Which of the following statements about the effect of surface area and volu:ur6fx5tp zl ;)pg b7mme on the cell’5;m lb:tpx 6rg 7pzf)us processes is false?

  Which statement best describes stem cellgy9dgi fg53r-.w4e wos?

  Which is a correct description of the cell type (qq5e(9j qsyb i:8oxx adapted for gas exchange in the lu8s : iqxbxeo( qjy5(9qngs?

  Which of the following explainli008cx b tp-1o*fotgs the limitations on cell size?

  What is this cell's most likely primary function, and wl**e 7)2 vxkhkav ezm4here could it be located in a ma4 )e l*a2hkemv7zx *vkmmal?

  Which of the following cjs-w mt (y+-adumzz3)haracteristics of type I pneumocytes contribute to increasing theztsmm3)+y- wa-( zd uj 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 marrow transplant from a 36 ye- 8rn3dp* ueldar old. One of the functions of these cells is to produce red and white blood cells. What type of stem cells has the patient receivedr8ld-u n3 *dpe?

  Based on the Venn diagram, which identifik- w*(ltj4 4m:x gllt(o pvzy0es cardiac muscle cells and striated musclegtzt(x my:p4(0l 4lj*kl-wo v fibres?

Below is a diagram of a motor8o 79rc)8k 4cs0 aefxxmdah/j neuron. Neurons are the longest cells in the human body. a xmce 8x7osa k8f d9jcr/)40h
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies som4z + wy6pv4cfbed viq9-i,iy-m7bm0y etimes suffer from infant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. Thei 7v4c9 0,qyzd4-ybiy+ mb-mwip v6fe 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 isfbun;9d- 3y id a reason that embryonic stem cells are not used in the treatment of leuka-d;uny bdf3i 9emia?

  The table shows the ddv a cxbn54xpm o7.61yiameters of red blood cells from different organisms. Which red blood cell will have the highest surface area to voocxv.xd 6pa71n 5y4b mlume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximal m:8br cy/cs6s convoluted tubule make these cells more adapted to the6/s c8cb:smr y 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 abo *sacq.0 l:hyout embryonic stem cells and specialised cells is/are not true0 s.a q:ocly*h?

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 h97 tx k5v1r7epq4mudpnms1 2 correct order from smallest to largest?211mn4 rs7mph xq5 9dk7tuvep

  Which row in the following table gives the correct disadvantages of the difb+lnkr(u y ,kx+p):- uvw 6khaferent sn+: bhvl) y(uw-,r+xkuak 6pktem cell sources for therapeutic uses?

1.Describe how the use of stem cells may be used to treasg0ixycm9o do- ur7u ;a5oh;-t type I diabetes in theh;c5 x ad; 9sygr-oiu-uo7m0 o 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 sc9d df)h2l ee6owm.6bsale).

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

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