quiz 1n2
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Quiz 1 - chemistry, cells and organs
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Lee Vang (username: vanglee2)To Submissions
Attempt 1
Written: Sep 23, 2011 9:10 AM - Sep 23, 2011 9:32 AM
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chemistryQuestion 1 2 / 2 pointsA molecule is
a combination of two or more atoms.
less stable than it's constituent atoms separated.
electrically charged.
a carrier of one or more extra neutrons
none of these
chem of lifeQuestion 2 2 / 2 pointsIn warm-blooded animals such as humans, which of these is most important for regulating the rate of chemical reactions?
changing concentration of reactants
changing temperature
changing concentration and activity of enzymes catalyzing the reaction
nature of reacting substances - carbohydrates react faster than lipids, for example
changing concentration of substrates
Question 3 2 / 2 points
21831205368335
The basic building block of proteins is a(n) _____
polysaccharide
phospholipid
steroid
amino acid
monosaccharide
osmosis etcQuestion 4 0 / 2 pointsDoes the concentration of Na+ and Cl- ions affect the diffusion of glucose molecules?
No
Yes
cells tissues
Question 5 2 / 2 pointsThe organ system that consists of glands such as the pituitary and thyroid glands and is a major regulatory system is the _____ system.
cardiovascular
skeletal
digestive
integumentary
endocrine
Question 6 2 / 2 pointsGlands that produce hormones belong to the _____ system.
cardiovascular
digestive
immune
urinary
endocrine
Question 7 2 / 2 pointsWhich of the following is FALSE regarding epithelial tissue?
might be found lining hollow organs
characterized by its extracellular matrix
connected to an underlying connective tissue
rich in blood vessels
might regulate absorption of materials
Question 8 2 / 2 pointsWhich of the following is not a primary tissue type?
lung
muscle
nervous
epithelial
connective
Question 9 2 / 2 pointsWhich of the following substances is most likely to passively diffuse across the plasma membrane by dissolving in the membrane?
an ion
a nonpolar molecule
a polar molecule
simple sugars
amino acids
homeostasisQuestion 10 0 / 2 pointsThe study of the body's organization that considers the heart, blood and all of the associated blood vessels as a unit is called _____.
systemic anatomy
regional anatomy
surface anatomy
physiology
anatomical imaging
chemistryQuestion 1 2 / 2 pointsAfter a neutral atom looses an electron in chemical bonding, it becomes _____.
postively charged
negatively charged
polar covalent
a molecule
more than one of these
chem of lifeQuestion 2 2 / 2 pointsUracil is a type of _____.
amino acid
triglyceride
fatty acid
nucleotide
carbohydrate
Question 3 2 / 2 pointsA chemical capable of maintaining the pH of a solution nearly stable is called a(n) _____.
acid
base
salt
catalyst
buffer
osmosis etcQuestion 4 2 / 2 pointsConsider a molecule of glucose and a molecule of glycogen at the outer edge of the cytoplasm. Now considering only diffusion,which one would be expected to reach a distant site within the cell sooner?
glucose
glycogen
they would arrive at the same time
cells tissuesQuestion 5 2 / 2 pointsWhich tissue type is specialized for contraction?
simple squamous
simple columnar
areolar
dense connective
muscle
Question 6 2 / 2 pointsThe rough ER is a membranous system associated with _____.
chromosomes
lysosomes
microfilaments
ribosomes
vacoules
Question 7 2 / 2 pointsThe organ system that consists of the skin, hair, and nails and protects the body and prevents water loss is the _____ system
cardiovascular
skeletal
digestive
integumentary
endocrine
Question 8 2 / 2 pointsSimple epithelial tissues consist of _____ layer(s) of cells.
1
2
3
4
5
Question 9 2 / 2 points
The basic living unit of all life is the _____.
organ
cell
organelle
organ system
tissue
homeostasisQuestion 10 2 / 2 pointsThe organ system that maintains tissue fluid balance, filters foreign material from blood and lymph, absorbs fats from the digestive tract, and combats disease is the _____ system.
cardiovascular
endocrine
lymphatic
respiratory
urinary
Quiz 2 - skin
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Lee Vang (username: vanglee2)To Submissions
21831205368444
Attempt 1
Written: Sep 25, 2011 6:16 PM - Sep 25, 2011 6:34 PM
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skinQuestion 1 2 / 2 pointsThe structures that produce and excrete an oil onto hair shafts are called _____ glands.
sebaceous
sudoriferous
oil glands
water
ceruminous
Question 2 0 / 2 pointsWhich layer of skin contains blood vessels, nerves, glands, and connective tissue?
epidermis
dermis
hypodermis
squamous epithelium
serous membrane
Question 3 2 / 2 pointsWhich of the following occurs when a person tans?
their keratinized layer gets thicker
their melanocytes reproduce
more melanin is produced and distributed to keratinocyte
the type of melanin produced changes to a darker pigment
the melanocytes move from the stratum spinosum to the stratum corneum
Question 4 2 / 2 points
Albinism is the result of the inability to produce _____.
keratin
vitamin D
melanin
sweat
cerumen
Question 5 0 / 2 pointsWhich of the following layer contain cells completing stages of mitosis?
stratum corneum
stratum granulosum
stratum lucidum
stratum spinosum
Question 6 2 / 2 pointsWhat might be a result if arrector pili muscles failed to contract and relax?
a person's ability to sweat might decrease
the skin might become dry due to lack of oil
the person may have a decreased ability to regulate body temperature
the person might have the same skin color regardless to sun exposure
the person would be able to produce sweat, it just wouldn't reach the surface of the skin as easily
Question 7 2 / 2 points
The outer most layer of the skin (epidermis) is composed mostly of _____ tissue.
connective
muscular
epithelial
nervous
an even blend of
Question 8 2 / 2 points
What structure is identified at the tip of the arrow labeled B?
hair follicle
hair shaft
pore
sebaceous gland
sudoriferous gland
Question 9 2 / 2 pointsSkin color is determined by _____.
the amount of melanin present
the amount of carotene present
the amount of blood flow
a person's genetics
all of these are correct
Question 10 2 / 2 points
What structure is identified at the tip of the arrow labeled D?
hair follicle
hair shaft
pore
sebaceous gland
sudoriferous gland
Attempt 2
Written: Sep 25, 2011 6:35 PM - Sep 25, 2011 6:43 PM
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skin
Question 1 2 / 2 points
Which layer of epidermis is most superficial?
stratum basale
stratum corneum
stratum granulosum
stratum lucidum
stratum spinosum
Question 2 2 / 2 points
The outer most layer of skin is called the _____.
epidermis
dermis
hypodermis
body membrane
serous membrane
Question 3 2 / 2 points
The sebaceous and sudoriferous glands are specializations of what type of tissue?
epithelial
nervous
connective
muscle
Question 4 2 / 2 points
The hypodermis is mostly _____.
skin
melanocytes
keratinocytes
adipose tissue
chondrocytes
Question 5 2 / 2 points
Which layer of epidermis is the deepest?
stratum basale
stratum corneum
stratum granulosum
stratum lucidum
stratum spinosum
Question 6 2 / 2 points
The sweat and oil glands of the skin are called _____ glands.
endocrine
exocrine
Question 7 0 / 2 points
The outer most layer of the skin (epidermis) is composed of _____.
sebaceous glands
keratinized cells
hair follicles
sweat glands
loose connective tissue
Question 8 2 / 2 points
Sebaceous glands are associated with _____.
pacinian corpuscles
Meissner corpuscles
hair follicles
the bed of nails
nail plate
Question 9 2 / 2 points
What structure is identified at the tip of the arrow labeled C?
hair follicle
hair shaft
pore
sebaceous gland
sudoriferous gland
Question 10 2 / 2 points
What structure is identified at the tip of the arrow labeled E?
hair follicle
hair shaft
pore
sebaceous gland
sudoriferous gland
skinQuestion 1 2 / 2 pointsThe hypodermis is mostly _____.
chondrocytes
fibroblasts
erythrocytes
adipocytes
osteocytes
Question 2 2 / 2 pointsWhich of the following is most correct according to your lab manual and text book?
The hypodermis is the inner most layer of skin
The hypodermis is not part of the skin
Hair follicles begin in the hypodermis
Keratinization occurs in the hypodermis
The hypodermis is the muscular layer under the skin
Question 3 2 / 2 points
From a physiological perspective, why are the outer layers of the epidermis composed of dead cells?
when skin cells get old, they die
these cells do not have a source of blood flow to keep them alive
nitrogen gas in atmospheric air is toxic to them
keratin kills the cells
ultraviolet (UV) rays from the sun kill the cells
Question 4 2 / 2 points
Which of the following secretes oil?
sebaceous glands
keratinized cells
free nerve endings
sweat glands
sudoriferous glands
Question 5 0 / 2 pointsFingerlike projections of the dermis that contain loops of capillaries and neural receptors are called _____.
nodules
dermal papillae
polyps
pili
cilia
Question 6 2 / 2 pointsThe structures that produce and excrete a watery solution to the surface of the skin are called _____ glands.
sebaceous
sudoriferous
oil glands
water
ceruminous
Question 7 2 / 2 pointsOne would find relatively few sebaceous glands in _____ skin.
facial
thick
thin
keratinized
tan
Question 8 0 / 2 pointsWhich layer contains melanocytes?
stratum basale
stratum corneum
stratum granulosum
stratum lucidum
stratum spinosum
Question 9 2 / 2 pointsWhich type of cell has the primary function of making the skin water tight?
keratinocyte
cytoplasm
melanocyte
chondrocyte
osteocyte
Question 10 0 / 2 pointsWhich type of cell attempts to protect the skin and body from ultraviolet radiation?
keratinocyte
cytoplasm
melanocytes
squamous epithelial cells
collagen
skinQuestion 1 2 / 2 pointsThe arrector pili muscle is _____ muscle.
skeletal
smooth
cardiac
Question 2 2 / 2 pointsWhere are ceruminous glands found?
scalp
epidermis
dermis
palms of hands and feet
external auditory canal
Question 3 0 / 2 pointsWhich layer contains predominately keratin?
stratum basale
stratum corneum
stratum granulosum
stratum lucidum
stratum spinosum
Question 4 2 / 2 pointsAnother name for the hypodermis is _____.
dermal papilla
sebaceous
sudoriferous
subcutaneous layer
keratinized layer
Question 5 2 / 2 pointsMeissner corpuscles are found in the _____.
cortical layer
stratum corneum
stratum basale
papillary layer
reticular layer
Question 6 0 / 2 pointsPacinian corpuscles are found in the _____.
cortical layer
stratum corneum
stratum basale
papillary layer
reticular layer
Question 7 2 / 2 points
What structure is identified at the tip of the arrow labeled A?
hair follicle
hair shaft
pore
sebaceous gland
sudoriferous gland
Question 8 0 / 2 pointsWhich structure or region is most superficial?
sebaceous gland
hair follicle
dermal papillae
arrector pili muscle
sweat gland
Question 9 2 / 2 pointsMeissner corpuscles function to _____.
sense heat
sense touch
produce melanin
produce keratin
nourish
Question 10 2 / 2 pointsWhat might cause the contraction of arrector pili muscles?
flexing the elbow
adduction
cool weather
sweating
activation of melanocytes
Question 1 2 / 2 pointsWhich structure or region is most superficial?
sebaceous gland
hair follicle
epidermis
hypodermis
sweat gland
Question 2 2 / 2 pointsWhich layer, when referred to in combination with the startum basale, is called the stratum germinativum.
stratum basale
stratum corneum
stratum granulosum
stratum lucidum
stratum spinosum
Question 3 2 / 2 pointsWhat type of tissue is the epidermis?
squamous epithelium
columnar epithelium
muscle
nervous
adipose
Question 4 2 / 2 pointsOne would find relatively few sebaceous glands in the skin of the _____.
neck and face
back and shoulders
chest
forehead
palms of hands and feet
Question 5 2 / 2 pointsWhich layer is found only in thick skin?
stratum basale
stratum corneum
stratum granulosum
stratum lucidum
stratum spinosum
Question 6 2 / 2 pointsWhich structure or region is most superficial?
sebaceous gland
hair follicle
dermal papillae
arrector pili muscle
sweat gland
Question 7 2 / 2 pointsSkin color is determined by _____.
the amount of melanin present
the amount of carotene present
the amount of blood flow
a person's genetics
all of these are correct
Question 8 2 / 2 pointsThe arrector pili muscle is _____ muscle.
skeletal
smooth
cardiac
Question 9 2 / 2 pointsThe hypodermis is mostly _____.
chondrocytes
fibroblasts
erythrocytes
adipocytes
osteocytes
Question 10 2 / 2 pointsThe sebaceous and sudoriferous glands are specializations of what type of tissue?
epithelial
nervous
connective
muscle