Quiz 1 - chemistry, cells and organs

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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