Which of the following statements about the effect of qt, n 5d9cbnqkx/h+) ysurface area and volume on the cell’s p+qyn,kb9hxcq d5n t/ )rocesses is false?

  Which statement best descri5ax*n:x yodgh mp)z). bes stem cells?

  Which is a correct description of the cell type adapted for gas exchange in t a:; m4g*mcstfhe luna gms; cm4t*:fgs?

  Which of the following explains the limitatiowitph1t1 ,4-3 dx *pq fyb9trons on cell size?

  What is this cell's most x49(fy;bn(qd+wr(d2 kmst1k6eml s xlikely primary function, and where could it be located in (x6(kt14 9 nk fmsq;dysblderm+xw2 (a mammal?

  Which of the following characteri0k 2ui* dims)nmnk xr *1hn9(xstics of type I pneumocytes contribute to increasing thn)01 ndmmrxh(sk*iu* 9k 2xine 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 transpla6 pqrxb s:4m0z8hla6xq(n c 6znt from a 36 year old. One of the functions of these cells is to produce red and white blood cells. What type of stem cells has the patient receivedqh60nrqp:zx8b a6slxmz6(c 4?

  Based on the Venn diagrax,q.a4 /fs5eraht x) jm, which identifies cardiac muscle cells and striated musclh,xrs)tq aj/x . 5e4fae fibres?

Below is a diagram of a motor neuron. Neurons are the lm4(6( gk c6 pdv)-e5xxwqgtpyongest cells in the human bodycxx6py mg-(4 vpe(t kd)gw6q5.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infa;:5l:ups z8xwo* zid vnt respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different xvszw ;8:5u:o ipl*d zalveoli 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 stec eb3uf3.2c 8b1 el.jauhb 8axm cells are not used in theuah3ba8e3 18fjb2be.ul.x cc treatment of leukaemia?

  The table shows the diameters of red blood cells from different orgahyh b))ylp9 d rfrq ) mvw25z-dgra8-)nisms. Which red blood cell will have the hig) g)d5vydyq)rh9-w-rlarb28mhfz p) hest surface area to volume ratio?

1.Explain how the shape of erythro(nxrq bk kx.91cytes and cells lining the proximal convoluted tubule make these cells more adapted to the f9q .bn k(xr1xkunctions 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)kf5exu . cve;/are not true? .;f) 5euve xck

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 smallest to l/ c 9himgjx i7fdh s,6fijg3 dq4z,-6sargest?jdg,zjh d/mcqx sf73fi6 ,i-g9i 6h s4

  Which row in the following table gives the lv;fl i r wphnpdmdx(dt *7s51a558t+correct disadvantages of the different tdhnp5p 5dxmr+l5( la1v8;t ws* 7dfistem cell sources for therapeutic uses?

1.Describe how the use of stem cet8 m+y v2im5c,c - xyyqciy:m1bwi7- zlls may be used to treat type I diabetes in the fu1 :q+yy m,wb ii-5cc8yxt-7mzcmv i2yture.

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 to scale0y 7/swoc61,nx4yy+cumtmmnhj3z f 3+ skjl2 ).

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.