Question 1

The effect (excitatory or inhibitory) of a neurotransmitter on the postsynaptic neuron depends primarily on the

Accepted Answer

A)  type of receptor on the postsynaptic membrane. 
B)  molecular structure of the neurotransmitter. 
C)  amount of neurotransmitter released. 
D)  permeability of the post-synaptic membrane. 
E)  number of receptors on the postsynaptic membrane. 
A)  type of receptor on the postsynaptic membrane. 
B)  molecular structure of the neurotransmitter. 
C)  amount of neurotransmitter released. 
D)  permeability of the post-synaptic membrane. 
E)  number of receptors on the postsynaptic membrane.

Question 2

An important difference between the sympathetic and the parasympathetic divisions of the autonomic nervous system is that

Accepted Answer

A)  they are connected to different regions of the central nervous system. 
B)  they innervate different organs. 
C)  sympathetic nerves are under voluntary control whereas parasympathetic nerves are involuntary. 
D)  parasympathetic nerves are motor nerves whereas sympathetic nerves are sensory. 
E)  the sympathetic nerves control cardiovascular activity while the parasympathetic nerves control body metabolism. 
A)  they are connected to different regions of the central nervous system. 
B)  they innervate different organs. 
C)  sympathetic nerves are under voluntary control whereas parasympathetic nerves are involuntary. 
D)  parasympathetic nerves are motor nerves whereas sympathetic nerves are sensory. 
E)  the sympathetic nerves control cardiovascular activity while the parasympathetic nerves control body metabolism.

Question 3

In a 'flight or fight' response, the increase in frequency and strength of the heartbeat is controlled by

Accepted Answer

A)  thyroid hormones. 
B)  the hypothalamus. 
C)  the autonomic nervous system. 
D)  the somatic nervous system. 
E)  the sympathetic nervous system. 
A)  thyroid hormones. 
B)  the hypothalamus. 
C)  the autonomic nervous system. 
D)  the somatic nervous system. 
E)  the sympathetic nervous system.

Question 4

After an action potential reaches a synaptic terminal, which of the following events would occur first?

Accepted Answer

A)  Synaptic vesicles fusing with the cell membrane. 
B)  Membrane-bound Na+ channels opening. 
C)  Neurotransmitter binding to membrane-bound receptors. 
D)  Ca2+ entering the synaptic terminal. 
E)  Release of the transmitter into the synaptic cleft. 
A)  Synaptic vesicles fusing with the cell membrane. 
B)  Membrane-bound Na+ channels opening. 
C)  Neurotransmitter binding to membrane-bound receptors. 
D)  Ca2+ entering the synaptic terminal. 
E)  Release of the transmitter into the synaptic cleft.

Exam 29: Nervous Systems

The effect (excitatory or inhibitory) of a neurotransmitter on the postsynaptic neuron depends primarily on the

An important difference between the sympathetic and the parasympathetic divisions of the autonomic nervous system is that

In a 'flight or fight' response, the increase in frequency and strength of the heartbeat is controlled by

After an action potential reaches a synaptic terminal, which of the following events would occur first?

Nature of Molecules

Biomolecules

The Chemistry of Life

Functioning Cells

Movement Across Membranes

Harvesting Energy

Cells, Tissues and Signals

Cell Division

Inheritance

Genes, Chromosomes and Dna

The Genetic Code

Gene Expression

Genomes, Mutation and Cancer

Viruses

Genetic Engineering and Biotechnology

Reproduction, Growth and Development of Flowering Plants

Structure of Plants

Plant Nutrition, Transport and Adaptation to Stress

Plant Hormones and Growth Responses

Animal Reproduction

Animal Development

Homeostasis: Water, Solutes and Excretion

Gas Exchange in Animals

Circulation

Metabolism, Temperature Regulation and Environmental Stress

Animal and Human Nutrition

Innate Defences and the Immune System

Hormonal Control in Animals

Animal Movement

Animal Behaviour

Evolving Life

Evolving Earth

Mechanisms of Evolution

Bacteria

The Protists

Plants

Fungi

Simple Animals: Sponges to Flatworms

Annelids, Molluscs, Nematodes and Arthropods

Echinoderms and Chordates

Australian Biota

Population Ecology

Living in Communities

Ecosystems

Human Impacts

Filters