Cells and Oraganelles
What organelle is the site of aerobic respiration?
Mitochondria
What process produces glucose in plants?
Photosynthesis
What is the main function of the respiratory system?
What is homeostasis
What colour is Mr Alberti's lanyard?
Rainbow
What are the names of the two organelles which surround the outside of a plant cell?
Cell membrane
Cell wall
What is the movement of water across a semi-permeable membrane called?
Osmosis
Which type of cell lacks a nucleus?
Prokaryotic cell
What hormone lowers blood glucose levels?
Insulin
How many metres of small intestine does an adult have?
Approx 6m
Name the three major classes of molecules found in the plasma membrane according to the fluid mosaic model.
Phospholipids, proteins, and carbohydrates.
What is the part of the nephron which absorbs water back into the blood?
The collecting duct
What is the xylem and phloem reponsible for?
Phloem - food/nutrients
xylem - water
What are the three main components of a negative feedback system?
Receptor, control centre, and effector.
How many students do we have in our class on the role?
22
Which three structures are found in all cells?
Cell membrane, cytoplasm, and genetic material (DNA).
What are the four factors that can affect the rate of enzyme activity?
Temperature, pH, substrate concentration, and enzyme concentration.
What structures in the lungs are the primary site of gas exchange and what surrounds them?
Alveoli surrounded by blood capillaries
Explain how sweating helps maintain homeostasis.
Evaporation of sweat removes heat from the body, lowering body temperature.
What is the difference between reliability and validity?
Reliability - If someone else did your experiement, what could cause them to get different results?
Validity - How well does the experiment answer the research question?
Which type of muscle tissue has the highest concentration of mitochondria?
Cardiac (heart) muscle tissue
During vigorous exercise, breathing rate and heart rate both increase. Explain how these responses help maintain cellular respiration.
They increase oxygen delivery and carbon dioxide removal, supporting ATP production.
A student says, "The larger an organism becomes, the easier it is to exchange materials." Why is this incorrect?
As size increases, surface area-to-volume ratio decreases, making exchange less efficient.
Explain the role that ADH plays in osmoregulation?
Teachers discretion
How old will Mr Alberti be this year?
34