Homeostasis
This type of feedback mechanism helps maintain a stable internal environment by reversing changes away from the normal level.
What is negative feedback?
These glands release hormones directly into the bloodstream.
What are endocrine glands?
This process splits water molecules into hydrogen and oxygen during the light-dependent stage of photosynthesis.
What is photolysis?
This term describes a cell containing two complete sets of chromosomes.
What is diploid?
How many hearts does an octopus have?
What are three hearts?
This process removes amine groups from excess amino acids in the liver.
What is deamination?
This structure contains the cell bodies of sensory neurones in a swelling of a spinal nerve.
What is a ganglion?
These stacks of thylakoids are found inside chloroplasts and resemble piles of coins.
What are grana?
This type of cell division reduces the chromosome number by half, producing cells with one chromosome from each homologous pair.
What is meiosis?
What is the only mammal capable of true, sustained flight?
What is a bat?
These pancreatic cells release insulin when blood glucose concentration is high.
What are beta (β) cells?
Compared with the outside, the inside of an axon has this electrical charge when the neurone is at rest.
What is negative?
These clusters of photosynthetic pigments are located in the thylakoid membranes and absorb light energy.
What are photosystems?
This process occurs when homologous chromosome pairs orient randomly at the equator during meiosis I, creating genetic variation.
What is independent assortment?
Which animal can survive for days without its head, provided its body remains alive?
What is a cockroach?
When guard cells gain water by osmosis, they become this, causing the stomata to open.
What is turgid?
This principle states that a neurone either transmits a complete nerve impulse or does not transmit one at all.
What is the all-or-none law?
This technique separates substances in a mixture according to their different solubilities in a solvent.
What is chromatography?
This is a length of DNA that codes for the production of a polypeptide.
What is a gene?
What is the only food that supposedly never spoils?
What is honey?
This process involves the breakdown of glycogen into glucose, catalysed by the enzyme glycogen phosphorylase.
What is glycogenolysis?
According to this model, muscle contraction occurs when actin and myosin filaments slide past each other, shortening the sarcomere.
What is the sliding filament model?
This five-carbon compound combines with carbon dioxide in the first step of the Calvin cycle.
What is ribulose bisphosphate (RuBP)?
A woman whose father has haemophilia does not have the condition herself. She can pass the haemophilia allele to her sons. What is her genetic status called?
What is a carrier?
What is the national animal of Scotland, despite being a mythical creature?
What is a unicorn? 🦄