Which of the following statements about the ef gevvb/7 0kub0 qan8yxp//;sefect of surface area and volume on the cell’s prb7v v gb0se8ayen///x;k p0quocesses is false?

  Which statement best descri:a mn tsuvh*n,/-g8vq3gzj 3vbes stem cells?

  Which is a correct description of the cell t;zgs;j4e a 9dyo5ft5 w5himj2ype adapted for gas exchange in the lun5 f;5 a92je mg4dhiyj;wso5tzgs?

  Which of the following explains the limx)bj3e qntq/tt--4f9d x db6u24sorg z 1xt. jitations on cell size?

  What is this cell's most likely primary function,6e 7h7bomcrpl24z74 gnrq p19yap)nz and where could it be located in a mammal?4 cp196gry2lq74zop7ah en7z)r nbmp

  Which of the following charahm a /+hz s;ij e8razqaq75n78cteristics of type I pneumocytes contribute to increase/8;z ir87 zq+ 7maqahn5j shaing the rate of gas exchange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bob+ng0od ,kv1 bne marrow 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 has the patient n,odkg0b+v 1breceived?

  Based on the Venn diagram, which identifio+qs4jlf5c5n 37;3gg ety urtxxx*y1 es cardiac muscle cells and striated muscle fibrexg 5o3yl7x514+y;gtq3 cut fe* snrxjs?

Below is a diagram of a motor neuron. Neurons are the lnknt* )ogup.4ongest cells in the human bodyup4 *) o.tknng.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from ikl9(ng )d c 1yhcy(o7hnfant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The dia79cg h1d(ykyh )lc(ongram 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 usedk 95pk.3d3 c,rhhhz r(m ol6vo in the treatmenth(6m.rrd53k h9hc3 ,zpvkool of leukaemia?

  The table shows the diameters of red icgu8h a+l5(zblood cells from different organisms. Which red blood cell will have the highest surface area to vg(l8zcu 5+hi aolume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximal convon p;.l*gx h+o(b h/ebewo*)tf luted tubule make these cells m*)f o+b/hnh.bxew( ;*elgtop ore adapted to the 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 embryonic stem cells and specialised cells is/are no( -8lo/:l0wpyk br2.i2csuk6 sk bt;r bcql9ct true? 0k: i;8l6utpkrlq 2b( sbcc 9 . cbwly-ors/2k

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 order from smalrv*3uaar78fx+j ab w 9lest to largest? r 87rx9bv3aj *awafu+

  Which row in the following table gives the corre ee5,ajk6 efo2u* (hk 1p;gdve* mdmn)ct disadvantages of the different stem cell soufepd*6 u1hk;ga(n) m, j5ev*o 2keem drces for therapeutic uses?

1.Describe how the use of stem cells may be used tomag.j4b 6t3y z enzyf 0e/y10i treat type I diabetes in the 3 t/je bn0yyme1 z.04 6gfzyiafuture.

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 of specialised cells (not tq 9leaz(gy go.8;8sqyo 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.