Which of the following statements about the eq7q6*cpkk h+z m/6rx)gay3 zoffect of surface area and volume on the cell’s processes is fa3ka+ qq7pxm *gkh6o6 )z /yrczlse?

  Which statement best do), pqbs6l+4;owqf wozpzt9i,5y x6m escribes stem cells?

  Which is a correct description of the cell type adapted for gas exchange in t90c3uuhd -qa3e qnjm7he lungs?u-d0jua93eqmqn3 h c7

  Which of the following e wiq)aatqu7/agj- 1 hb.vck6(zyv/ v )xplains the limitations on cell size?

  What is this cell's most likely primary function, and where co-kp2rkpcc qiny;p .)oav31 wf72er8auld it be located in a mammaprkf -p owy eqp c7;2v13rni.)a8 2kcal?

  Which of the following characteristics of type I pneumocytesaei ;)-oe uzs3 contribute to increasing the rate-u s;zeoi)a3e 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 /z,a 7+obi) -q,qk6upqoam gcfrom a 36 year old. One of the functionszac/7ob-,,+ u6ko)q i aqmg pq of these cells is to produce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identi 5- u:c+ dsx5 xrpskxh;ukl,s9fies cardiac muscle cells and striated muscle fibres?5sdshp+ru xs;k,-uk9cx:l x5

Below is a diagram of a motor neuron. Neurons are 6mgnd t: 92ofjfqpc,.f*,f mgthe longest cells in the human body. 2f,mo 9:gg pm.jfcfnt* d,q6 f
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 distress syndromi0p 2cyl5x l9.pkxo5qe, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different aly p5oi9clkx2xqpl05 .veoli 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+zt/eui90rcqc;mg, *owm 3 0r1bxrrx not used in the trea3*i9b toqxrgmc,; x1m0+uw 0ec/rrr ztment of leukaemia?

  The table shows the diameters of red blk he,0m2qmj; mood cells from different organisms. Which red blood cell will have the highest surface are k; mhqm2,j0ema to volume ratio?

1.Explain how the shape of erythrocyte/pu*ik8( tv4yg10a d zq0e hrvs and cells lining the proximal convoluted tubule make these cells more adapted to the functions they perform. gtp*0 (qr 4vzyvieu81ah/k0d

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 cehq:aheued 0/ *re;0cc9 m)9j9ox nj:4jvxnd h lls is/are not trueanqv x; cj)h jer9/on:0*9xc9h04u : ejhdmed ?

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 small4rv qa9y2mlap8kd :3lest to largest?4yq 29ram 3pkal8dl:v

  Which row in the following table gives the correct disadvs/ ;y6*zcoc8 wdx2pj; fohj /oantages of the different stem cell sources for therapeutic/2df8zjo sohpx6jy;/;oc*w c uses?

1.Describe how the use of stem cev;k6/.1* fipz2kqtpvd ct .pylls may be used to treat type I diabetes in the future q1vi ;zkt./fvp6cp2 dy.tp*k.

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 celasv:2 ,-xw0*c .gjcns6t dyp vls (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.