chapter 41 section 3 Flashcards Preview

Biology > chapter 41 section 3 > Flashcards

Flashcards in chapter 41 section 3 Deck (18):
1

swim bladder

gas filled sac used to control bouyancy

2

urinary bladder

urine is stored and later expelled from here

3

lobe finned fish

fleshy fins supported by series of bones with central axis

4

ray finned fish

fins supported by long segmented flexible bony elements.

5

gallbladder

stores bile and releases it into the intestine

6

pancreas

releases digestive enzymes into the intestine.

7

cranial nerve

the major sensory organs are connected with the brain by this cord

8

spinal nerve

connects spinal cord with internal organs

9

One of the functions of the scales on a bony fish is to

help reduce water resistance

10

The coelacanth is an example of a

lobe finned fish

11

The part of a fish’s digestive tract that secretes bile is the

liver

12

In a fish, the blood that leaves the heart goes first to the

gills

13

Fish gills are efficient organs for gas exchange because they

operate on the principle of countercurrent flow

14

Explain how the scales of a bony fish can be sued to estimate the age of those fishes

annual variations in food = good approximation of age through scales

15

What two organs are involved in maintaining water and ion balance in a bony fish?

kidney and gills

16

How does a bony fish adjust its buoyancy?

varying the amount of gas in its swim bladder

17

Where does fertilization occur in bony fishes?

externally in most species
internally in some species

18

Why would a fish with faulty valves in its conus arteriosus probably suffer
from a lack of energy?

Faulty valves would allow blood to flow back into
the ventricle, making delivery of blood to the gills
less efficient. Body cells would therefore receive
less oxygen and make less ATP.