Zadanie 3a
Define a stem cell.
Cell specialization
Umiejętności w tym dziale
Umiejętności z tego działu sprawdzają 23 zadania wzorowane na arkuszach IB z lat 2022–2026. Dział pojawia się w 19 z 57 arkuszy w bazie.
Zadania z tego działu: 23 Otwórz w wyszukiwarce z filtrami
Zadanie 3b
Discuss where stem cells occur in an adult human and what they do.
Zadanie 10
A spherical cell grows while keeping its shape and the same membrane permeability. How do surface-area-to-volume ratio and exchange capacity per unit cell volume change? A. Both increase B. The ratio increases but exchange capacity per unit volume decreases C.…
Zadanie 10
Which outcome is consistent with the developmental potential of an embryonic pluripotent stem cell? A. It can form only one already specialized blood-cell type B. It must make an entire placenta as well as every embryonic tissue C. It can generate many…
Zadanie 10
An individual cell separated from a two-cell mammalian embryo can still generate both the embryonic body and the supporting extraembryonic tissues. How is its developmental potential classified? A. Multipotent B. Totipotent C. Unipotent D. Pluripotent
Zadanie 10
Early embryonic cells receive different concentrations of signalling molecules according to their positions. Which outcome can these gradients direct? A. Immediate loss of all chromosomes B. Replication of only the mitochondrial genome C. Development of…
Zadanie 11
Which statement accurately describes stem-cell potential? A. An adult blood-forming stem cell is multipotent B. A two-cell-stage blastomere is restricted to blood cells C. Every adult skin stem cell is totipotent D. A pluripotent cell can form only one mature…
Zadanie 9
The diagram shows several products of one adult stem-cell lineage. Which classification and location fit the cell? A. Multipotent; bone marrow B. Pluripotent; mature erythrocyte C. Totipotent; bone marrow D. Totipotent; circulating plasma
- Materiał graficzny
Zadanie 10
Which typical mature human cell has the largest volume? A. Sperm cell B. Erythrocyte C. Egg cell D. Small lymphocyte
Zadanie 5
Specialized neurons develop early in an embryo. State the process by which cells initially become neurons.