Which of the following statements about tf5 q hmip72)oihe effect of surface area and volume on t ) i7h2mq5pfoihe cell’s processes is false?

  Which statement best describes strhwhmcbw*..; em cells?

  Which is a correct description of the cell ty5khq+ usqz-pr w(v9 f7pe adapted for gas exchange in the (k rp-5hqzfuv7qw+ s9lungs?

  Which of the following explains the limmk b7bybi/6 22vjo cv:itations on cell size?

  What is this cell's most likely pzy0)y dhfnf qu, 37d1l;mzj ,yrimary function, and where could it be located f7 u;zynym 3fjyh0,qdlz 1,)din a mammal?

  Which of the following characteristics of typee s.a(m(tta2 p I pneumocytes contribute to increasing the rate of gas exchangm(e2tapta (s .e?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone u/bi, /7ekg:0knug jw marrow transplant from a 36 year old. One of the functions of these cells is to produ0 , kggeu:b/inj/u7wk ce 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 c0 h1ni0q*ec dstriated muscle fibres? c0 e*0nhdciq1

Below is a diagram of a motor neuron. Neurons are the lorso 1u5su)cq9+4imr d ngest cells in the human body. q9smuu+)ir sr4dco 15
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from i:rlvq1f 7l mp0nfant respiratory distress syndrome, which could b m7:0flp qv1rle 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 068nc3 hgo0tuter3 j uthat embryonic stem cells are not used in the treae30u trn0jtg6hc o3u8 tment of leukaemia?

  The table shows the diameters of red blood cells frs dcc3d jblgx, 15dh5.om different organisms. Which red blo5d53d l. bc1,jdg sxchod cell will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining / do+xowfawzsi86) .ythe proximal convoluted tubule make these cells more adapted t xw+ofy) .a/s6zo8diwo 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 embrgld+3 b/ wak2tyonic stem cells and specialised cells is/are not trubwkd3l2/+g ate?

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 smallest to largestw 2+n )5dwzae..ndh a7tfrz s8?an2dn.ah d7frt8 wz + ewz.)5s

  Which row in the following table gives the correct disadvantages . -eti y ukz59jgz hv9jpm*(95 bgvd2eof the different stem cej gmzz95ipe v u5-.hyd g*b99jk2t(vell sources for therapeutic uses?

1.Describe how the use of stem cells may be used to treavl)zwjr o0f42rn 7y8p t type I diabetes in the flr8vo2 4y zwn0j7 pr)future.

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 scale).vlm7vz3u :v2x2 a.p6e prjfa7

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

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