Chemistry for Biologists

Nerves and hormones

1. Stimulation of the presynaptic membrane causes a change in its electrical
calcium ions to flow in
calcium ions to flow out
sodium ions to flow in
sodium ions to flow out
2. The neurotransmitter is broken down by a chemical process called:
precipitation
reduction
hydrolysis
oxidation
3. Nicotine mimics the action of:
cytoplasm
neurotransmitters
other chemicals
other hydrocarbons
4. The over stimulation of nervous tissue by nicotine:
helps to repair nerve cells
causes nerve damage
promotes growth
protects the body from serious illness
5. Both the nervous and endocrine systems:
use chemicals to help the body grow
use water to make them visible
are water soluble
use chemicals to transmit messages
6. Nerve cells are also known as:
nucleus
neurones
cytoplasm
impulses
7. The axon is:
an extension of the cell cytoplasm
very long dendrons
a hollow tube
just the cell membrane
8. When the cell membrane is depolarised its permeability:
alters to allow chlorine ions in
only allows water molecules out
stays the same
alters to allow to let sodium ions in
9. Ion transfer reactions:
only happens in lower life forms
only happens at the ends of the neurone
are a wave of reactions that move alone the length of the axon
only happen where the nerve is stimulated
10. The neurotransmitter found in synaptic vesicles is called:
acetylchlorine
acetylcholine
acetic acid
acetylene

 

RSC