Which of the following statements about the e*c 6s qoex18mq/ (d0; mammuckffect of surface area and volume on the cell’s processe;mmomuq 0*e61q xa(mccsk /d8 s is false?

  Which statement best describes stem cell5fa)jbs3u 9 y99boon4xel grl1fr: *js?

  Which is a correct description of the cell try09s12 utk vb-8cabrype adapted for gas exchange in the luncb 9bry80rvtk2-a1 us gs?

  Which of the following explains 5q*xp2)te xbe+qm 2q jthe limitations on cell size?

  What is this cell's most likely primary function, and where could it qxs 9;tp4m y1 vbar.gdu.9 i6vbe located i9 ymx a1sr4btqiu6.vg dv;9.pn a mammal?

  Which of the following characbtti3b0 3iae4t/4mr;kk t5lkteristics of type I pneumocytes contribute to increasing the rate of gas exchange? 4atkt / i0t;ire5kb33l4bkm t
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/f a1r8s 2 c,noj-pand.ruue- of the functions of these ar8-fos1-nd p, n.u2 /uj recacells 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 muscle cells and striated c .:c/8iwbv4 s.cigd lmuscle fibrcvdi4.lsgi bw : c.c/8es?

Below is a diagram of a motor neuron. Neurons are the long07zu;hlj p l aa5of64iest cells in the human body. 64hp7jl o; 5al0fuzia
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffeuhyhi.p *y pf7suk).(r 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 alveoli structures. uy ih*fypu) (.pk h7s.


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 thc-7ry-n3 eski mx1/b 6wedm: oe tream n:sy/drx1- 6kewome7b- c3i tment of leukaemia?

  The table shows the diamet.m+ mzvam*,tzs0k*ssr:9 ;5 yc zzfpzers of red blood cells from different organisms. Which red blood cell will have the highest surface area to vf**y:zmm smzz5+0 r pk.tsz,;9 zsca volume ratio?

1.Explain how the shapez38c;feys6q / lm9 uwi of erythrocytes and cells lining the proximal convoluted tubule make these cells more adapted to the functions theywqc9i/s 3mz ;6euly 8f 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 ah; tlqi,)l m3ak iql(2nd specialised cells is/are not true? la3 q;l2,mil i qkht)(

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 thq o/a5qmqz,g6qrcf 1(e correct order from smallest to largest?m o1(/ aqczgq,qfq5 6r

  Which row in the following table gives the correct disa)xd om /xp4 /awxdz-1gydi6 /fdvantages of the different stem cell sources for therapexa//i4 x6o1 yzm )fp/dx wgd-dutic uses?

1.Describe how the use of stem cells8ssz/-xbni:d4f:d( ml ; vlkx may be used to treat type I diabetes in the fuxf( z;/4lk s:l:ndx8-vdsimbture.

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 scaly qd 0ini+b62he).

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

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