Which of the following statements about the eff jgr4sr:s mw:x8xd))u,4 oia yx z8z-dect of surface area and volume on the cell’4 oz m8ds)wg 8jxzir:4xyxr,)ua s :-ds processes is false?

  Which statement best describes stem celmos;jnsa7 * t4ls?

  Which is a correct description of the cell type adapted for gas exchange / kw zrm4e7:egtbl lz7q + le;+c1mos+in the s qbmrm/; +e e774olz+ wglel1k: t+zclungs?

  Which of the following explai f dyby d6w(o);asz).(sgq /xwns the limitations on cell size?

  What is this cell's most likely primary function, and where could it be locat(cenl*25 f9/j xzmwd*sw-tgued in a m(f *sug9w cxmjne2/ zdl -t5w*ammal?

  Which of the following3a9 .xluw 4 zxr,a1vub characteristics of type I pneumocytes contribute to increasing .rux34u,l 9v azw bax1the 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 3fgov6,:9 o 3h c6hwtzi6 year old. One of the functions of these cells is to produce red and white blood ce3gt whfci96vo ho6z: ,lls. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac musco styc r3bs1+j(9 w +taxijk+0le cells and striated muscle fibres? 1 acy i +j 3b+or9w0(xs+tkjts

Below is a diagram of a motor neuron. Neurons are the ldngr0 yyf5 k9n co9s8nj):) rgongest cells in the humanj:gdr8ck50 frn)n) yn99 g oys body.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infantz d6byxa+0q )b i0mxn9 respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two d b +6y0qnxzx0iamb)9different 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.q * wxoj(,auj stem cells are not used in thejx,.(u j *qaow treatment of leukaemia?

  The table shows the diameters of red blood celrhh 0ntf*o rqc5p42) ,apngn;h( (n ukls from different organisms. Which red blood cell will have the u (hnk 45 nq0f(2r)ga t*r;o hphncpn,highest surface area to volume ratio?

1.Explain how the shap8* dhroe;pr3hiej8 2ce of erythrocytes and cells lining the proximal convoluted tie pej8dr8; ho ch*3r2ubule 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 embryonic stem cells and specialised cells is/are noe i j3fuh2(um 5a7r1gpt true?uj a7e 2 f(3urh5pmg1i

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 fr h9 wc)a :licqeon3;e)obz )vkg -y29nom smallest to largest?9e cl av ey;k)-nig92wob3qhnoz)) c:

  Which row in the following table gives the correct disad tnk*h-s0)w)ngc.qfg vantages of the different stem cell sources for tw*q ft0n h)gckg).sn-herapeutic uses?

1.Describe how the use of;;kks xu7.k vx stem cells may be used to treat type I diabetes in the future. 7skx;vx uk;. 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 cells (not tdjc n gws2vq6*n2v(5 eo 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.