B3 Flashcards
moving and changing materials
what is the name of the process in which particles move from regions of high concentration to regions of low concentration?
Diffusion
what type of enzyme would digest fats?
lipase
what are cell walls made out of?
cellulose
what is the name of the process by which water moves into cells?
osmosis
complete the word equation for photosynthesis:
water+__________ ——-> __________ + oxygen
Carbon dioxide
Glucose
give TWO reasons why single-celled organisms, like algae, do NOT need complex structures for gas exchange?
Large surface area to volume ratio
direct contact with the environment
name the blood vessel that transports blood from the body to the right atrium.
Vena Cava
Do 4 bullet points describing the route taken by oxygenated blood from the lungs to the body cells
- oxygenated blood flows from the lungs into the left atrium of the heart via the pulmonary veins
- It is then pumped from the left atrium into the left ventricle
- The left ventricle contracts, pushing the blood into the aorta, the body’s main artery
- The aorta distributes the oxygenated blood through arteries and capillaries to reach body cells
Give 6 ways in which villi and the alveoli are adapted to absorb molecules into the blood stream
- large surface areas
-thin walls
-rich blood supply
-moist surfaces
-microvilli
-close proximity to blood vessels
why is protein needed by the body?
proteins provides the body with growth and repair
which organ in the human digestive system produces protease?
A. Gall bladder
B. Large intestine
C. Liver
D. Stomach
D. Stomach
what does Flaccid mean in a plant cell?
when the water moves out the cell by osmosis and the vacuole shrinks.
what does Turgid mean in a plant cell?
when water enters the cell by osmosis and fills the vacuole. This pushes against the inelastic cell wall.
what is a catalyst?
substances that increase the rate of chemical reactions without being used up
what is the lock and key model?
The lock and key model describes how an enzyme (the lock) binds specifically to a substrate (the key) because they fit together perfectly. This interaction allows the enzymes to carry out its function.
