Which of the following statements about the effect of surface area and vol36b nxe:q l+/)ig/ wc rudrv(sume on the cell’s processesdr6w cu:)+xliqn/ge s/bv3(r is false?

  Which statement best des*q;nj9ha +-d wa3/1om gefyip +sl0d tcribes stem cells?

  Which is a correct description of tfc .9pcm9e*pe he cell type adapted for gas exchange in the lungs*p9epce cmf9. ?

  Which of the following explains the limitations on *ytsj8hy- q ql5w6zr 1cell size?

  What is this cell's most q bop /.)6daspk+jgc c)hnv-; likely primary function, and where could it be located in a macvjhs)+n) ;.pp o/kbg a-qc6dmmal?

  Which of the following characteristics of type I pneumocytes contribute t5isf,cyak) ct4hn 5)6tju.s/iy( x kio increasing the rate of gas ekusj yt, c.5ykn/65)ift) xhci4s( i axchange?
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 year old. One of the f5/ r 2v)wec9ld e4lhwdunctions of these cells is to produce/ dce2h5evwdllr4 9)w red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells and striatedjx* gtcs nl 5eoq9;9u5 muscle fibej u* gtsco9;5x5l9n qres?

Below is a diagram of a motor ne u ):ak/sr2cyldwpv* k-d wn45uron. Neurons are the longest cells in the human body.-rwcd4 vnl: s)wk/k52*aypud
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies somec2cvzudv n1 b0 pw;s--times suffer from infant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different alveo0;-2cpwndvb1s u z-cvli 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 rn+hr k(bnv4:v eason that embryonic stem cells are not used in the treatment ofvrvk +4n(:b nh leukaemia?

  The table shows the diameters of red blood cells from different organisms. Wh 3c2e zmcqfv*2- nrf-hich red blood cell will havr*q mnc h-32c2e-fzf ve the highest surface area to volume ratio?

1.Explain how the shape of e iji3d *enq74:eop7whrythrocytes and cells lining the proximal convoluted tubule make these cells more adapted toe:jw h4d iqe*3i77pn o 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 not t 3nq5,tl5x lls bm8i5prue? 5,ts inlx8l5q5pmlb 3

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 frzi1fif8 m+r *uom smallest to largest? 8fi*+zf uri1m

  Which row in the following tablafl:fcrndov2 q,;6xaa* : 3*lm w;yrye gives the correct disadvantages of the different stem cell sources for th 3;: da; oamw,an*2fyqfx6clr*yvr:l erapeutic uses?

1.Describe how the use of stem cells may be used to treat typedom :c90fwmjr c-p; -z I diabetes in the futureod rwj -;p-zmc:fc9 m0.

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 sph; us0p wva/6aecialised 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.