week 8 review

Question 1

What is the function of the digestive system

Answer 1

A body cavity or tube that mechanically and chemically breaks food down to small particles, then into molecules that can be absorbed into the internal environment

Question 2

What is a complete digestive system?

Answer 2

A tubular gut with an opening at both ends (i.e frogs, birds)

Question 3

What is an incomplete digestive system?

Answer 3

A saclike gut with an opening in the body surface for food to enter and waste to leave (i.e flatworm)

Question 4

Which gland is responsible for chemical digestion in the mouth?

Answer 4

The salivary glands (exocrine) are responsible for chemical break down.

Question 5

What is heterodonty?

Answer 5

Many different teeth

Question 6

What does peristalsis refer to?

Answer 6

the contraction and propelling movement of the muscular walls of the gastrointestinal (GI) tract.

Question 7

What are sphincters?

Answer 7

Used in many different parts of the body;

Sphincters prove effective in the mediation of the entrance or release of liquids and solids.

Question 8

what is the main function of the small intestine?

Answer 8

The main function of the small intestine is absorption of nutrients and minerals from food.

Question 9

What does the microvilli do? the brush bush?

Answer 9

The microvilli are many folds and lining that increases the surface area for absorption in the small intestine, the brush bush are cells that function in both digestion and absorption

Question 10

The main function of the stomach

Answer 10

is to break down and digest food in order to extract necessary nutrients from what you have eaten. Entrance of food into this organ and exit of chime from this organ are regulated by sphincters.

Question 11

What is the main function of the large intestine?

Answer 11

is to absorb water from the remaining indigestible food matter and transmit the useless waste material from the body

Question 12

What does the epiglottis do?

Answer 12

Prevents food and other substances from entering the trachea

Question 13

What synthesizes and is released by the liver?

Answer 13

bile

Question 14

What is the main function of the gallbladder?

Answer 14

Stores bile which helps the body break down and digest fats that you eat.

Question 15

What is the dual function of the pancreas?

Answer 15

endocrine: hormone-producing
exocrine: enzymes for digestion

Question 16

Hydorstatic skeleton?

Answer 16

An enclosed fluid that contracting muscles act upon (earthworms, sea anemones)

Question 17

Exoskeleton

Answer 17

a hardened external skeleton (mullo

Question 18

endoskeleton

Answer 18

an internal skeleton (vertebrates)