bio test 3

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what are the properties of primary growth?

elongation, it occurs in plants that live only one year, they have apical meristems, and it increases plant exposure to light.

Which of these ions is most likely to be leached from the soil?

- charged, soil tends to be negatively charged so the negatively charged ions tend to run off

what are the properties of secondary growth?

grow in thickness, has cork cambium and vascular cambium, lateral meristem, increases vascular flow, and provides structural support

what is a property of both secondary and primary growth?

they both occur in plants that live more than one year

what does the zone of cell division include?

apical meristem and adds new cells

what does the zone of elongation include?

it is the place where cells elongate and push the root tip further into the soil

what does the zone of differentiation include?

also known as the zone of maturation, where cells can differentiate into distinct cell types and can become vascular, dermal, or ground tissue types.

trees grow well in___ conditions

wet or warm

tree rings are small in diameter when conditions are _____

cold or dry

Water and ions can travel into the root by moving between cells or along cell walls is called what___

apoplastic route-

Water and ions can travel into the root by moving from cell to cell via plamsodesmata

symplastic route

Even water and ions that are traveling by the apoplastic route must eventually pass through cells, because of a waxy waterproof band called the___

Casparian strip.

In roots the _____ forces water and solutes to pass through the plasma membranes of _____ cells before entering the _____.

casparian strips, endodermis, xylem

_____ provide(s) the major force for the movement of water and solutes from roots to leaves.

transpiration

what causes water molecules to stick together?

hydrogen bonds (cohesion)

what are guard cells?

cells that control the rate of water loss from the leaf

what is the mesophyll?

cells where most of the evaporation of water occurs in the leaf

what is the purpose of the lower and upper epidermis?

they are cells with a coating that prevent evaporation of water

what is a vein or vascular bundle's purpose?

a group of different cell types involved in long distance transport of water and nutrients

Symplastic pathways involves___

moving water via plasmodesmata, and can allow water to enter vacuoles in cells

apoplastic flow involves_____

involves water flow outside the protoplast, consists of a porous mixture of hydrophilic polymers

neither apoplastic or symplastic pathways involve

the passage of multiple cell membranes

what is the order of events that occur after water exits the xylem?

exits the xylem and enters the walls of the surrounding cells, then it spreads as a film on the surface of mesophyll cells, then it diffuses through the air spaces of the leaf, then it exits through the stomata

Plants must always compromise between ________ and __________.

maximizing photosynthesis and water loss

mycorrhiza and plants have what type of relationship?

mutualistic associations between plant roots and fungi.

The proton pump _____

uses the energy stored in ATP to produce a hydrogen ion gradient

A plant cell placed in a solution with a lower water potential will _____

lose water and plasmolyze.

Which of the following is a correct statement about a difference between xylem and phloem transport?

Xylem sap moves up; phloem sap moves up or down.

A student is performing a chemical analysis of xylem sap. This student should not expect to find much a) water b) nitrogen c) potassium d) sugar e) phosphorus.

sugar. phloem transports sugar

what is the driving force of guttation?

root pressure

Xerophytes minimize water loss by _____

using the CAM pathway. they open the stomata at night to prevent heavy water loss

In addition to transporting sugar, the phloem also _____.

conduct electrical impulses, transport plant RNA throughout the plant, transport viral RNA, and transports proteins

soil particles are

negatively charged

Phosphorus is a ______ . What is its function for plants?

it is a macro. 0.2% H₂PO₄⁻, HPO₄²⁻,
component of nucleic acids. phospholipids, ATP , and several coenzymes

Chlorine is a ______ . What is its function for plants?

Cl⁻ micro. 0.001%
required for H₂O-splitting step of photosynthesis, function in H₂O balance

Sulfur is a ______ . What is its function for plants?

SO₄²⁻ 0.1% macro
component of proteins and coenzymes

Manganese is a ______ . What is its function for plants?

Mn²⁺ micro 0.005%
active in formation of amino acids, activates some enzyme; required for water-splitting step of photosynthesis

Iron is a ______ . What is its function for plants?

Fe³⁺, Fe²⁺ 0.01% micro
component of cytochrome; activates some enzymes

Magnesium is a ______ . What is its function for plants?

Mg²⁺ 0.2% macro
component of chlorophyll; activates many enzymes

Boron is a ______ . What is its function for plants?

H₂BO₃⁻ 0.002% micro
cofactor in chlorophyll synthesis; may be involved in carbohydrate transport and nucleic acid synthesis; role in cell wall function

Calcium is a ______ . What is its function for plants?

Ca²⁺ 0.05% macro
important in the formation and stability of cell walls and in maintenance of membrane structure and permeability; activates some enzymes; regulates many responses of cells to stimuli

nitrogen is a ______ . What is its function for plants?

NO₃⁻,NH₄⁺ 1.5% Macro
component of nucleic acids, proteins, hormones, chlorophyll, and coenzymes

Zinc is a ______ . What is its function for plants?

Zn²⁺, 0.002% micro
active in formation of chlorophyll; activates some enzymes

Potassium is a ______ . What is its function for plants?

K⁺ 1.0% macro
cofactor that functions in protein synthesis; major solute functioning in H₂O balance; operation of stomata

Nickel is a ______ . What is its function for plants?

Ni²⁺, 0.001% micro
cofactor for an enzyme functioning in nitrogen metabolism

Hydrogen is a ______ . What is its function for plants?

H₂O, 6% macro
MAJOR COMPONENTS OF PLANTS ORGANIC COMPOUNDS

Copper is a ______ . What is its function for plants?

Cu⁺, Cu²⁺ 0.001% mirco
component o f many redox and lignin-biosyntheitc enzymes

Carbon is a ______ . What is its function for plants?

CO₂ macro 45%
major component of plants organic compounds

oxygen is a ______ . What is its function for plants?

CO₂ macro 45%
major component of plants organic compounds

Molybdenum is a ______ . What is its function for plants?

MoO₄²⁻ micro 0.0001%
essential for symbiotic relationship with nitrogen fixing bacteria, cofactor in nitrate reduction

How do bacteria help plant growth?

they secrete chemicals to help stimulate growth, the help plants acquire nitrogen, make nutrients more available, and absorb toxic materials

all plants have what

they have mycorrihzal relationships and a rhizobacteria

What is nitrogen's role in plants?

plant roots cannot directly absorb N₂ from the atmosphere, it is a macronutirent, without it plants turn yellow, it is a component of nucleic acids, proteins, nitrogen fixing bacteria turn N₂ into NH₃, plant roots can only absorb nitrogen in the form of ammonium ions NH₄⁺ or nitrate ions NO₃⁻

What is topsoil?

It is a mixture of rock fragments, humus, and living organisms

Which of the following is a symptom of magnesium deficiency in plants?

chlorosis

what are the four types of tissues?

nervous, connective, muscular, and epithelial

what are the five different types of epithelial cells?

cubodial, simple columnar, psuedostratified ciliated Columnar, stratified squamos, and simple squamos

six major types of connective tissues are___

blood, adipose tissue, cartilage, loose connective tissue, fibrous connective tissue, and bone

nervous tissues are made of___

glia and neurons

three types of muscle tissue are___

skeletal, smooth, cardiac

cubodial epithelium is used for

specialized for secretion

simple columnar epithelium is used for

lining the intestines

psuedostratified ciliated columnar epithelial cells are used for

forms a mucous membrane (lines respiratory tract)

stratified squamous epithelial cells

line the outer surface of the skin and lines the insides of the esophagus, anus and vagina

simple squamous epithelial cells are used for

they are thin and leaky. they function in exchange of material via diffusion; lines blood vessels and air sacs of lungs

loose connective tissue does what?

its made of collagenous, elastic and recticular fibers; it holds organs in place

what does fibrous connective tissue do?

fibrous form parallel bundles that are nonelastic; it holds bones and joints together; found in ligaments and tendons

What does adipose connective tissue do?

it is a special loose connective tissue that stores fat; it serves as an insulator for the body

what does the bone serve as?

support

what does cartilage do?

it is chondrotin sulfate; is cushions the vertebrates and is found in between bones

What is the function of blood?

it is a connective tissue that transports things around the body

What is skeletal muscle?

it is bundles of long striated cells; it attaches bones by tendons. it is responsible for voluntary movement

what is cardiac muscle?

form contractile wall of the heart. it is striated responsible for involuntary actions

what is smooth muscle?

lacks striations; involuntary body activities it is found in the stomach and intestines

What are neurons?

long extensions that transport action potentials

What are glia cells?

the are the protective sheath around the neurons

regulators do what??

maintain constant internal temperature

conformers do what?

allow body temp to match the environment

whats the difference is homeotherms and poilkilotherms?

homeo - maintian constant temp p-have variable temps; can generate their own heat

What is radiation?

body absporbing heat through sunlight

What is conduction?

direct heat transfer from A surface

what is convection?

the transfer of heat through air movement

what is evaporation?

removal of heat from the surface of a liquid

How can you lower body temp?

sweating, painting and vasodialating

How can you raise body temp?

shivering and vasoconstriction

endotherms are ___

mammals and birds

What is the process by which food is moved along the digestion tract by smooth muscle contractions?

peristalsis

Parietal Cells function is what?

they secrete H⁺ and Cl⁻ ions separately in the stomach

What is the route of food digestion?

...

Pepsinogen is secreted by what?

chief cells

Which structure is not part of the alimentary canal? a)esophagus b)stomach c)salivary glands d)mouth

c

most of the digestion that occurs in the stomach is of what?

proteins not carbohydrates

One advantage of having a tube-like digestive tract is that digestive processes with different requirements can be separated within the tract.

...

Bile is produced by the _____ and stored by the _____ until it is secreted into the small intestine.

liver.... gallbladder
its release is triggered by CCK

When digested, proteins are broken down into _____.

amino acids

When digested fats are broken down into____

glycerol and fatty acids

What are sucrose, fructose, and starch?

sucrose- disaccharide
fructose- monosaccharides
starch- polysaccharides

Protein digestion begins in the ___

stomach

_____ is secreted by the _____ and acts to emulsify _____ in the _____

bile... liver.. fats... small intestine

Most carbon dioxide is carried from the body tissues to the lungs _____.

as carbonate ions

What is the function of a circulatory system?

It brings a transport liquid into close contact with all cells in the body.

Why do the circulatory systems of land vertebrates have separate circuits to the lungs and to the rest of the body?

The large decrease in blood pressure as blood moves through the lungs may prevent efficient circulation through the rest of the body.

The pulmonary circulation is the ____pressure circuit to the lung, whereas the systemic circulation is the ____pressure circuit to the rest of the body.

pulmonary is lower
systemic circulation is higher

What is the function of the left ventricle?

It pumps oxygenated blood around the body via the systemic circulation.

The systolic blood pressure is the peak blood pressure, resulting from contraction of the_____.

ventricles

Blood pressure is highest in the__

aorta

___ have the thinnest walls

capillaries

Carbon dioxide enters the blood at the _____.

head, forelimbs, abdominal organs, and hind limbs

What is the way blood pumps through the body?

rt. ventricle, pulmonary artery, capillaries of lungs, pulmonary vein, left atrium, left ventricle, aorta, head/feet, superior and inferior vena cava, and then to the right atrium into the right ventricle

the smaller an animal is the____ it's SA to volume ratio is and the ____ it looses heat

greater....faster

Vitamin B₁(thiamine) is a ___ soluble vitamin

found in pork,beans
coenzyme used to remove CO₂ from organic compounds
without it we would have nerve disorders (beriberi)

vitamin B₂ (riboflavin) is ____ soluble vitamin

dairy products
component of coenzymes FAD and FMN
skin lesions cracks around mouth

Niacin (B₃) is a ___soluble vitamin

nuts meats
in NAD⁺ and NADP⁺
skin and gi lesions nervous disorders (too much leads to liver damage)

Vitamin B₆ (pyridoxine) is a ___soluble vitamin

meats, veggies, whole grains
amino acid metabolism
irritability, convulsions, muscular twitching, anemia(too much numb feet poor coordination, unstable gait)

Pantothenic acid (B₅)___soluble vitamin

meats, dairy, whole grains
coenzyme A
fatigue, numbness, tingling of hands and feet

Folic Acid ___soluble vitamin (B₉)

green veggies, oranges, nuts, beans
coenzyme in nucelic acid and amino acid metabolism
anemia, birth defects (may mask deficiency of B₁₂)

O₂ is ____ in tissues so it flows from ____ to ____

lower.....blood to tissues

O₂ is transported attached to ____

hemoglobin

CO₂ is higher in the _____ so it travels from___ to _____

tissues....tissues to blood

CO₂+H₂O →

H⁺HCO₃⁻

erythrocytes essentially pulls___ out of the tissues

CO₂

Vitamin B₁₂ ____ soluble vitamin

found in meats, eggs, and dairy products

coenzyme in nucleic acid metabolism
anemia and nervous system disorders without it

Biotin _____soluble vitamin

found in beans, other vegetables, meat
coenzyme in synthesis of fat, glycogen, and amino acids
scaly skin inflammation, neuromuscular disorders`

vitamin C (ascorbic acid) _____soluble vitamin

fruits veggies, citrus fruits, Broccoli, cabbage, tomatoes, green peppers
used for collagen synthesis antioxidant
scurvy, weakness, delayed healing
gi upset with too much

Vitamin A (retinol) ___soluble vitamin

fat
dairy , deep green and orange vegetables and fruits

visual pigments maintenance of epithelial tissues
antioxidant
blindness and death
with too much headache, irritability, vomiting, hair loss, blurred Vision, liver and bone damage

vitamin D____soluble vitamin

fat
dairy, sunlight
aids in the absorption of calcium and phosphorus promotes bone growth
rickets( bone deformities)bone softening in adults
with too much brain, heart, and kidney damage

vitamin E (tocopherol)

fat
veggies, oils, nuts, seeds
prevents damage to cell membranes
degeneration of nervous system

vitamin K (phylloquinone)

fat
green veggies, tea, colon
important for blood clotting
without it no blood clotting
too much liver damage or anemia

Calcium is needed to prevent what? and what is it's main function?

retarded growth, loss of bone mass
bone and tooth formation, blood clotting , nerve and muscle function

Phosphorus is needed to prevent what? and what is it's main function?

Bone and tooth formation, acid-base balance, and nucleotide synthesis
weakness, loss of minerals from bone, calcium loss

Sulfur is needed to prevent what? and what is it's main function?

component of certain amino acids
protein deficiency

Potassium is needed to prevent what? and what is it's main function?

acid-base balance, water balance, nerve function
muscular weakness, nausea, paralysis, heart failure

chlorine is needed to prevent what? and what is it's main function?

acid-base balance formation of gastric juices, nerve function, and osmotic balance
muscle cramps, reduced appetite

Sodium is needed to prevent what? and what is it's main function?

acid-base balance, water balance, nerve function
muscle cramps reduced appetite.

Magnesium is needed to prevent what? and what is it's main function?

cofactor; ATP bio energetics
nervous system disturbances

Animals need two types of organic precursors from their food, _____, to serve as the raw materials for the synthesis of larger organic molecules.

organic carbon and nitrgen

In general, B vitamins function in your body as _____.

coenzymes

vitamin c is required to produce ___

connective tissue

Bile is ___ in the gallbladder it is actually made in the ___

stored... liver

Pepsin works best in __ environment

acidic

parenchyma cells are___

living, thin and flexible have chloroplasts

collenchyma cells are___

living support. they are flexible enough to allow growth

Sclerenchyma cells are ___

dead, rigid cells that are supported by lignin

trachieds and vessel elements are___

dead support systems for the xylem
vessels are generally shorted and wider
tracheids are long thin cells

sieve tubes and companion cells are____

living support systems of the phloem
companion cells have nuclei that function for both cells they are connected via plamodesmata to the sieve tube cells.

n what order would you pass through tissues when moving from the pith to the epidermis in a plant possessing secondary vascular tissue

primary xylem, secondary xylem, vascular cambium, secondary phloem, primary phloem

Lateral roots in seed plants are initiated by cell divisions in the ____

pericycle

A cross section of a plant part exposes epidermis, a thick cortex, and a central cylinder of xylem and phloem. This part is a ____

root central cylinder is found in roots
in the stems it is mostly found in bundles

proton pumps ____ ___of the cell

protons out

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