ehd123

Beginning with all chambers of the heart in the "relaxed" phase, describe the ca

Beginning with all chambers of the heart in the "relaxed" phase, describe the ca

Beginning with all chambers of the heart in the "relaxed" phase, describe the cardiac cycle in mammals, with systole and diastole of the atria and ventricles. For each time point in the cycle you select, state the following:
 
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colleen   1476   1 Reply

lewis

Poiseuille's equation makes a variety of assumptions regarding the physics of bl

Poiseuille's equation makes a variety of assumptions regarding the physics of bl

Poiseuille's equation makes a variety of assumptions regarding the physics of blood flow through the circulatory system. Give Poiseuille's equation, and list the violations for each of its four variable parameters. 

colleen   1580   1 Reply

lewis

In birds and mammals, blood pressures are different between the pulmonary and sy

In birds and mammals, blood pressures are different between the pulmonary and sy

In birds and mammals, blood pressures are different between the pulmonary and systemic circuits. Which one is greater? Why is the difference advantageous? 

colleen   4321   1 Reply

lewis

What are angiogenic inhibitors and why are they being studied as possible treatm

What are angiogenic inhibitors and why are they being studied as possible treatm

What are angiogenic inhibitors and why are they being studied as possible treatments for cancer? 

colleen   842   1 Reply

lewis

There are different types of pumping structures in animal circulatory systems. D

There are different types of pumping structures in animal circulatory systems. D

There are different types of pumping structures in animal circulatory systems. Describe the three different types. How is one-way flow ensured? 

colleen   1246   1 Reply

lewis

In its protective role, the blood-brain barrier becomes an obstacle in deliverin

In its protective role, the blood-brain barrier becomes an obstacle in deliverin

In its protective role, the blood-brain barrier becomes an obstacle in delivering therapeutic drugs to specific regions of the brain in the treatment of a variety of brain disorders. Describe what the blood-brain barrier is made of, and how different

colleen   906   1 Reply

bio_man

Why is it so difficult to localize sound with only one ear? How does having two

Why is it so difficult to localize sound with only one ear? How does having two

Why is it so difficult to localize sound with only one ear? How does having two ears help to localize sound?   

colleen   966   1 Reply

bio_man

How does the mammalian eye focus an image? In your description, name the importa

How does the mammalian eye focus an image? In your description, name the importa

How does the mammalian eye focus an image? In your description, name the important physical structures in image formation, define the focal point, and explain what accommodation is and why it is important.   

colleen   1375   1 Reply

bio_man

Explain the role of the Ti plasmid in causing crown gall disease in plants.

Explain the role of the Ti plasmid in causing crown gall disease in plants.

Explain the role of the Ti plasmid in causing crown gall disease in plants.

colleen   854   1 Reply

sci_expert

Particular type of cell of the epidermis

Particular type of cell of the epidermis

Can someone describe this particular feature "plastids within epidermis cells"

emily   7446   1 Reply

johngalt789

help

help

In the early plant embryo, cells divide asymmetrically. Which structures result from divisions of the apical cell?

qnitram   4130   1 Reply

asanders

Why do plants produce seeds and not stay as spores?

Why do plants produce seeds and not stay as spores?

Why do plants produce seeds?  Yes, it is for reproduction, by why go to all that trouble?  Lots of plants do just fine by producing spores, which are much less complex.  What are the reasons for producing a complex structure like a see

dreamingtruth   5018   1 Reply

bio_man

How has the Bt protein been used to increase insect-resistance in plants?

How has the Bt protein been used to increase insect-resistance in plants?

How has the Bt protein been used to increase insect-resistance in plants?

barry   591   1 Reply

duddy

What characteristics of plants allow them to be cloned relatively easily, wherea

What characteristics of plants allow them to be cloned relatively easily, wherea

What characteristics of plants allow them to be cloned relatively easily, whereas cloning in animals is rare and difficult to achieve?

barry   666   1 Reply

duddy

What is the defination of die between zoological and plant biological lifes?

What is the defination of die between zoological and plant biological lifes?

Hello everybody,
There are mainly  two part of biology :
1.Zoology
2.Plant biology
In Zoology have discuss about bio of animals and plant biology have discuss about life of plants.We know that every kinds of life's may d

greatmona1   2291   1 Reply

how_mendel

What is the main difference between Parenchma, Collenchyma and Sclerenchyma?

What is the main difference between Parenchma, Collenchyma and Sclerenchyma?

I no there are three different types of ground tissue, Parenchyma, Collenchyma, and Sclerenchyma.... but i dont the major differences between them...

riyaz   1134   1 Reply

11askaggs

What type of cells are most prevalent when looking at papyrus under a microscope?

What type of cells are most prevalent when looking at papyrus under a microscope?

Options: sieve elements, tracheids, parenchyma, or periderm?

02bchallenged   325   1 Reply

lhendrix

What causes grass to be thick and lush?

What causes grass to be thick and lush?

I'm doing a piece of biology coursework based around grass thickness and how it increases as distance from the shade increases. Can anyone give me the science behind it and bring in like the cuticle of the grass and the palisade parenchyma?

oanh.nguyenh   396   1 Reply

oangi

Which of the following is not an important component of the long-distance transport process in plants?

Which of the following is not an important component of the long-distance transport process in plants?

1. A negative water potential.  
 2. The active transport of solutes.  
 3. The root parenchyma.  
 4. Bulk flow from source to sink.  
 5. The cohesion of water molecules.

zzz   578   1 Reply

juliem

What are the general physical characteristics, location in a plant and the special functions of these cells?

What are the general physical characteristics, location in a plant and the special functions of these cells?

What are the general physical characteristics, location in a plant and the special functions of these cells?

parenchyma cells
collenchyma cells
sclerenchyma cells
guard cells

Best answer goes to the most detailed answer, that describes each cell

oangi   607   1 Reply

06Ralph

What kind of cells is the outermost layer of an onion made of?

What kind of cells is the outermost layer of an onion made of?

What kind of cells make up the outermost (paper like ) layer of onion bulbs? Parenchyma, collenchyma, etc...

toesha   439   1 Reply

zzwChris

Growing young plants are supported structurally but are also flexible. Which of the three types

Growing young plants are supported structurally but are also flexible. Which of the three types

11.Growing young plants are supported structurally but are also flexible.  Which of the three types of ground tissue cells ? parenchyma, collenchymas, or sclerenchyma ? could best provide support without making the plant rigid?

ikk260   471   1 Reply

zzwChris

Question on Parenchyma tissue .?

Question on Parenchyma tissue .?

Where in a flowering plant can you find parenchyma tissue that retain its ability to divide and for what purpose?

zanyu   277   1 Reply

DAV620

Are parenchyma cells specialized plant cells?

Are parenchyma cells specialized plant cells?

Is parenchyma cell a Specialized Plant Cell?

toddandrus1   413   1 Reply

oanh.nguyenh

what is the function of parenchyma?

what is the function of parenchyma?

what is the function of parenchyma?

lhianeo8   371   1 Reply

zzz

Conducting elements, Sclerenchyma, and Parenchyma?

Conducting elements, Sclerenchyma, and Parenchyma?

What common concept do all of these words have? Defend your answer.

dataplease   594   1 Reply

ToddTek

what is the difference between cellulose and fiber?

what is the difference between cellulose and fiber?

I'm trying to figure out what type of xylem cell would be stained by Congo red (either fiber, tracheids, vessel elements or parenchyma cells). congo red stains cellulose.

_biology   518   1 Reply

datasian

Any useful sites with pictures of plant anatomy (e.g., parenchyma cells, phloem, xylem, etc...).?

Any useful sites with pictures of plant anatomy (e.g., parenchyma cells, phloem, xylem, etc...).?

Any useful sites with pictures of plant anatomy (e.g., parenchyma cells, phloem, xylem, etc...).?

ikk260   594   1 Reply

FISH0818

is cortical parenchyma monocot or dicot?

is cortical parenchyma monocot or dicot?

is cortical parenchyma monocot or dicot?

iknowdoyou3   505   1 Reply

riyaz

why is it important to know the 3 simple ground tissues in plant cells:?

why is it important to know the 3 simple ground tissues in plant cells:?

parenchyma, collenchyma, and sclerenchyma?
but overall why is it important to know? what goodness do they do?

zaq zaq   523   1 Reply

FISH0818

The ground meristem gives rise to which of the following?

The ground meristem gives rise to which of the following?

The ground meristem gives rise to which of the following?

A. ground tissue

B. tissue found between the dermal and conducting tissues

C. a pith in the center of a plant stem

D. parenchyma cells

E. All of the choices are correct.

juliem   490   1 Reply

dave

about cortical parenchyma

about cortical parenchyma

the function? i only know they got large central vacuoles...
is it belong to chlorenchyma? do they got chrolopast?

toddandrus1   605   1 Reply

smile

give me the differences of the 5 simple permanent tissues? Epidermis,Parenchyma, Collenchyma, Cork?

give me the differences of the 5 simple permanent tissues? Epidermis,Parenchyma, Collenchyma, Cork?

at least 5

11askaggs   849   1 Reply

firework6

What's the most structurally significant plant cell?

What's the most structurally significant plant cell?

I'm doing homework for my HS biology class, and I'm stuck on this first question!!! Here are the choices and thank you for your help in advanced!!

collenchyma
sclerenchyma
parenchyma

fire_crystal   422   1 Reply

toernqvist

which does NOT occur in a typical angiosperm leaf?

which does NOT occur in a typical angiosperm leaf?

a. spongy mesophyll cells
b. phelloderm
c. xylem
d. epidermis
i think its B ... ? true?

julietalbot6   398   1 Reply

firework6

describe how an angiosperm is pollinated and fertilized?

describe how an angiosperm is pollinated and fertilized?

include where pollen comes from and where it must be deposited. where are the ovules and how does the sperm get to them?

please help me with this question for biology, my worksheet is due tomorrow

oark   542   1 Reply

lhan83

Which group of Mesozoic-aged gymnosperm seed plant is the angiosperm descended from?

Which group of Mesozoic-aged gymnosperm seed plant is the angiosperm descended from?

Please Please Please Please and Thank You! I can't find anything!!

smhry   659   1 Reply

iksun1002

Does anyone know a site that lists a list of all gymnosperm and angiosperm leaves?

Does anyone know a site that lists a list of all gymnosperm and angiosperm leaves?

its for a project

smidwids   391   1 Reply

11askaggs

Is the Brittle Bush an angiosperm, a gymnosperm, or a non-vascular plant?

Is the Brittle Bush an angiosperm, a gymnosperm, or a non-vascular plant?

Is the Brittle Bush an angiosperm, a gymnosperm, or a non-vascular plant?

firetruckboom   903   1 Reply

oaqadir

Is the Gametophyte generation of angiosperm dependent or independent of the sporophyte generation?

Is the Gametophyte generation of angiosperm dependent or independent of the sporophyte generation?

Is the Gametophyte generation of angiosperm dependent or independent of the sporophyte generation?

toesha   891   1 Reply

iknowdoyou3