Which of the following swb*u6nsg 6t0 atatements about the effect of surface area and volume on the cell’s processes is ft66u* 0wgsanbalse?

  Which statement best describes sup,1se h0xuyo2r b; .gtem cells?

  Which is a correct descriptioni /xmdc9/kh+ u of the cell type adapted for gas exchange in the luuh/x9+d/k ic mngs?

  Which of the following explains the limitations on cell si-s;mc3jq x, fx6+bzl( o3 vwgqze?

  What is this cell's most likely primary function, and whh/xi(5sib op2d bl 2d7ere could it be located in a mammal?5s/xpbdb2(d io hl2 i7

  Which of the following characteristics of type I pneumocytes contribute to inchh x3zh*ix: q;reasing the rate of gas exch:qx;*z ixh 3hhange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone ma/iz2:p u+wi8/5vu-xe w4znpmif +dem rrow transplant from a 36 year old. One of the functions of these cells is to produce red and white blood cells. What type of stem cells ha d8f:u +zvi2 m5 ep+ wn/xwmezuip/-4is the patient received?

  Based on the Venn diagram, which identifies cardia1l caim)z+7qrc muscle cells and striated muscl+c7 iaml)q1r ze fibres?

Below is a diagram of a motor neuron. Neurons are the longeae j:*ntktk4c n76( zost cells in the human body. (:4z*a kcn6to7kte nj
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer frog /m*n-6 usb;ptld4yt m infant respiratory distress syndrome, whibst - /ytnul* pd6;4mgch could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different alveoli structures.


1.Describe one feature of the surfactant.

2.Suggest a treatment for infant respiratory distress syndrome.

3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.

  Which of the following is a reason that embryonic stem cells are not used in theakjn68:1e su 1zoy1aj4dsa 3n treatmas:jn4aa nju83s1 o dezy1k61ent of leukaemia?

  The table shows the diameters of red blood cells fro f 9kop9wkln*p2j6z0v)l).wl0n*nr 3z fcvggm different organisms. Which red blood cell willl lvp0gnnvrwp2gkz)l3 o.)j * 0zc99k f*6wfn have the highest surface area to volume ratio?

1.Explain how the shapc. zovd8*sgj2u a(+cgou1m pdmx5n5+mp v.c2e of erythrocytes and cells lining the proximal convoluted tubule make these cells more adapted to tduc1.* .onggo(z cx j855sm+m vv2pm 2dp+uache functions they perform.

2.Compare and contrast the structure of striated muscle cells and cardiac muscle fibres.

3.Explain how the structure of egg and sperm cells are adapted to their functions.

  Which statements about embryolujec8.o8q 5 .pij/tcnic stem cells and specialised cells is/are not true?85. e oculptjqj/ i.c8

I. Embryonic stem cells have higher levels of DNA methylation than differentiated cells
II. Specialised cells are more differentiated than embryonic stem cells
III. Most specialised cells and embryonic stem cells both contain the entire genome of an organism

  In humans, which of the following is the correct ordey73necsl w 8k k,u+qhq7v/7tkr from smallest to largest?q7/ cvheyuqnk7k8 s+ 7k,w3tl

  Which row in the following table gives the correct disadvantages h)wm h (fmpnt(;x:vj;of the different stem cell sources for p : hv(wh;t)jx mm;f(ntherapeutic uses?

1.Describe how the use of stem cells ma2yz v: 3k(7jgk6kv+mjw1uar( bo) ryay be used to treat type I diabetes in the futz1a23k :r ag o67b(ywjukm) jy(kv+vrure.

2.Explain the factors that limit cell size in humans.

3.Explain how red blood cells and striated muscle fibres are adapted to their function.

Below are diagrams of57be 2 na;n;jkity :pl specialised cells (not to scale).

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.