Which of the following statements about the effect of surface area and m y*n(4 jv)xdf7kb iug0+z+hbvolume on the cbujinhxky f+)+0 d4mz7*gbv(ell’s processes is false?

  Which statement best describe:pe ,umric-:ywkm9 b x0ojt+ :s stem cells?

  Which is a correct description of the cell type adapted for gas exchange in th qf+ jlzq4 n8xg(z8h:pe l q8lng(8qzp+fxj4 zh: ungs?

  Which of the followin+ ;pbdn wisxi;raw;*4 g explains the limitations on cell size?

  What is this cell's most likely primary function, an):-fxvm t+v bzc2o8z nd where could it be located in a mammal?t8x+)z- n fvvbmz2co:

  Which of the following characteristics of type I pneumocytes con1 rndx, z5mtu5tribute to increas1mux55dn,t zring the 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 36 ygyuhe,5idb / wt3 50xyear old. One of the functions of these cells is to prodh ,5xd/u3 yy0 iewt5bguce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, wh4hilam7/ch,nm q w0: 0 r mo3vtzv4(nbich identifies cardiac muscle cells and striated mu 7hq34m0, nnv(comit b0:zmvwa 4hlr/ scle fibres?

Below is a diagram of a motor neuron. Neurons aet;ya pvdz +tl1k6/g9 re the longest cells in the human bo;9p+kz g/tvld6tya 1 edy.
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 syndrome, w9hiopr.5bvwg 25boar :wr(-n hich could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different alveoli str vp rb-g:( a5ihr b9.nw2o5rowuctures.


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 not used in c0q7)j,q ym/8axizd u)akuw. the treatment of leukaex/ua7m8 0.jc,uqizky )w d q)amia?

  The table shows the diameters of red blood cells from different organisms. Which*vqe(bj9n -s i red blosb vein -9(*jqod cell will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocyteszt4 9 ry:x vaz3gi0m9ac61 xxa and cells lining the proximal convoluted tubule make these cells more adapted to thg 9a149a0vyazc t:3x6 imxxzre 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 abo6xxuqf6emx 9yfr+ 8f5d si2x* ut embryonic stem cells and specialised cells is/are not true2exqmxd 6sf+ri5fx 9u*6f8yx ?

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 f6x yyx8l t7k :8ai9 -ke,dewvgollowing is the correct order from smallest to largest?v 9ti:x yaxgdl88e-ky67ke w,

  Which row in the follwt5rx kkf6y-5z- p, egowing table gives the correct disadvantages of the different stem cell sources for therapeuez p-w-ftx yr,k 5gk65tic uses?

1.Describe how the use of stem cells may be used to treat type I diabecy4pk w*tf7dab)n-8 q tes in the fut* q-a)n4b7dcpw8fk yture.

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 (nr;w t b7em-h+ 3.i mcm.hdp:bdot 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.