Bio Ch. 39 Study Guide

Terms	Definitions
factors of fish	streamlined shape, muscular tail, paired fins, unpaired fins, mucus, control amount of gas, lipids, scales
freshwater fish	_______ _______ are hypertonic to their environment (gain water; lose ions)
saltwater fish	______ _______ are hypotonic to their environment (lose water; gain ions)
sensory functions	______ _______ of a fish include chemoreception, lateral line, and ampullae of Lorenzi
chemoreception	ability to detect chemicals in environment; taste and smell
lateral line	allows some fish to detect vibrations in water
ampullae of Lorenzi	detect weak electrical fields
hagfish	_______ characteristics: live in ocean; bottom dwellers; no vertebrae; isotonic to environment; have two moveable plates and a rough tonguelike structure
lamprey	_______ characteristics: 1/2 freeliving and 1/2 parasitic; have disk shaped mouth and rough tongue; makes a chemical to keep host's blood from clotting; live in ocean, river, or lake; external fertilization; eggs hatch into larvae
ray	has a diamond or disk shaped body
skate	has a triangular body
characteristics of bony fish	bone; lungs or swim bladder; scales
bony fish skeleton	skull; spinal column; pectoral girdle; pelvic girdle
swim bladder	allows fish to change their vertical position in the water by regulating the amount of gas in this organ
forebrain	part of brain with olfactory bulbs and cerebrum
midbrain	part of brain with optic tectum
hindbrain	part of brain with cerebellum and medulla oblongata

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17 terms