SA - 1 Prep Flashcards
What are 2 features of prokaryotes?
- unicellular
What is the function of flagellum?
Move mucus
How does vaccination help?
- Produces antibodies
- Makes the noddy immune
What are the advantages of assexual reproduction?
- No mate
- Large production
What are the disadvantages of assexual reproduction?
- No variation.
- Cannot survive in habitats.
What are the advantages of sexual reproduction?
- Variation
- Will survive in habitats
What are the disadvantages of sexual reproduction?
- One mate cannot increase population.
Which part of the cell prevents turgor presssure?
Cell membrane
Which part of the cell controls?
nucleus
Which part of the cell does chemical reaction take place?
Ribosomes
Define cells.
Single unit of life.
Define tissues.
Multiple units of life.
Define Transpiration.
- Removes excess water.
- Keeps leaf cool at optimum temp.
Which organ does peristalsis take place?
oesophagus
Which organ does protein digestion take place?
Stomach
Which organ does insulin production take place?
Pancreas
Which organ does partial digestion of bile take place?
Duodenum
Which organ absorbs most water in?
Small intestine
where is lipase secreted?
Pancreas
Where is protease secreted?
Pancreas.
Where is amylase secreted?
Salivary glands.
Which hormone increases concentration of glucose?
Adrenaline
What is emulsification?
- Mechanical process
- Breaks down large fat globules into smaller droplets.
What happens to the seal wound in the skin and repair tissues? Name only the steps
- Homeostasis
- Inflammation
- Tissue Repair
- Angiogenesis
- Remodelling
What happens in Homeostasis?
- Blood vessel constrict
- Platelets are forms a temporary plug.
What happens in inflammation?
- WBC migrate to site of injury and help in tissue repair.
What happens in tissue repair?
- Fibroblast produces collagen and protein that forms new tissues.
What happens in angiogenesis?
- New blood vessel is formed
- Angiogenesis form for cell growth.
What happens in remodelling?
- Remodels new tissue and improves appearance.
Why are enzymes essential for biological processes?
- Biological catalyst (Speed up reactions)
- Highly specific (Designed to catalyze particular enzyme)
- Regulated (Control how enzymes function)
- Complex chemical transformations (Crucial for conserving energy in living organisms)
- Used repeatedly
- Maintain internal environment (Homeostasis)
- Carry out various other sustaining processes. (Repair cellular structure.)
What is the role of insulin?
Lowers blood glucose
What is the role of glucagon?
Raises blood glucose.
What is the regulation of blood glucose level of insulin and glucagon an example of?
Negative feedback loop
What maintains the internal stability of internal conditions?
Negative feedback mechanism.
