LECTURE 16

Question 1

The word preferred over flora?

Answer 1

microbiota

Question 2

When do normal flora become harmful

Answer 2

conditions of unusual host susceptibility

Question 3

The normal flora include?

Answer 3

bacteria, fungi, protozoa, viruses

Question 4

microbes that do not persist in an area of the body are called?

Answer 4

transients

Question 5

which components of the body do not have normal flora?

Answer 5

interior organs, blood

Question 6

normal microbiota refer to?

Answer 6

the collection of microbes that inhabit certain parts of the body

Question 7

The parts of the subcutaneous skin consist of ?

Answer 7

epidermis, dermis, hypo dermis

Question 8

Parts of the skin that open to the surface?

Answer 8

sweat glands, sebaceous glands, hair follicles

Question 9

parts of the that body contain non pathogenic the myobacterium species ?

Answer 9

external ear, axillae, genital area

Question 10

What is the PH of skin secretions?

Answer 10

4-6 (acidic)

Question 11

what type of acidophiles are the normal microbiota ?

Answer 11

Mild Acidophiles

Question 12

underarm odour is caused by?

Answer 12

bacterial action on secretions from the sweat and sebaceous glands

Question 13

how do you prevent underarm odour?

Answer 13

1. ) destroying bacteria present

2. ) decreasing the flow of perspiration from the sweat glands.

Question 14

why can’t the skin support large microbial communities ?

Answer 14

To Dry.

Question 15

Inoculated bacteria can’t survive on the skin because?

Answer 15

1. ) to dry
2. ) acidic PH
3. ) can’t compete with normal flora
4. ) bacterialcidal nature of skin secretions

Question 16

the skin of a fetus is usually sterile? True or False

Answer 16

True

Question 17

When does the skin of the fetus become infected ?

Answer 17

during the birth process

Question 18

What are the parts of the digestive tract?

Answer 18

mouth, esophagus, stomach, small intestine, colon, rectum.

Question 19

what are the ways that microbes can enter the mouth?

Answer 19

food, air, water, any object put into the mouth.

Question 20

A thin coating that can develop on the surface of the teeth?

Answer 20

dental plaque

Question 21

dental plaque is made of?

Answer 21

organic materials and microbial cells.

Question 22

what is the name of the bacteria found in dental plaque?

Answer 22

streptococcus mutans

Question 23

what is the action of streptococcus mutans on the teeth?

Answer 23

converts sugars to lactic acid which removes calcium from the tooth structure.

Question 24

removal of calcium from the tooth structure causes what to form on tooth?

Answer 24

cavity/ carie

Question 25

What is the action of fluoride on the teeth?

Answer 25

makes it more resistant to attack by the acid

Question 26

what are the parts of the gastrointestinal tract?

Answer 26

stomach, small intestine, large intestine

Question 27

What is the PH of gastric juice ?

Answer 27

2

Question 28

the healthy stomach has a normal stomach? True or False

Answer 28

False

Question 29

Which bacteria can cause stomach ulcers and chronic gastritis ?

Answer 29

Heliobacter pylori (gram negative curved rod)

Question 30

what is the classification of the intestinal bacteria ?

Answer 30

anaerobes or facultative anaerobes

Question 31

What is the most abundant bacteria species in feces?

Answer 31

Bacteroides Species

Question 32

What is the classification of the Bacteriodes Species ?

Answer 32

gram negative, obligately anaerobic , pleomorphic rods

Question 33

external factors that can influence composition of intestinal flora?

Answer 33

diet, and antibiotic therapy

Question 34

the lower small intestine and large intestine are alkaline/ true or false?

Answer 34

TRUE