Flashcards
Biology B 2.1 Cells and simple transport
Flashcards do conjunto (11)
- 1name three parts of a animal cellCell membrane, Cytoplasm,
Ribosomes, Nucleus or Mitochondrion - 2Name four types of organism whose cells have a cell wall and explain the function of this.Plant, algae, bacteria, fungi
Strengthens cell - 3Give the functions of the following... 1. Nucleus: 2. Cytoplasm: 3. Mitochondrion: 4. Cell membrane: 5. Ribosomes:1.contains DNA: controls
activities of cell.
2.cellular reactions take place here.
3. releases energy during
aerobic respiration.
4.controls passage of
substances in and out of cell.
5.Site of protein synthesis - 4Give 3 things that can speed up the rate of diffusion.Bigger diffusion gradient (Conc. Diff)
Larger surface area
Shorter diffusion distance
Higher temperature - 5Give 3 special features of a sperm cell and explain how it helps the sperm function.Lots of mitochondria – release energy so
can swim to egg cell
Long tail – to swim to egg
Head tip containing enzymes – digest egg
jelly coat - 6What is the function of root hair cells and how are they adapted?To absorb water and nutrients.
Large surface area – speeds up
absorption (diffusion) - 7What is diffusion?The net movement of particles in a liquid or gas
from an area of high concentration to an area of
lower concentration down concentration gradient - 8What is unusual about the genetic material in a bacterial cell?Not inside a nucleus
- 9Which organelle would you expect muscle cells to lots of and why?Mitochondria
Need energy for contraction - 10Beta cells in the pancreas make lots of insulin, which is a protein. What organelle would you expect to see in high numbers?Ribosomes
- 11What is the function of root hair cells and how are they adapted?To absorb water and nutrients.
Large surface area – speeds up
absorption (diffusion)