AnswersQ5 Biology 2014Lab: Blood Typing

Lab: Blood Typing — Unit test Answers

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Which of the following describes the epididymis?

A
a tube that transports sperm to the urethra
B
a vesicle that produces fluid and gives sperm nourishment and motility
C
a gland that contributes fluid to semen
D
a tube that stores and develops sperm cells from the testes
22
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How does the structure of the alveoli allow for its function of gas exchange?

A
Alveolar sacs have space to hold mucus that makes gas exchange easier.
B
Alveolar sacs rely on valves to ensure that air flows only in one direction.
C
Alveolar sacs are located within muscles that contract, which increases gas exchange.
D
Alveolar sacs are surrounded by thin capillaries where gases can be exchanged.
23

Which of the following starts to break down as soon as they enter the mouth?

A
carbohydrates
B
proteins
C
fats
D
nucleic acids
24

The pharynx is the structure in the body that serves as a pathway of both air and food. How does the body make sure that food does not get into the lungs?

A
The salivary glands secrete enzymes that pull food out of the air pathway.
B
The small intestine pushes the air out of the digestive system.
C
The pancreas breaks down food in the air pathway.
D
The epiglottis closes the air pathway so that food will not enter it.
25

What would cause antibodies to attack the cells of the body?

A
The cells support bacterial growth.
B
The cells are worn out and need to be replaced.
C
The antibodies mistakenly identify the cells as foreign material.
D
The red blood cells are malfunctioning.

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