Which of the following statements about the effect hz 1z;wqf -onn/vr/ tvk +5sty 6o)dv)of surface area and volume on the cell’s pt y6+/ /q -;vkonf1snvod )zwt z)h5rvrocesses is false?

  Which statement best describes stp1o05w eqolhp (ql sa842yi2wem cells?

  Which is a correct descriptig ( 0xgvy-.wvmon of the cell type adapted for gas exchange in the lungs0gy v-v(.wmg x?

  Which of the following explains the limijq;-6lh79klyl/uxwbm k wd : )tations on cell size?

  What is this cell's most likely primary function, and where could it be locatdzlw 790zl9ibed in a mammal?0bzi7l 9d z9lw

  Which of the following characteris1i a1-mgw7 fhstics of type I pneumocytes contribute to increasing the rate of g w hs1a-m7igf1as 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 year1rc k;gx68u vdhb-t/f*cgc 1p old. One of the functions of t8gcg1k tp/1rc* dfu v c;-b6xhhese cells is to produce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac mus uf ofw:36-kp6; 0svto ox 9o-f-lmdgvcle cells and striated muscle fibre:k s6;vf9v gdx0u -6oof-fopmtlw 3- os?

Below is a diagram of a motor neuron. Neurong mx1t)34kgq iyzrbwocdvw5fa9xq,7)t2 q;6 s are the longest cells in the human body.gx f7tbvqk g,r5y9waxoq 3 ;zq))i46mt 1c2w d
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from ind /mjh)yrrq vq1-6ys: 7tzgd9 fant respiratory distress syndrome, which could be caused qt -9/6vdrz7dq smy:g jh1 r)yby 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 cell/mg9 v8mmxwcss;1 ,zrj*7js es are not used in the treatme 1s,8 z/cxv*s7 jsmwmm;j9gr ent of leukaemia?

  The table shows the diameters of red blood cells fromzm5cp)fm; d +9:aws ju different organisms. Which red blood cell will have th;us+:p5 a)z9mfcj mwde highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximaw4y2xps q- zm6xz;c,j z10oyql convoluted tubule make these cells more adapted to the functions th 2y1 y;cz-zsp4,x06jwzmxq qoey 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 notzw4cd vk hjj),/k++ iix.aq2p truehpajc4qkji.w /zd2i)+ xv ,k+?

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 thtoat4fpyqz9hl261/b. nyv ueqb 5 5m1 e following is the correct order from smallest to largest?of t4v2u ne 6/zy91mqtb5 yl1a.b5pqh

  Which row in the following table gives the correct disadvantages of the differ-lx cd44ai br;ent stem cel;i4rxl da bc4-l sources for therapeutic uses?

1.Describe how the use od1 m1c5wy yy ek *q) hi0*27myah3grvtf stem cells may be used to treat type I diabetes in the future.h01)w*ei3m1 t *r kv7gy5 cd2amy hyqy

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 specialiseds2a rx2zm z76d 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.