Which of the following statements about the effect of surface area and vol/z jctkih p e:mw:v3*n /mca+,ume on thj,htncmw : k*ami:3+v/ cp/zee cell’s processes is false?

  Which statement best describes stem cteuthpif 9n cr -a(f j1(4,ii1ells?

  Which is a correct description of th09meg7126r xk ytvpt )/hdy fke cell type adapted for gas exchange in the luke1dfv02t kgxt)y rmy67p /9h ngs?

  Which of the following explains the limitations on cell sizey33 tw iv;m:jl?

  What is this cell's most likely primary f+x26v .vntfwi 0( bcsaunction, and where could it be located in a mams fwaxit(c6.bn+vv 20mal?

  Which of the following characteristics of type I pneumocytes contri.sup +oq +ofb7bute to increasing tspuo+ +7 fobq.he 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 amrha, i,(w4ed 36 year old. One of the functions of these cells is to produce red and white blood cells. What type of stem cells has the patien4ei (,mahrw,d t received?

  Based on the Venn diagram, which identifies cardiac muscle ceg) q +,kgpd,3gbxmr4 xlls and striated muscle fidbg+rpx3k ,g, qg )x4mbres?

Below is a diagram of f zg7:b edv+3c ( mso,xur)g0wa motor neuron. Neurons are the longest cells in the human body.bvr z 3, +:g(wf mgdu7xe)0cso
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 di s9ao4v;hnix;;9n whod ft 2*rstress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different alveoli d;;oxt o;hwr9a4* s f9nhnv i2structures.


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 reat+. -w1ol p6z so*inwnson that embryonic stem cells are not used in the treatment*-w.i+pt o1wn onz ls6 of leukaemia?

  The table shows the diamem /kgb0n 7v aulgj6+u2ters of red blood cells from different organisms. Which red blood cell will have the higu lj6 /+7vnmgkb ag02uhest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximal convoluvge13ku3x q z*ted tubule make these cells more adapted to the functions vxk uqzg*13 3ethey 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 rgr*k 093p9t qdqshj2lza)txh3( hm3 embryonic stem cells and specialised cells is/are not truh3m 39(*rsr3zgal 0)khdhtqx9 jp2t qe?

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 yi /c7c33tmuon71rgzzv+ +syfrom smallest to largest?c 73zrgi7/unyy3mz v+1tco +s

  Which row in the following table gives the correct disadvantages of the di,3f.4 eac 8j;zqutkp*scb e u-fferent stem cell sources for ther -ea fz4k*ue8 u.;jccsq,3 ptbapeutic uses?

1.Describe how the use of stem cells may be used to treat type I diabebtm*c2 j b1gz5ajr* yr*mkv;4tes in the future. z1km2*cb*j4v jm;r *gr ya5tb

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 speciaqg)z/ ils fiycg2 *-e0lised 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.