Which of the following statem1fo-sa9c)v z yc; ix i;(gqpj/ents about the effect of surface area and volume on the cell’s processes is fgp-f oi;9zcjyc1 xa;)qvi /(s alse?

  Which statement best describesi3p7 8dauc*t 4)cggn s stem cells?

  Which is a correct description of the cell type adapted for,cr ncb+2 )0qvi3ym bw gas exchange in the lu b)nvy32bcm 0r+icq w,ngs?

  Which of the following explains the limli8urs65i ji ;itations on cell size?

  What is this cell's most likely primary function, and where could it be5v;j.u; sog2dfcvhtf.1i qs44v ,hmb located in a f;htqfji. bmg h,; vu s.vs1d 5c4v2o4mammal?

  Which of the following characteristics of type I pnes6d1 zr c;fk1aumocytes contribute to increasing dr1zfaks;c 61 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 bone marrow transplant from a 36 yeu) s ft0:n2;b7ilzmot ar old. One of the functions of these cells is to produce red and white blood cells. What type of stem cells has tu bml0s tfzno )7:;i2the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells and striggbhv2+3 ub1h ated musgh2bu3 +vbh g1cle fibres?

Below is a diagram of a motor neuron. Neurons are the9x2d /qd+p gsv longest cells in the human body. /9dv g+spdq x2
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infant respiratory distre)cq3 o5hlafa;: b:kukp86qgnz9qd* mss syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The lo96aukg m;bq q8z:n)k:5 a3 fqh*dpcdiagram 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 da ygl*r*rgp8 9n7 tz(.s.+ju1kvtiwthat embryonic stem cells are not used in the treatment ofns. g g (*p71aut9tj*v+ rklwzd.8yir leukaemia?

  The table shows the diameters of red blood cells from differenfbyz;; v -h*rbt organisms. Which red bloo*z ;hb- vfryb;d cell will have the highest surface area to volume ratio?

1.Explain how the shape of yq1f g:(. wyhverythrocytes and cells lining the proximal convoluted tubu(yvghy1.:f qwle make these cells more 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 embryonr u*3y 7vsdl70pdm fr(ic stem cells and specialised cells is/are not true? l d0f77sd*3rrpyum(v

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 orw )s9d)f6qpg uj1 t03av1xsse der from smallest to largest?j 6tv113))s wd fx0pg9 sqaseu

  Which row in the following table gives the correct disadvantages of the dif/+z: mtm ljf-zferent stem cell sources for thlzmmft: z/+-jerapeutic uses?

1.Describe how the use of stem cliv99 j+ nk u)spkqk.q)7cl2b2+bhtel1zmf5 ells may be used to treat type I diabetes in the future.p1e+ctn9sj225z.huq l) qliklm +k9) b7 fkvb

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 specialis5nw*sywp)c 0x (gipo6t )9rwwed 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.