Which of the following statements about the effect of surface6:7z3h6nizhzqx ke 7 k area and volume on the cell’s processes is z6hz6:kn73k 7 hxiezqfalse?

  Which statement best descri6.g 7k*o k 0flz*pydydbes stem cells?

  Which is a correct description of the ce lg.vuzl8o (lk-9cgj: ll type adapted for gas exchange in the lungs? (-kll :gjo 9zlcvgu8.

  Which of the following explains the limitationsf8njl if4i..w *44mq;lhlk t3h(c f vc on cell size?

  What is this cell's most likely primary func 36kmcu/ h qg.ms.al2t6o boi .on5)botion, and where could it be located in a mammanao 6cl3i)bkho. 6 o.u 5b2ots./mmgq l?

  Which of the following characteristics of type I pneumocytes contribhd py,.2yzuel df,u3r -pn48zute to increasiry -y p,.8e2, 3zflzupunh4ddng 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 mae93b.om hz .murrow transplant from a 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 patien.e9obz hmu3m .t received?

  Based on the Venn diagram, which idenwktx./q4zauha90+s j- k,ih ctifies cardiac muscle cells and striated muscle fibresuwhi a9k4/ts-0xc,a.jkz+ h q?

Below is a diagram of a motor neuron. Nefo5 iot642msv urons are the longest cells in the human ftv s25m4 6ooibody.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometil6msu e :y1rwbb5,n zg6)kw (tmes suffer from infant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shl56zw tb nmwyugb(:sr) ,ke61ows 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 eylc+a1 xkre mm8e ns /1.:i*r 1c,awhymbryonic stem cells are not used in the.ny c,r1h yrmem s:w1 *il+exa1/ akc8 treatment of leukaemia?

  The table shows the diameters of red blood cells from+ds(gh:7 . ,mepuy2au xtqj o8 different organisms. Which .aeqh,g 7u um+:2xst8p dj(yored blood cell will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes andjw5i0wem q v5bc1 mh51 cells lining the proximal convoluted m15m qw vw0hj51bci5etubule make 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 embryonic stem cells and specialised cells is/arpvbcfpf/0ef oww 5bh;7s t. 3/e not true?c5pb/f7wspwt3/ fhe o f;0bv.

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 ort0g:i6vq( qdgqvxau-mt 50 3sder from smallest to largest? :t- 3muxs(5td6vi vq0gga0q q

  Which row in the foll ufw9wnx(k 8r/u-z,ccowing table gives the correct disadvantages of the different stem cell sour n zw8-wxu f(9crck/,uces for therapeutic uses?

1.Describe how the uoh+hp3 v/o. cm;yix3v se of stem cells may be used to treat type I diabetes in the f c .vy+o/3h; 3oxmihvputure.

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 tosd7lip 22vo*3y;z/nwrj p+ e 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.