Podcast
Questions and Answers
What is a receptor?
What is a receptor?
- Movement of an organism in response to a stimulus
- A specific direction in which an organism moves in response to a stimulus
- Something that can be detected by an organism
- An organ or specialised cell that detects a change causing a stimulus (correct)
What is negative taxis?
What is negative taxis?
- Movement in random directions
- Movement towards the stimulus
- Movement away from the stimulus (correct)
- Movement towards areas with lower glucose concentration
Which response involves movement in random directions?
Which response involves movement in random directions?
- Negative taxis
- Chemotaxis
- Kinesis (correct)
- Positive taxis
In positive chemotaxis, mobile bacteria move towards areas with:
In positive chemotaxis, mobile bacteria move towards areas with:
What does a kinesis response aim to achieve?
What does a kinesis response aim to achieve?
Plants respond to external stimuli primarily to:
Plants respond to external stimuli primarily to:
What is the immediate consequence of sodium ions rapidly entering the cell membrane?
What is the immediate consequence of sodium ions rapidly entering the cell membrane?
Where are photoreceptors located in the eye?
Where are photoreceptors located in the eye?
What is the function of cone cells in the eye?
What is the function of cone cells in the eye?
Which structure controls the amount of light entering the eye?
Which structure controls the amount of light entering the eye?
Why is the point where the optic nerve leaves the eye known as the blind spot?
Why is the point where the optic nerve leaves the eye known as the blind spot?
What is the role of rods in vision?
What is the role of rods in vision?
What is the purpose of joints in the human body?
What is the purpose of joints in the human body?
Which type of muscle pair consists of muscles that pull in opposite directions?
Which type of muscle pair consists of muscles that pull in opposite directions?
What happens when the triceps muscle relaxes?
What happens when the triceps muscle relaxes?
Which type of muscle is under voluntary control?
Which type of muscle is under voluntary control?
What protein fibers run through muscle cells to increase their strength?
What protein fibers run through muscle cells to increase their strength?
What is required in extremely large amounts for muscle contraction to occur?
What is required in extremely large amounts for muscle contraction to occur?
What is the role of the accelerator nerve in relation to the heart rate?
What is the role of the accelerator nerve in relation to the heart rate?
Which part of the nervous system does the vagus nerve belong to?
Which part of the nervous system does the vagus nerve belong to?
How do chemoreceptors in the body affect heart rate?
How do chemoreceptors in the body affect heart rate?
What role do baroreceptors play in regulating blood pressure?
What role do baroreceptors play in regulating blood pressure?
What is the effect on heart rate when blood pH and pressure return to normal?
What is the effect on heart rate when blood pH and pressure return to normal?
Which nervous system is responsible for coordinating communication within the body?
Which nervous system is responsible for coordinating communication within the body?
What event occurs after the neurotransmitter diffuses across the synaptic cleft?
What event occurs after the neurotransmitter diffuses across the synaptic cleft?
What is the role of calcium ions in synaptic transmission?
What is the role of calcium ions in synaptic transmission?
Which ion enters the presynaptic neurone after the opening of sodium ion channels?
Which ion enters the presynaptic neurone after the opening of sodium ion channels?
What enzyme is responsible for breaking down acetylcholine into choline and ethanoic acid?
What enzyme is responsible for breaking down acetylcholine into choline and ethanoic acid?
What is the role of ligaments in the skeletal system?
What is the role of ligaments in the skeletal system?
What happens to acetylcholine after it is broken down by acetylcholinesterase?
What happens to acetylcholine after it is broken down by acetylcholinesterase?
