Which of the following statements a xoy m-j/;-dpdbout the effect of surface area and volume on the cell’s processes dmxo-dp;- jy/is false?

  Which statement best describes stem n 5 u9uk1op2-xfhab 7tyc5w w2cells?

  Which is a correct description of the cell type adapted for gas exchange in t3(xds9)2iuws ax em)k i(p+ gthe lung(us ) idw2gmxtkx9sie()3 a+ps?

  Which of the following ecmx 38*4pwu mp3dy;k ok9dofdo9q/) sxplains the limitations on cell size?

  What is this cell's most likely primary function, and wherkz0*qp ga: *d9v(0dcmx uml1e e could it be located in a m*1zdpmg 0(c maq:dlxv9e *k u0ammal?

  Which of the following characteristics o4)oauryp4 1lv f type I pneumocytes contribute to increasing the rate of gas exo4 4)lv pary1uchange?
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 fromy /m,:lbpo6d s a 36 year old. One of the functions of these cells is to prool6m:,py/ dsbduce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac mub9)g :8tuiw0fy7 pq ehs-r 8puscle cells and striated muscl 7) r8ybfgpup e0h-s9 i8u:qtwe fibres?

Below is a diagram of a motor neuron. Neurons are the longest cells y+)fuq2boca 2 in the humanoy2fu2aq c) +b body.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from i1t;i* gijsow s93h5hznfant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the ssiow*5h9t3jg1h iz; 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 ster/9djtlck3rb9 ;;k e km cells are not used in the treatment of ;9rjb/le9dkc; t3rkk leukaemia?

  The table shows the diameters of red blood cells from difmr2jckw : 7x1uferent organisms. Which red blood cell will have the highest surface area to volume r rc:jk xu12m7watio?

1.Explain how the shape of erythrocytes and cells lini de 9cr /o-h8(uayq.ajn cb4y/ng the proximal convoluted tubule make thesedj89b(- o/a ruce yya.n/q4 hc 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 oudmt6w61p:0319x sfdf p puxembryonic stem cells and specialised cells is/are not true0196xmwp dp16 uso tpfu:3 fdx?

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 largest1x nu6v/-gg1 kh7tlnw ?tvn1wunhgx-l61/gk7

  Which row in the following table gives tqd:,)2a6fjodqum0pp ih . 6rz he correct disadvantages of the different stem cell sources for therapeutic useshq uj6 df)2 dir0z mqo6:,.app?

1.Describe how the use of stem cells may be used to treat type I diabetesv9,fvy ef mvq4w;4wqwo; /+do in the futurvvw /of,v4e+ dmwyqo 49fq;w; e.

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). ;laukz)q/g4s2 b7zkx705 ht+fh adcm

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

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