Which of the following statements about the effectdc35 bl2 9mik5 g,n2xsteb0 uvm+pc9d of surface area and volume on the cell’s p5 +,p9d9m ni c kb2decv 3gu2xtl5s0mbrocesses is false?

  Which statement best describes9xi+9i6 gj ; qu4fdctu stem cells?

  Which is a correct description of th 9kl5ez,rzm; i13j wyve cell type adapted for gas exchange in the lungj w z91;,klmrzv e3i5ys?

  Which of the following explaijops4haq0l 433lj .ioxp q./dns the limitations on cell size?

  What is this cell's most likely primary function, and where8noj8 6iv3h,jq b1mnjdn 8/ne could it be located in a mammal? jq318/nnoj nv jeinbh868m d,

  Which of the following characteristics of type I pneumocytes cou7( :kzjdyh 2 t lh2nqn;v36dtntribute to increasing thez2nuqdt (hh76jk;2tl3n v y:d 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 bovi*zwc ;45s+knw .coone marrow transplant from a 36 year old. One of the functions of these cells is tocki; 5vw snooz4. +cw* 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 str8qe78-jl7 km nhqes+/h9rdqiiated muscle fibresq+hlsm8q e 7rhdnie89j -7 /kq?

Below is a diagram of a motor neuron. Neurodqgxvi n5bc5 .xj)h( (o90 nadd/wg8 ons are the longest cells in the human body. o9dcq 0n(n5djhgvx .x(/i od g a8b5w)
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer fro;zt5g pb,z3gem infant respiratory distress syndrome, whichz,3 ge gpt5bz; could be caused 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 cellsmbk 6s,2zw s(gp34je s are not used in the treatment of leuka 6swzp( sgm3s,e kj4b2emia?

  The table shows the dia,p pfa+ q qd,9:qcemn1meters of red blood cells from different organisms. Which red blood cell willf,p:,nc1+apqmd eqq9 have the highest surface area to volume ratio?

1.Explain how the shape ovp)nw2d; am,sf erythrocytes and cells lining the proximal convoluted tubule m2s m) w,d;pnavake 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 embryonixs kzx2e o;h6s4ni; ip ;vtmpd:4w0w2 c stem cells and specialised cells is/are not tru;24n;:xm 2o4ik ed06pixvstpws ;hw ze?

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 smalles,* d a,ny/vkxst to largest?snyavd xk* ,/,

  Which row in the following table gives the correct fvzk90;0ejwe ;9qr 4qbuxv -fdisadvantages of the different stem cell sources for therape w4u; x9;rq fkbejvf ve0z9-q0utic uses?

1.Describe how the usr+d s, 2my uqtp(btk b8j9k5vy. o/7sje of stem cells may be used to treat type I diabetes in the future.s2skv b8/m d +j5p(tqb 9ukot7 .yj,ry

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 tohc4r206z2l5ugs h ya x 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.