14 questions · 14 marks · ≈ 14 min
Extended Tier Only
Which of the following statements is a correct reason that humans sweat?
Choose your answer
To lose water through the surface of the skin.
To increase water loss from the kidneys.
To increase heat loss from the body.
To reduce blood glucose levels.
Extended Tier Only
Which of the following statements would not be a correct example of negative feedback?
Choose your answer
An increase in core body temperature when cold.
Vasoconstriction.
The release of a neurotransmitter at a synapse.
The control of blood glucose levels.
Which row of the table best summarises the parts of the nervous system?
| brain | neurones | spinal cord | |
|---|---|---|---|
| A | central | peripheral | central |
| B | peripheral | peripheral | central |
| C | central | central | central |
| D | peripheral | central | peripheral |
Choose your answer
Which of the following statements are reasons for the evolution of reflex arcs in the mammalian nervous system?
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1 and 3 only
1 and 2 only
1, 2 and 3
2, 3 and 4
Which row of the table best describes receptor organs and their respective stimuli in the human body?
| Skin | Ears | Nose | |
|---|---|---|---|
| A | pressure | sound | chemical (in solution) |
| B | heat | balance | chemical (in solution) |
| C | pressure | balance | chemical (vapours) |
| D | heat | sound | temperature |
Choose your answer
Which of the following statements would not be a correct example of negative feedback?
Choose your answer
An increase in core body temperature when cold.
Vasoconstriction.
The release of a neurotransmitter at a synapse.
The control of blood glucose levels.
The image below shows a simple reflex arc.
Which of the following sequences correctly shows the order of cells that an impulse passes through during a reflex action?
| first → last | |
|---|---|
| A | Z → X → Y |
| B | X → Y → Z |
| C | Y → X → Z |
| D | Z → Y → X |
Choose your answer
Extended Tier Only
Which row of the following table correctly describes what happens in the body after a person consumes a can of sugary drink?
| role of the pancreas | role of the liver | effect | |
|---|---|---|---|
| A | releases glucagon | converts glycogen into glucose | blood sugar levels rise |
| B | releases insulin | converts excess glucose into glycogen | blood sugar level falls |
| C | releases glucagon | converts excess glucose into glycogen | blood sugar level falls |
| D | releases insulin | converts glycogen into glucose | blood sugar levels rise |
Choose your answer
The image below shows a cell from the nervous system. The cell forms part of a reflex arc.
An impulse moves along the neurone from Q to P.
What structures would be found at P and Q?
| P | Q | |
|---|---|---|
| A | receptor | relay neurone |
| B | relay neurone | receptor |
| C | motor neurone | relay neurone |
| D | gland | relay neurone |
Choose your answer
Extended Tier Only
An athlete takes part in a marathon.
What would be the effect of an athlete taking part in a marathon race on a hot, sunny day?
| volume of water reabsorbed in the kidneys | volume of water lost from the skin | effect on hairs on the skin | |
|---|---|---|---|
| A | less | decreases | lie flat |
| B | more | decreases | erect |
| C | less | increases | lie flat |
| D | more | increases | lie flat |
Choose your answer
The image below shows the structures involved in a simple reflex arc.
Which of the following sequences correctly shows the order that an impulse passes through during a reflex action?
Choose your answer
S → U → V → T
S → T → U → V
S → V → U → T
T → V → U → S
The image below shows a cell from the nervous system. The cell forms part of a reflex arc.
An impulse moves along the neurone from Q to P.
What structures would be found at P and Q?
| P | Q | |
|---|---|---|
| A | receptor | relay neurone |
| B | relay neurone | receptor |
| C | motor neurone | relay neurone |
| D | gland | relay neurone |
Choose your answer
Extended Tier Only
Which of the following statements about glucagon are false?
Choose your answer
1, 2, 5 and 6
1, 3, 4 and 6
1, 4, 5 and 6
5 and 6 only
Which of the following statements about glucagon are false?
Choose your answer
1, 2, 5 and 6
1, 3, 4 and 6
1, 4, 5 and 6
5 and 6 only