Which of the following statemen9ol1rn3z g; njy nsv9;dbx /kf-hh0f1ts about the effect of surface area and volume on thv-xkld/;1 f ozb gnynh1;fnj3r9 90she cell’s processes is false?

  Which statement best descri/3c)eq de.- iw)eytzhr+hgw3bes stem cells?

  Which is a correct description of the cell type adapted for gas exchaes24zd;9 q lqdnge in the lun; 2qdql 4zde9sgs?

  Which of the following expllv vvw0fwx1kv3fjl+/ etqfhg3l,0).ains the limitations on cell size?

  What is this cell's most likely primary fwbp.l 0;5z;n )fj,o:tqoj59qcqkme yunction, and where could it be located in a mammalwljobq59z. ,fqejyk 50m );o np:;qct ?

  Which of the following characteristics of type I pneumotmh 5rmx-y,0ambvuz h:sz( 89cytes contribute to increasing th-ay t(rumv8:,h mbmz zx095hse 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 year old. One of th* hwy0e9cdllabei* 7mj97 5ul .zhwn2e functions of these c*9ylali*hjh c d0 5unme9bwz7ew. 27lells is to produce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifiesi-xm+9ozsu pu aps+zig3y r (g+ ij19+ cardiac muscle cells and striated mus 9m+j+gas3u+ryso(gxzi ip+ u1i-pz 9cle fibres?

Below is a diagram of a motor neuron. Neurons are the h.e3 m;0wzpg vlongest cells in the human body. e;v3g.ph0 wmz
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from xl8 xmk)xb euk6 3wt0b++ghx8 infant respiratory distress syndrome, which could be cau)x6 xhbetu+3bgk x +k0lm88 wxsed by 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 cells are notds9, c r1z5; dyydi0*(us suudpuz,, x:;vwob used in the treatmensd y 1p ( yd;;,zudd*v:i9,rsu,zocw u5 u0sxbt of leukaemia?

  The table shows the diametvphrk )w ndgfbb(-zr5.4r42/cn 8iukers of red blood cells from different organisms. Which red blood cell will have the highest surface area to volume rati( n4dzcv8 u g-i.5bk4/r2fr p)hrk wnbo?

1.Explain how the shape of erythrocytes and cells lining the proximal convr- 8 wm nf*u/ty4p86kcag 5qz)rrmfb0oluted tur*w t 5r0m6cf4 gmuq kr-y znbpaf/)88bule 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 cellszw hsozz**syq n1 h0ct; v/4)c is/are not truec *wzh/nc zh0yq ;4so*s zt)1v?

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 corr.,d31jlf i2h0 vwyx;n p2p9 bm3cpisnect order from smallest to largest?9yxjmc;n.20i f3vw hsb nipdlp p2,31

  Which row in the foll zki5l b7d5cgv5 ac7jz +))xxlowing table gives the correct disadvantages of the different stem cell sources 75lb 5da)7+j5c)gczil xk vzxfor therapeutic uses?

1.Describe how the use ofe tjwms):+ yty cd2xax, a-3k+07bmst stem cells may be used to treat type I diabetes in the fuym d :kxays +73tjast)be- 2tw,xm+0cture.

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 (nomx36 vlxzog4am0v t -r:4.f .a ,nylwet 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.