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WorksheetsHomeostasis 1.0
Total questions: 20
Worksheet time: 13mins
The maintenance of a constant internal state within an organism is termed:
coordination.
regulatory control.
homeostasis.
optimal level.
Which of these is an example of a positive feedback mechanism?
When you are hot, your body sweats to cool you down. This means your temperature went above normal and your body sweats to counteract that change to bring you back to normal. What kind of feedback loop would this be?
Negative Feedback Loop
Positive Feedback Loop
Neutral Feedback Loop
Opposite Feedback Loop
Conduction of a nerve impulse is:
faster than that of a hormone and lasts for a longer period.
faster in axons with a small diamter.
faster in myelinated neurones.
faster in longer axons.
The junction between neurons is termed a:
synaptic knob.
synaptic cleft.
synapse.
neurotransmitter.
Which of the following is a correct representation of the stimulus-response model?
stimulus - receptor - coordinating system - effector - response
stimulus - coordinating system - receptor - effector - response
stimulus - coordinating system - receptor - response
stimulus - coordinating system - effector - response
The neuron at rest:
is negatively charged on the outside relative to its cytoplasm.
has a difference in charge across the membrane due to active transport of Na+ out of the cytoplasm.
has the same electrical charge on both sides of the cell membrane.
has a difference in charge across the membrane due to active transport of Na+ into the cytoplasm.
The pancreas in this diagram could be seen as what:
effector
receptor
coordinating system
response
stimulus
What is the cell structure labelled as 1?
Dendrite
Cell Body
Axon
Myelin sheath
What structure of the neuron is labelled as 2?
Dendrite
Cell body
Axon
Synaptic cleft
The non-nervous cells that cover the axons are called:
Neurons
Schwann Cells
Node of Ranvier
Cell Insulator
Sensory (afferent) neurons are those that:
Receive a stimuli and carry information from a receptor to the CNS
Transmit information from the central nervous system to an effector organ to bring about a response
Relay information between sensory input and motor output
Act as a link between neurons
The neuron displayed is a:
Interneuron
Sensory Neuron
Motor Neuron
Association Neuron
What section of the action potential is represented by the area labelled 1?
Resting Potential
Hyperpolarisation
Depolarisation
Repolarisation
What part of the action potential is occurring at label 3?
Resting potential
Hyperpolarisation
Repolarisation
Depolarisation
Neurotransmitters are released by the pre-synaptic neuron and travel across what to the post-synaptic neuron?
Synaptic cleft
Axonic end of a neuron
Synaptic knob
Junction
At resting potential, the cytoplasm of a cell is:
-55mV
+40mV
+50mV
-70mV
What is/are the receptor/s in this stimulus-response model?
muscles
hypothalamus
blood vessels
sweat glands
What is the response to an increase in blood pressure?
An increase in heart rate
Decreased nerve activity
A decrease in heart rate
A decrease in blood pressure
