Name two changes your body monitors from the inside.
Core temperature, blood sugar, blood salt, water level, blood pressure,
11 of 31
How many sense organs does a human have?
Five.
12 of 31
Name the two types of effector humans have.
Muscles and glands.
13 of 31
Where are the receptor cells found in the eye?
Retina
14 of 31
Why does the body choose the use a combination of muscular and hormonal effectors?
Muscles are used for fast responses, hormones are used for slower and longer lasting responses.
15 of 31
Name the two organs of the CNS.
Brain and spinal cord.
16 of 31
What is the long part of a nerve called?
Axon
17 of 31
Some axons are insulated enabling faster impulse transport. What is this insulation called?
Fatty sheath
18 of 31
What is the neuron that links a receptor to the processing centre called?
Sensory neuron
19 of 31
What kind of neuron makes a muscle move?
Motor neuron
20 of 31
What is the pathway of nerves in a simple reflex called?
Reflex arc
21 of 31
What is the gap between neurons called?
A synapse
22 of 31
Name three drugs that affect nerve impulse transmission.
Ecstasy (MDMA), alcohol, beta blockers, Prozac
23 of 31
What are the chemicals called that move across synapses?
Transmitters
24 of 31
Describe, step by step, what happens when a nerve impulse reaches a synapse.
1. Impulse arrives at synapse. 2. Chemicals are released from the sensory neuron. 3. It diffuses across the synapse. 4. Receptor molecules receive the chemicals 5. Motor neuron stimulates a nerve impulse and the transmitter chemicals go back.
25 of 31
How wide is a synapse?
20 nanometres wide.
26 of 31
How fast do nerve impulses travel (on average)?
15 metres per second.
27 of 31
What chemical is responsible for pleasure in the brain?
Serotonin.
28 of 31
What is the study of the brain called?
Neuroscience.
29 of 31
Which part of your brain is responsible for your consciousness?
Cerebral cortex
30 of 31
Which part of the brain is responsible for intelligence, memory and memory?
Comments
No comments have yet been made