Shark Senses
Terms
undefined, object
copy deck
- What are the 6 senses of a shark?
-
1. Touch
2. Taste
3. Hearing
4. Sight
5. Water Pressure
6. Electricity - A shark's primary sense is a keen sense of ________.
- Smell
- What is the ratio of the minimum number of drops of blood to the number of drops of water the blood is found in, for a shark to trace?
- 1:1000000
- How far away can a shark trace a scent of blood?
- .25 mile
- Where are a shark's paired nostrils found?
- The underside of its snout.
- How does the the shark get its olfactory information?
- Water continually flows through the nostrils.
- How is the job of a shark's nostrils different than ours?
- Shark's nostrils is for scent only, while ours is connected to the mouth so we can breathe too.
- What are nasal barbels?
- Whisker-like feelers used to taste and feel.
- What are the manin parts of a shark's eye?
- Spherical lens, a cornea, a retina, an iris, and a pupil.
- What animal's eyesight is a shark's most similair? And why?
- Like cats who also see well in dim light.
- What is the tapetum lucidum?
- A mirror-like layer in the back of the eye.
- What does the tapetum lucidum do?
- It doubles the intensity of incoming light, enhancing light sensitivity.
- How is a shark's pupils unlike other fish's?
- It can dilate and contract to control the amount of incoming light.
- Why are sharks very sensitive to small differences in light intensity?
- The retina has a greater proportion of rods (light intensity sensors) than cones (color sensors).
- What is a a nictitating membrane and what does it do?
- A type of eyelid that protects the eye during hunting.
- What is the difference between the eyes of sharks that live in different depths of the ocean.
- Sharks that live deeper in the oceans usually have larger eyes than those that live nearer the surface.
- Why is the fact that sharks can detect electricity important?
- It is emitted in small amounts by every living animal including the prey or the shark.
- Sharks have a special network of jelly-filled canals in their head called the _______________that detect electric fields.
- Ampullae of Lorenzini
- What does the Ampullae of Lorenzini do?
- Lets the shark pick up weak electrical stimuli from the muscle contractions of animals.
- How does a shark navigate?
- It detects magnetic fields to determine which way to travel.
- Sharks can sense vibrations in the water using __________ _________.
- The lateralis system
- What are the lateralis system?
- It's a network of neuromasts, fluid-filled vessels, that run along a shark's body under the skin along the length of a shark.
- What does the the lateralis system do?
- Many small pores open up on the skin and detect the intensity and direction of vibrations in the water.
- How does this help the shark?
- The shark can detect injured fish (easy prey) that are thrashing around in the water.
- Sharks are very sensitive to ___ frequency sounds and have good directional hearing.
- Low
- What serves as a shark's external "ears"?
- The endolymphatic pores on the top of a shark's head.
- Where is a shark's tastebuds found?
- Sharks have taste buds in the mouth but not in their tongue.
- A shark's tongue is called a __________.
- basihyal
- What is a basihyal?
- A small, thick, relatively immovable piece of cartilage that is found on the floor of the mouth of sharks and fishes.(It's tongue.)
- What is the only shark that uses its tongue and why?
- The cookiecutter sharks use it to suk the guts out of its prey.