Which type of neurone transmits a signal from a receptor to the central nervous system (CNS)?
Sensory
Association
Motor
Which type of neurone transmits a signal from the CNS to a muscle?
What is a synapse?
A type of reflex action.
A gap between two neurones.
The long fibre in a nerve cell.
Which part of the CNS is not involved in producing reflex actions?
Brain
Spinal cord
Receptors
How do hormones like insulin travel around the body?
In the nerve cells.
In the bloodstream.
In a gland such as the pancreas.
What effect does insulin have on blood glucose concentration?
It increases the concentration of glucose.
It increases the concentration of sucrose.
It decreases the concentration of glucose.
What happens when blood glucose levels become too high?
Insulin is secreted, causing the conversion of glucose to glycogen.
ADH is secreted, causing the conversion of glucose to glycogen.
Insulin is secreted, causing the conversion of glycogen to glucose.
What is phototropism?
A response to light.
A response to gravity.
A response to temperature.
Where is auxin made in a plant?
In the older part of a stem or root.
In all cells.
In the growing tip of a stem.
When exposed to unilateral light, which side of a stem contains more auxin?
The shaded side.
The illuminated side.
Both sides contain the same amount of auxin.
What is the benefit of phototropism?
Increased respiration.
Increased photosynthesis.
Increased production of auxin.