Frage 1
Frage
The diagram represents a simple reflex arc.
What is the sequence of nerve cells through which an impulse passes during a reflex action?
Antworten
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A (First) P --> Q --> R (Last)
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B (First) Q --> R --> P (Last)
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C (First) Q --> P --> R (Last)
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D (First) R --> P --> Q (Last)
Frage 2
Frage
The diagram shows a neurone. Which structures could be found at X and Y?
Frage 3
Frage
What will be the effect of strenuous exercise on the volume of water lost through the skin and the kidneys?
Frage 4
Frage
The diagram shows a section through an eye.
Which structure controls how much light enters the pupil?
Frage 5
Frage
What are the effects of adrenaline?
Antworten
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A Breathing Rate: decreased; Pulse Rate: decreased
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B Breathing Rate: increased; Pulse Rate: increased
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C Breathing Rate: increased; Pulse Rate: no effect
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D Breathing Rate: no effect; Pulse Rate: increased
Frage 6
Frage
A person has been sitting in a room at 35 °C for 30 minutes.
What would be the effect of then drinking several glasses of iced water?
Antworten
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A Blood Temperature: falls ; Rate of Sweating: falls
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B Blood Temperature: falls ; Rate of Sweating: rises
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C Blood Temperature: rises ; Rate of Sweating: falls
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D Blood Temperature: rises ; Rate of Sweating: rises
Frage 7
Frage
Which organ produces a hormone?
Antworten
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A heart
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B lung
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C ovary
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D spinal cord
Frage 8
Frage
The diagram shows the structures involved in a reflex action.
What is the sequence in which impulses pass through these structures?
Antworten
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A P → S → R → Q
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B Q → R → S → P
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C Q → P → R → S
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D S → P → Q → R
Frage 9
Frage
Which part of the human eye is sensitive to light?
Antworten
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A iris
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B lens
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C optic nerve
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D retina
Frage 10
Frage
The diagram shows an experiment to investigate the response of a plant stem to gravity.
What is a suitable control for this experiment?
Frage 11
Frage
Why do mammals sweat?
Antworten
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A to cool the body
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B to lose water vapour through the skin surface
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C to release energy through the oxidation of glucose
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D to remove glucose from the blood
Frage 12
Frage
The diagram shows a section through part of the human eye.
When a person looks at an object which is far away from their eye, which of the following happens?
Antworten
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A suspensory ligaments: slacken; lens: becomes fatter
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B suspensory ligaments: slacken; lens: becomes thinner
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C suspensory ligaments: tighten; lens: becomes fatter
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D suspensory ligaments: tighten; lens: becomes fatter
Frage 13
Frage
The diagram shows a capillary loop in the skin of a mammal.
What will the capillary loop look like if the mammal becomes cold?
Frage 14
Frage
The diagram shows muscles and bones in a person’s arm.
What happens to the muscles as the weight is lowered?
Antworten
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A Biceps: lengthens; Triceps: lengthens
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B Biceps: lengthens; Triceps: shortens
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C Biceps: shortens; Triceps: lengthens
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D Biceps: shortens; Triceps: shortens
Frage 15
Frage
The diagram shows the density of rods and cones across a horizontal section of the retina.
What is the position of the optic nerve?
Frage 16
Frage
What are the effects of insulin and glucagon on the concentration of blood glucose?
Frage 17
Frage
How does the skin react when the body becomes very warm?
Frage 18
Frage
Which diagram shows a sensory neurone?
Frage 19
Frage
The diagram shows the muscles that control the size of the pupil in an eye.
How do the muscles make the pupil smaller?
Frage 20
Frage
What would be the effects of vasodilation and sweating on the body temperature and on the amount of moisture on the surface of the skin?
Frage 21
Frage
What would be the pupil size and lens shape of a person reading a mobile phone text message in a brightly-lit room?
Frage 22
Frage
The table shows a student’s water losses on a cool day.
On a hot day the student’s water intake was the same as on the cool day.
On the hot day, which water losses would increase and which would decrease?
Antworten
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A increase: in sweat; decrease: in expired air.
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B increase: in sweat; decrease: in urine.
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C increase: in urine; decrease: in faeces .
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D increase: in urine; decrease: in sweat.
Frage 23
Frage
After a meal containing carbohydrates, which row shows the changes in concentration of glucose
and urea in the blood as it passes through the liver?
Frage 24
Frage
Which response is a result of geotropism?
Frage 25
Frage
Which target organ releases glucose into the blood-stream as a result of the action of adrenaline?
Antworten
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A adrenal gland
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B kidney
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C liver
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D pancreas