Which of the following stateql4z81r, s)wfv (tq kkments about the effect of surface area and volume on the cvr4()klf,skqwzq 1 t 8ell’s processes is false?

  Which statement best describes stem k7j4 gin70vxrcells?

  Which is a correct description of the cell type adapted .gav h9:brt2pc nu.2 //sn3s x nxdlb+for gas exchange in the lungspc2 vus/x+ 2btlxd.3n n r9s.:ab/ghn?

  Which of the following explsv c-9x4)8t ;c-99e tiew yoijqs:hfhwv81hmains the limitations on cell size?

  What is this cell's most lik k/4g7potod)o ely primary function, and where could it be located koog) /t74 dpoin a mammal?

  Which of the following characteristics of type I pl4izsy r5mp nypx7/2 6neumocytes contribute to increasing the rate of gas exc5ny/7zli sr2 yp4mx6phange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone marrzo,vboj ;k034te5w itow 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 cewtb 4oe0ok ;3, itzjv5lls has the patient received?

  Based on the Venn diagrametj;6x4cdm itb4p 40e, which identifies cardiac muscle cells and striated muscle fibej;x6ibpm440ec 4td tres?

Below is a diagram of a motor neuron. Neurons are the loze2:ket b9khl/2 h.lzngest cells in the human b:9e/ lzlkzk 2e.b 2thhody.
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 distress synij 6a; v53xtkvdrome, which could be caused by a lack of sufficient surfactant in the pulmonary xk3vi5atjv ;6 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 cells are not used in the/ ubutf vy;-d0(ivo/z treatment tyu; 0 /uv-biz(v o/dfof leukaemia?

  The table shows the diameters of red blood cells from different organisms. Whw8d32j w0 ogetich red blood cell will have the highest surface area to volum2dwet 80woj3g e ratio?

1.Explain how the shape of erythrocytes and ceyfvee*n.00yi3d q sh3lls lining the proximal convoluted tubu 00yef3q di.v*hny3e sle 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 embryoni pjq+ina g;n)is /c/e+l2un 2ac stem cells and specialised cells is/are not true? i gcu /)peai lqa2nnj+2ns+ /;

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 followinyx**gex h g4y2/opv t(g is the correct order from smallest to largest? *ty( x/*g ehox2gpyv4

  Which row in the following table gives the c)o6.(s jwheo;xuv,nte. )ef yorrect disadvantages of the different stem cell sources for therapeuticoeht(eoe;)sn ju. xw y fv6,). uses?

1.Describe how the us:ue8 hmqcq 9(zpn7jz )e of stem cells may be used to treat type I diabetes in the future(:mzq uqnh98z7p c e)j.

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 spep yj:.i95ogln 38perc cialised 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.