Which of the following statements about the effect of surfa9qll e fw.;u)z xf4n*vce area and volume on the cell’s processes is falsezfllxen v4;. uq9*w) f?

  Which statement best describesrqj g z:xoi88(3op v4z stem cells?

  Which is a correct description of the cell typea34 li6,z e3epgilw:r adapted for gas exchange in the lung6zawrpe:3 ig3,ll4i e s?

  Which of the following explains the limit )js f+w jd, z6+xiwne(/mxzx-,jav9eo -o8fkations on cell size?

  What is this cell's most likely primary function, and where could is d,p+nm )8dxgm7 ot7kt be located in a +7tgm)p7m ondsk 8d,xmammal?

  Which of the following characteristics of typ okn)tiyp .ow8 7.od9te I pneumocytes contribute to incredn79 iop.)t.ky8oo w tasing 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 year old.2a:p xj(r*d(ct8r af oc/p wn. One of the functions of these cells is to produce red and white blood cells. What type of snxr8ra*(f cot/p( p.dc2 w a:jtem cells has the patient received?

  Based on the Venn diagramcvf -c m+k1v1h lvwf98, which identifies cardiac muscle cells and striated musck9 lvv1cw fm+1fchv-8 le fibres?

Below is a diagram of a motor neuron. Neurons are the longe85 qam4 yryk gzm:k56cst cells in the human brm6k5a mcy5k:qgy z48ody.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from x 0lop5 uzhf1z,z5 oo:infant respiratory distress syndrome, which could be caused by a lack of sufficient surfactz1fu5p ,oho5: zl0oz xant 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 t.o 97zi,c2kh .cmhul7s 1leuthat embryonic stem cells are not used in the treatmlc.k z7oh1,h9 uleui2tsc7 . ment of leukaemia?

  The table shows the diameters of red blood cells from different organisms. Whichl-:q/ryf0 5s 0 qyw26kfstgsj red blood cell :qs lj2ks50fyysq0w 6-gr/t f will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximkw1h:rdh(k.(f / tyuk al convoluted tubule make these cells more ad1y fdh(r: kku(t /.wkhapted 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 cells is/are not trukw + p-/xtfatu*(g ;jee? p/t ej uk-;txafw+g*(

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 smal jk;vr uh /,sy*cbrof6e8n/(/a+vzlklest to largest?f8yre b,/ruv/ v*6oc ksajk (;hz l+/n

  Which row in the following table gives the correct disadvan c55xg;at9a*ea0oy zntages of the different stem cell sources fo c0a55yeoxna;a*gz 9 tr therapeutic uses?

1.Describe how the use ort vn6 4i5nm-wf stem cells may be used to treat type I diabetes in the vr4nim5 t6w-nfuture.

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 specia8s yq er+yvq0,lised cells (not 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.