Mod 7 Flashcards
Chemical Messengers produced by endocrine glands are called
neurotransmitters
The longest part of a neuron is most likely to be the
axon
The function of dendrites is to
Receive incoming signals from other neurons
What is the correct sequence in the transmission of a neural impulse
dendrite, cell body, axon, synapse
With regard to the process of neural transmission, a refractory period refers to a time interval in which
a neuron recharges before it can fire again
A brief electrical charge that travels down the axon of a neuron is called the
action potential
A synapse is a
junction between a sending and receiving neuron
Increasing the intensity if a stimulus above the threshold will not similarly increase the intensity if a neural response to that stimulus. This highlights the nature of the
all or none response
Information is carried from the central nervous system to the tissues by
motor neurons
Schizophrenia is most clearly linked with excess activity at receptor sites for the neurotransmitter ________ .
dopamine
The chemical messengers released into the special junctions between neurons are called
neurotransmitters
Transferring messages from a motor neuron to a leg muscle requires the neurotransmitter known as
acetylcholine
You are able to pull your hand away from hot water before pain is felt becuase
Movement of the hand is a reflex that involves intervention of the spinal cord only
The somatic nervous system is a component of the ______ nervous system.
peripheral
The centeral nervous system consists of
the brain and the spinal cord
The 2 major divisions of the nervous system are the centeral and the _____ nervous systems
Peripheral
You come home one night to find a burglar in your house. Your heart starts to racing and you begin to perspire. These physical reactions are triggered by the:
sympathetic nervous system
Because of its function in directing other glands, the pituitary gland is sometimes called the
master gland
The thyroid gland helps to
regulate energy level
Physical changes during puberty, like secreting sex hormones, are most directly affected by which of the following glands? A) adrenals and thyroids B)ovaries and testes C)adrenal and hypothalamus D) thyroid and pituitary
B
