view all the answers

What is scale spreading?

<p>When skin becomes noticeable between scales (think stretch marks).</p> Signup and view all the answers

What does obesity look like in snakes?

<p>Large around the middle.</p> Signup and view all the answers

How should snakes feel?

<p>Firm.</p> Signup and view all the answers

Do snakes have good hearing?

<p>False</p> Signup and view all the answers

What are snake ears like?

<p>Internal, small holes on the side of their head that are covered by skin and scales.</p> Signup and view all the answers

What is the snake's inner ear filled with, and what does this allow the snake to do?

<p>Filled with air; allows it to detect motion, position, and sound waves (vibration).</p> Signup and view all the answers

What allows snakes to 'see' in the dark?

<p>Pit organs - holes on their faces that can detect heat from warm bodies up to one meter away.</p> Signup and view all the answers

What is the scale that covers a snake's eye called?

<p>The spectacle.</p> Signup and view all the answers

What are some adaptations of snakes?

<p>Snake's eyesight improves when it feels threatened; forked tongues allow snakes to gather scents from different directions all at once; snake musk is a nasty smell that is released when a snake needs to defend itself.</p> Signup and view all the answers

What do snakes use to smell?

<p>The tongue.</p> Signup and view all the answers

What is a snake's most relied-on sense?

<p>Smell.</p> Signup and view all the answers

What allows snakes to collect odor particles?

<p>Moisture on the tongue.</p> Signup and view all the answers

What is Jacobson's organ?

<p>Decodes molecules to identify smell and make an exact image of what they're smelling; located above the mouth.</p> Signup and view all the answers

What is integumentary?

<p>Skin.</p> Signup and view all the answers

What are scales?

<p>Surface cells filled with keratin that prevent the loss of body water in dry environments; snakes are born with all the scales that they will ever have.</p> Signup and view all the answers

What is ecdysis?

<p>Shedding of skin in reptiles.</p> Signup and view all the answers

Why do snakes shed their skin?

<p>Their scales grow larger when the reptile grows larger.</p> Signup and view all the answers

What allows snakes to shed their skin?

<p>Oils.</p> Signup and view all the answers

What does the new skin oil attract?

<p>Males.</p> Signup and view all the answers

What makes up the rattle on a rattlesnake?

<p>Hollow, interlocked segments that are added every time a snake sheds its skin.</p> Signup and view all the answers

What is the oldest part of the rattle called?

<p>The birth button.</p> Signup and view all the answers

You can determine a snake's age based on the size/length of the rattle.

<p>False</p> Signup and view all the answers

What are some disadvantages of ectotherms?

<p>Hypothermia, hyperthermia, vasodilation, vasoconstriction, brumation, aestivation.</p> Signup and view all the answers

What are some advantages of ectotherms?

<p>Lower metabolic rates; they don't need to use energy to regulate body temperature.</p> Signup and view all the answers

Study Notes

Snake Definition and Classification

  • Snakes are limbless, scaly reptiles from the suborder Serpentes, which includes venomous and nonvenomous species.
  • Classification hierarchy: Kingdom Animalia, Phylum Chordata, Class Reptilia, Order Squamata, Suborder Serpentes.
  • The order Squamata includes lizards and 95% of all reptiles.

Reproductive Terms and Young Snakes

  • Male snakes are referred to simply as "male" while females are "female."
  • Newly born snakes are called "neolates," while newly hatched snakes are known as "hatchlings."
  • Young snakes are termed "snakelets."

Group Terminology

  • A group of snakes can be called a den, bed, pit, or nest.

Snake Adaptations and Characteristics

  • Snakes differ from legless lizards: snakes have complete belly scales, forked tongues, and ears inside the body; legless lizards have divided belly scales, no forked tongues, and external ears.
  • The Green Anaconda is the heaviest snake, growing over 29 feet, weighing over 550 lbs, and measuring 12 inches in diameter.
  • Titanoboa, an extinct species, could reach lengths of 40-43 feet.

Habitat and Distribution

  • Sea snakes inhabit the Indian and Pacific Oceans and waters around Florida.
  • Terrestrial snakes are absent from Antarctica, Iceland, Ireland, Greenland, and New Zealand.
  • There are approximately 3,600 snake species worldwide, with 600 being venomous.

Venomous Snakes

  • 200 venomous species can kill or seriously injure humans.
  • 20 venomous snake species are found in the United States, with Alaska being the only state without a venomous species.
  • Connecticut has 14 snake species, including two venomous: Timber rattlesnake and Copperhead.

Ectothermic Characteristics

  • Ectotherms rely on external environmental conditions for body temperature regulation, making them "cold-blooded."
  • They utilize sunlight, water, air, and heat lamps for temperature control.
  • Ectotherms require five times more food than endotherms of the same size due to their lower metabolic rate.

Behavioral and Physiological Adaptations

  • Ectothermic adaptations include movement to shelters, basking, and hibernaculum—a rare gathering of snakes.
  • Hypothermia occurs when body temperature drops too low, while hyperthermia results from overheating.
  • Vasoconstriction occurs to retain body heat, while vasodilation helps cool the body by increasing blood flow to the skin.

Feeding and Digestion

  • Snakes can go 1-2 weeks without food, with some surviving up to six months.
  • Snakes primarily follow nocturnal (active at night) or crepuscular (active at dawn/dusk) patterns.
  • Nonvenomous snakes kill prey by swallowing them alive or constricting them.

Sensory Adaptations

  • Snakes have poor hearing, relying on internal ear structures to detect motion and vibrations.
  • Pit organs enable snakes to sense heat from warm bodies, enhancing their hunting ability in the dark.
  • Jacobson's organ decodes odor particles, allowing snakes to smell using their moist tongues.

Skin and Shedding

  • Snakes have keratin-filled scales that prevent water loss, with all scales present at birth.
  • Ecdysis refers to the shedding of skin, which occurs as snakes grow, facilitated by oil production.
  • The rattle of a rattlesnake is made of hollow, interlocked segments, with the oldest part called the birth button.

Advantages and Disadvantages of Ectothermy

  • Ectotherms benefit from having lower metabolic rates and conserving energy as they do not need to regulate body temperature actively.
  • Disadvantages include risks of hypothermia, hyperthermia, and dependence on the environment for temperature control.

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Test your knowledge about snakes with these flashcards. Explore definitions, classifications, and their relation to other reptiles. Perfect for anyone interested in herpetology or general biology.

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