exam 3

Question 1

T/F? You are a single-celled organism

Answer 1

false

Question 2

T/F? Bitter is one of the four basic taste groups

Answer 2

true

Question 3

T/F? You are able to sense sound

Answer 3

true

Question 4

T/F? Muscle tissue serves as a protective outer covering to body surfaces

Answer 4

false

Question 5

T/F? Mechanoreceptors are sensitive to light

Answer 5

false

Question 6

T/F? Your digestive system is involved in eating

Answer 6

True

Question 7

what is the correct hierarchy of organization in multicellular organisms

Answer 7

cell -> tissue -> organ -> organ sytem -> organism

Question 8

hearing plays a role in

a. ) balance
b. ) your sensitivity to heat
c. ) taste
d. ) mitosis

Answer 8

a. balance

Question 9

the two point threshold on your fingertip is ___ the two point threshold on the back of your hand

Answer 9

less than

Question 10

which of the following organ systems is primarily involved with eliminating wastes and regulating salts

a. ) circulatory system
b. ) immune system
c. ) digestive system
d. ) endocrine system
e. ) excretory system

Answer 10

e.) excretory system

Question 11

blood, fat, and muscles are examples of ___

Answer 11

tissues

Question 12

the ___ is located at the back of the eye where the optic nerve exists to the brain, and marks a location that has no rods or cones

a. ) thermo-core
b. ) CNS
c. ) olfactory center
d. ) blind spot

Answer 12

d.) blind spot

Question 13

being large has its benefits, but unicellular organisms are limited in how large they can grow because theor volume increases in size faster than their surface. Which of the following evolved as a solution to overcome this limitation

Answer 13

multicellularity

Question 14

which two organ systems play a large role in getting O2 to all of your cells and getting rid of excess CO2

Answer 14

circulatory and respiratory

Question 15

your heart is composed of how many chambers

Answer 15

4 chambers

Question 16

the smallest blood vessels are called

Answer 16

capillaries

Question 17

The left ventricle has the most muscle surrounding it because

Answer 17

it has to be stronger to pump blood to the entire body

Question 18

carries oxygen-rich blood from the heart to the body

Answer 18

aorta

Question 19

small sacs in lungs where CO 2 and O2 are exchanged betweeen lungs and blood

Answer 19

alveoli

Question 20

pumps oxygen-rich blood to left ventricle

Answer 20

left atrium

Question 21

carries oxygen-poor blood from the body to the heart

Answer 21

vena cava

Question 22

caused by a damaged valve between an atrium and a ventricle

Answer 22

heart murmur

Question 23

small blood vessels where CO2 and O 2 are exchanged between blood and the body

Answer 23

capilaries

Question 24

helps reduce the risk of heart disease

Answer 24

regular excersise

Question 25

carries oxygen-rich blood from the lungs to the heart

Answer 25

pulmonary vein

Question 26

___ is a virus that attacks the immune system, and __ is a subsequent suite of opportunistic diseases that infect the body due to a comproimised immune system

Answer 26

HIV, AIDS

Question 27

T/F? If a person got HIV today and was tested for HIV next week, the result might be negative because the level of virus in his or her body would be too low to detect

Answer 27

True

Question 28

DNA fragments move through a DNA gel at different rates

Answer 28

due to the size of the different DNA fragments

Question 29

T/F? DNA is made up of many molecules called nucleotides

Answer 29

TRUE

Question 30

T/F? In the United States, HIV only spreads by male-male sexual contact

Answer 30

FALSE

Question 31

T/F? Behavioral ecology is the study of behavior whithin the context of evolution

Answer 31

FALSE

Question 32

T/F? A rapid involuntary response to a stimulus, such as jumping when startled, is an insight learning behavior

Answer 32

FALSE