Which of the following statements about the efpkbpa;mu(c pbys+3 88fect of surface area and volume on the cam3busb 8k pyp+(;cp8 ell’s processes is false?

  Which statement best describ -sqzt)fkbej y5730zies stem cells?

  Which is a correct descripten 5j8z emj-5kion of the cell type adapted for gas exchange in the 5 kj-mz en85jelungs?

  Which of the following explains tn 6+9 v pjlxw)f9z;njche limitations on cell size?

  What is this cell's most likely primarc g59y;b6t7y45 b uh ihydv3kry function, and where could it be located iy5h; 5gty 3 9r7h46cdykvubibn a mammal?

  Which of the following characteristick3bo0i:+ x ysws of type I pneumocytes contribute to increasing the rate of gas exch k:w3xs+o0biyange?
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 from a 36 year old. One of the funclb /kpj fi2a 7:s(stz.tions of these cells is to produce red and white blood cells. What type of stem cells hask7sb t:/i. jlfsap2z ( the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells andt7xzf1alfq w s(*ty)y2k* )um striated muscle)ulyt7 tfqw 12*f mskyxz )a*( fibres?

Below is a diagram of kups8bjup(3 57s.jb /5vgch h5y z9jia motor neuron. Neurons are the longest cells in the human bodp hb /.psj9(guhb sc8 j3jz7y55 iuv5ky.
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 syndrb2rk z1r9f 0mtome, which could be caused by a lmtkz2rf1b0 r9 ack 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 embt:/kkukjn t(1 ryonic stem cells are not used in the treatment of lej/:1tn ut(kk kukaemia?

  The table shows the diameters of red blood cells from different organisms. Wz n)i6tr ofjq.)q 0ho)hich red blood celi )q nfh).oqro )0t6zjl will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the1ey,ds(g/kqwz : epjs /5u+yj proximal convoluted tubule make these cells pjqy+ede(g w, s/ju y/s1z:5k 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 an; -.dh(px2 m dm apgntus71a*jd specialised cells is/are not trug d(a*pmntjx1;m. -d 2h supa7e?

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 )wc2cz p/ ok5md2vjg3 smallest to largest?vj)/k d zc2g c5pm23ow

  Which row in the following table gives the correct disadvantages of the diffq5nw2e q0t*kr:n 24qar c4yn rerent stem cell sources for therapeutic use*4w 0rrqatcn2 e :qkq24n5yrns?

1.Describe how the use of stem cells may be used to treat g0i40j,65 +eam r2eqr-t(uonnjwbq 6 apv; vl type I diabetes in the future.ar 0j64nvb oj;5-rw0 tu ,26iqg v aeelm(q+np

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).o1a(p,2ttexm

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

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