Which of the following statements about the effect hs:s4 oqs/hyn cafn/9 *4k 2neu hv,1b-op1kxof surface area and volume on the cell’s processesecyhnh-pu/2/k1vxf, ks s*hnb 4 4n: qa1o9os is false?

  Which statement best delt b(-w +oi(ytj)j2 uhscribes stem cells?

  Which is a correct description of the cell gm*-wv1mxsjwam 2-uxsqh,y4f81d .q type adapted for gas exchange in the jx4w q21-asd xhvq. ,8u mwg* mmyf-1slungs?

  Which of the following explains the limitations on cell siziboad ;;og7u55 vs ur)e?

  What is this cell's most likfo1ohk j :wd2aw/f,6hra.j x 8ely primary function, and where could it be located in a mamwkorw j d.j xf8f26:ah,1aho/mal?

  Which of the following characteristics of type I pneumocytes contribuuvkzjy20q dmq;3 )hz1te to increasing the 3 qz0hjqu)kzmy2 vd1;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 transplh mv)vp(:xs9i5e :hc oant from a 36 year old. One of the functions of these e:vhv()oc5x 9 hmi:sp 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 muti.b2 nf 3(e(k2zm lrm(trug 0scle cells and striated musclenlzg mfbti2 k(r 3er0m(ut. (2 fibres?

Below is a diagram of a motor neuron. Neurons are hy)r*dg. 9yn ythe longest cells in the humanr.hyyd*9 )g ny body.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimecnl,8; *q cclg8xw*u ts suffer from infant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. Thelg,nw ;u ccct8 *lq*8x 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 not utce,f rg3;o2b2n *hk 2on5yn*lvz wj1sed in the treatmentyng **w,hetl51nrf2oc v2no3;z2bj k of leukaemia?

  The table shows the diameters oqb/u dn neykt 3v5)(c:f red blood cells from different organisms. Which red)tuqn/ nyvk3:ec (b5d blood cell will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cell tkv)wi)q4ww t1bg l19bea9p:s lining the proximal convoluted tubule make these cells more 4p)bv e1 g ):wt1qkilat9 9wwbadapted 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 specialisekou+x7cd y)7h d cells is/are not truexcu)yd 7o7+kh?

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 /+cfzf:b:5dov fxe 1e correct order from smallest to largest? z1dec: ebvxo:/fff5+

  Which row in the following table gives the cordt nixxf(k*/iq 2zn-: rect disadvantages of the different stem c-qx*:t knn iz(i/2dx fell sources for therapeutic uses?

1.Describe how the use of stem cel kp2kv3dtvhn37 dot- jni w,86ls may be used to treat type I diabetes in the futurkv 237iokwv tjddth,3n6-np 8 e.

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 l oo;1uxihajr6;(.v eto 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.