Questão 1
Questão
The diagram represents a simple reflex arc.
What is the sequence of nerve cells through which an impulse passes during a reflex action?
Responda
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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)
Questão 2
Questão
The diagram shows a neurone. Which structures could be found at X and Y?
Questão 3
Questão
What will be the effect of strenuous exercise on the volume of water lost through the skin and the kidneys?
Questão 4
Questão
The diagram shows a section through an eye.
Which structure controls how much light enters the pupil?
Questão 5
Questão
What are the effects of adrenaline?
Responda
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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
Questão 6
Questão
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?
Responda
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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
Questão 7
Questão
Which organ produces a hormone?
Responda
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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
Questão 8
Questão
The diagram shows the structures involved in a reflex action.
What is the sequence in which impulses pass through these structures?
Responda
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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
Questão 9
Questão
Which part of the human eye is sensitive to light?
Responda
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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
Questão 10
Questão
The diagram shows an experiment to investigate the response of a plant stem to gravity.
What is a suitable control for this experiment?
Questão 11
Questão
Why do mammals sweat?
Responda
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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
Questão 12
Questão
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?
Responda
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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
Questão 13
Questão
The diagram shows a capillary loop in the skin of a mammal.
What will the capillary loop look like if the mammal becomes cold?
Questão 14
Questão
The diagram shows muscles and bones in a person’s arm.
What happens to the muscles as the weight is lowered?
Responda
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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
Questão 15
Questão
The diagram shows the density of rods and cones across a horizontal section of the retina.
What is the position of the optic nerve?
Questão 16
Questão
What are the effects of insulin and glucagon on the concentration of blood glucose?
Questão 17
Questão
How does the skin react when the body becomes very warm?
Questão 18
Questão
Which diagram shows a sensory neurone?
Questão 19
Questão
The diagram shows the muscles that control the size of the pupil in an eye.
How do the muscles make the pupil smaller?
Questão 20
Questão
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?
Questão 21
Questão
What would be the pupil size and lens shape of a person reading a mobile phone text message in a brightly-lit room?
Questão 22
Questão
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?
Responda
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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.
Questão 23
Questão
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?
Questão 24
Questão
Which response is a result of geotropism?
Questão 25
Questão
Which target organ releases glucose into the blood-stream as a result of the action of adrenaline?
Responda
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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