When you are too hot or too cold, the brain sends nerve messages to the skin to do several things. Which one of the following is a response used to control body temperature?
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Tiny hairs on the skin can be raised and lowered by small muscles
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Blood vessels in the skin can be dilated or contracted
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Glands in the skin are stimulated to release greater quantities of natural oils onto the surface of the skin
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Glands in the skin are stimulated to release sweat
Q.2.
In a reflex action, what do we call the type of neurone which allows the message from the receptor to go directly to the effector without needing to go to the brain first?
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Sensory
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Relay
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Motor
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Axial
Q.3.
The messages are transmitted across the gap from one nerve cell to another. Which of the following pairs of words give the name for the gap and how the messages are transferred from one nerve cell to the next?
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Dendrite, chemical
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Dendrite, electrical
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Synapse, chemical
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Synapse, electrical
Q.4.
Which of the following statements about the nervous system and hormones is ?
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When compared to control via the nervous system, hormones act faster but their effects last longer
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When compared to control via the nervous system, hormones act more slowly and their effects last longer
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The effectors of the nervous system are muscles or glands, the effectors for hormones are target cells, tissues and organs
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The response of control by the nervous system is a muscle contraction or hormone secretion, the response to hormones is a chemical change in the body
Q.5.
Which of the following statements about insulin is correct?
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Insulin is secreted by the liver and transported to the pancreas where it changes sugar into starch
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Insulin is a catalyst that destroys glucose in the blood
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Insulin is a hormone that helps to regulate the water content of the blood
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Insulin is secreted by the pancreas and it stimulates cells in the liver to convert glucose into glycogen
Q.6.
What do we call the type of neurone that sends a message from the central nervous system to a gland?
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Sensory
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Relay
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Motor
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Axial
Q.7.
The central nervous system in humans is made up from what?
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Only the spinal cord
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Only the brain
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Both the spinal cord and the brain
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The spinal chord, brain and relay neurones
Q.8.
Why is it important to maintain an even temperature of 37 C for the human body?
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It is a nice temperature to be at
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It is an easy temperature to maintain
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When life first started, that was the temperature of the Earth
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The enzymes in the body work most efficiently at that temperature
Q.9.
What are the missing words in the from this description of a reflex action?A ______ detects a stimulus.A sensory neurone sends impulses to a ______ neurone.A motor _______ sends impulses to an effector.An effector produces a ________.
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sensory, effector, relay, response
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receptor, relay, neurone, response
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finger, motor, sensory, receptor
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receptor, neurone, response, receptor
Q.10.
The main method of controlling the amount of water in the body is via the kidneys. How does this happen?
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A hormone is used to send a message to the kidney to excrete more water
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Nerve impulses from the brain are used to send a message to the kidney to excrete more water
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Both of the above
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No message is needed, it will happen automatically
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