Lab 9

Question 1

Digestion in most animals is

Answer 1

Extracellular

Question 2

Food is swallowed into some type of digestive cavity that is connected by some sort of passageway to outside the animal’s body. Once in the digestive cavity, food is subjected to enzymatic breakdown and only then can the now solvable nutrients be absorbed into the surrounding cells

Answer 2

EXTRACE3LLULAR

Question 3

In protozoa digestion is (x) because food is brought directly in the cell by a type of endocytosis

Answer 3

Intracellular

Question 4

The plasma membrane encircles the food particle until it is completely enclosed within a food vacuole. Once within the cytosol, the food vacuole fuses with a lysosomes. As the enzymes hydrolysis the food, soluble end products are absorbed across the food vacuolar membrane into the cytosol.

Answer 4

Phagocytosis

Question 5

A membranous organelle that contains digestive enzymes

Answer 5

Lysosomes

Question 6

When digestion is completed, the food vacuole fuses with the plasma membrane, expelling undigested contents and waste into the environment through

Answer 6

Exocytosis

Question 7

-owe

Answer 7

Sugar

Question 8

Pep-

Answer 8

Amino acids (proteins)

Question 9

Ciliates are named because of the abundance of

Answer 9

Hairlike appendages covering the surfaces of these organisms

Question 10

The oar like action of the cilia is used for both

Answer 10

Locomotion and feeding

Question 11

Some of the most complex unicellular organisms

Answer 11

Ciliates

Question 12

Controls the production of messenger RNA and protein synthesis, growth, and asexual reproduction

Answer 12

Macronucleus

Question 13

Essential for conjugation

Answer 13

Micronucelus

Question 14

Sexual process in ciliates

Answer 14

Conjugation

Question 15

The outer surface of ciliates, reinforced plasma membrane that maintains the shape of the organisms but still exhibits a degree of flexibility

Answer 15

A pellicle

Question 16

Found particularly in freshwater forms and act as pumps that constantly squeeze out excess water form the cell’s interior

Answer 16

Contractile vacuoles

Question 17

Lys

Answer 17

Split

Question 18

Some

Answer 18

Body

Question 19

Food particles are swept along in water currents created by the beating action of cilia that line a

Answer 19

Buccaneers cavity

Question 20

Buccal cavity

Answer 20

Oral groove

Question 21

Within the buccal cavity there is a distinct opening the (x) that opens into a passageway called the (x)

Answer 21

Cytosome, cytopharynx

Question 22

Cell mouth

Answer 22

Cytosome

Question 23

Cell throat

Answer 23

Cytopharynx

Question 24

As food stuff accumulates at the bottom of the cytopharynx, a (x) forms

Answer 24

Food vacuole

Question 25

As the food vacuole moves in the cytosol, a (x) fuses it

Answer 25

Lysosome

Question 26

As digestion proceeds, the food vacuole circulates throughout the cytosol and the solvable products of digestion diffuse across the

Answer 26

Membrane throughout the cell’s interior

Question 27

When digestion is complete, the food reaches a region of the cell surface called the

Answer 27

Anal pore

Question 28

The vacuole becomes attached to the (x), ruptures, and releases its contents of wastes and undigested remains to the extioror

Answer 28

Anal pore

Question 29

the passage by which food passes from the mouth to the stomach; the esophagus.

Answer 29

Gullet

Question 30

The anal opening in a unicellular organism.

Answer 30

Cytoproct