Biol 2108 Chapters 34-36 Achieve & iClicker| Question plus
Answers | New Review
Chemoreceptor is to taste as mechanoreceptor is to ** Answ** sound,
mechanoreceptors detect pressure (touch, sound), thermal receptors detect
temperature, chemoreceptors detect smell
What impairment would you expect from a hippocampal deficit? ** Answ** an
inability to establish memories that could later be retrieved
What cells produce myelin for sensory neurons? ** Answ** Glial cells
The basic contractile unit of a muscle is called the ** Answ** sarcomere
The power stroke describes ** Answ** the pivoting of the myosin head which causes
actin and myosin to slide relative to each other
Which statement is true regarding the axial skeleton (skull, spinal cord) ** Answ** It
is thought to have evolved before the appendicular skeleton (arms and legs)
Muscle fibers generate maximum force ** Answ** at intermediate lengths
In vertebrates, the speed of transmission along a neuron can be increased by **
Answ** myelinating the axon
In vertebrates, the nervous system directly interacts with the _______ to control
endocrine function in the body ** Answ** hypothalamus, the hypothalamus's function
is to connect the nervous system to the endocrine system
T/F Sea sponges lack a nervous system ** Answ** True
Which part of a neuron is associated with receiving information? ** Answ** the
dendrites
Which structure is/are the light-absorbing compound(s) used by photoreceptors? **
Answ** retinal
The development origin of the cerebellum is the ** Answ** hindbrain
Which is not a role of the interneuron? ** Answ** stimulating a muscle to contract
Why does an action potential travel in one direction down an axon ** Answ**
because voltage-gated sodium ion channels cannot immediately reopen
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, Afferent and efferent neurons differ in ** Answ** the directionality of the information
they send, afferent neurons send signals to the central nervous system (brain and the
spinal cord) and efferent neurons send signals to an area outside the central nervous
system
Which would expect a squid not to have in its nervous system? ** Answ** nerve net,
non cephalized organization
What type of cells produce myelin for sensory neurons? ** Answ** Schwann cells
myelinate sensory neurons, oligodendrocytes produce myelin for nerves in the brain
The resting membrane potential of a neuron is determined by ** Answ** movement
of potassium ions relative to other ions, sodium potassium pump maintain resting
potential, 3 sodium out 2 potassium in
During synaptic transmission (movement of neural transmitters along the synap) **
Answ** receptors that bind neurotransmitters trigger a change in postsynaptic
membrane potential
*voltage gated channels open in presynaptic membrane
*neurotransmitters bind to receptors on outside of pre synaptic membrane, not
absorbed by anything
*
Voltage gated Na channels close ** Answ** loss of positive charge at the climax,
potassium repolarizes the cell, sodium channels close and potassium channels open
Inhibitory synapses are important for ** Answ** filtering out unimportant information,
repolarize neurons, preventing action potentials from firing
Multiple sensory receptors can synapse on a single neuron. The receiving neuron has a
firing rate proportional to the number of signals received. Of which of the following is this
an example? ** Answ** spatial summation has multiple sensory receptors, temporal
is frequency and how many times
Which region of the brain is larger in humans and primates than in other vertebrates?
** Answ** the cerebrum of the forebrain is larger in humans and primates
Myosin from a rabbit will bind to actin from an amoeba. What does this suggest about
the evolution of the structures of actin and myosin? ** Answ** the binding sites of
actin and myosin are strongly related, actin and myosin are both proteins, all proteins
are coded by genes which are subject to evolution via mutation and genetic differences
Which type of muscle cells are active in ** Answ** smooth muscle cells, cardiac
muscle cells are only associated with the heart and contract themselves which makes
them less useful is vasoconstriction, smooth muscles must be told to contract
For assistance with assignments contact
Answers | New Review
Chemoreceptor is to taste as mechanoreceptor is to ** Answ** sound,
mechanoreceptors detect pressure (touch, sound), thermal receptors detect
temperature, chemoreceptors detect smell
What impairment would you expect from a hippocampal deficit? ** Answ** an
inability to establish memories that could later be retrieved
What cells produce myelin for sensory neurons? ** Answ** Glial cells
The basic contractile unit of a muscle is called the ** Answ** sarcomere
The power stroke describes ** Answ** the pivoting of the myosin head which causes
actin and myosin to slide relative to each other
Which statement is true regarding the axial skeleton (skull, spinal cord) ** Answ** It
is thought to have evolved before the appendicular skeleton (arms and legs)
Muscle fibers generate maximum force ** Answ** at intermediate lengths
In vertebrates, the speed of transmission along a neuron can be increased by **
Answ** myelinating the axon
In vertebrates, the nervous system directly interacts with the _______ to control
endocrine function in the body ** Answ** hypothalamus, the hypothalamus's function
is to connect the nervous system to the endocrine system
T/F Sea sponges lack a nervous system ** Answ** True
Which part of a neuron is associated with receiving information? ** Answ** the
dendrites
Which structure is/are the light-absorbing compound(s) used by photoreceptors? **
Answ** retinal
The development origin of the cerebellum is the ** Answ** hindbrain
Which is not a role of the interneuron? ** Answ** stimulating a muscle to contract
Why does an action potential travel in one direction down an axon ** Answ**
because voltage-gated sodium ion channels cannot immediately reopen
For assistance with assignments contact
, Afferent and efferent neurons differ in ** Answ** the directionality of the information
they send, afferent neurons send signals to the central nervous system (brain and the
spinal cord) and efferent neurons send signals to an area outside the central nervous
system
Which would expect a squid not to have in its nervous system? ** Answ** nerve net,
non cephalized organization
What type of cells produce myelin for sensory neurons? ** Answ** Schwann cells
myelinate sensory neurons, oligodendrocytes produce myelin for nerves in the brain
The resting membrane potential of a neuron is determined by ** Answ** movement
of potassium ions relative to other ions, sodium potassium pump maintain resting
potential, 3 sodium out 2 potassium in
During synaptic transmission (movement of neural transmitters along the synap) **
Answ** receptors that bind neurotransmitters trigger a change in postsynaptic
membrane potential
*voltage gated channels open in presynaptic membrane
*neurotransmitters bind to receptors on outside of pre synaptic membrane, not
absorbed by anything
*
Voltage gated Na channels close ** Answ** loss of positive charge at the climax,
potassium repolarizes the cell, sodium channels close and potassium channels open
Inhibitory synapses are important for ** Answ** filtering out unimportant information,
repolarize neurons, preventing action potentials from firing
Multiple sensory receptors can synapse on a single neuron. The receiving neuron has a
firing rate proportional to the number of signals received. Of which of the following is this
an example? ** Answ** spatial summation has multiple sensory receptors, temporal
is frequency and how many times
Which region of the brain is larger in humans and primates than in other vertebrates?
** Answ** the cerebrum of the forebrain is larger in humans and primates
Myosin from a rabbit will bind to actin from an amoeba. What does this suggest about
the evolution of the structures of actin and myosin? ** Answ** the binding sites of
actin and myosin are strongly related, actin and myosin are both proteins, all proteins
are coded by genes which are subject to evolution via mutation and genetic differences
Which type of muscle cells are active in ** Answ** smooth muscle cells, cardiac
muscle cells are only associated with the heart and contract themselves which makes
them less useful is vasoconstriction, smooth muscles must be told to contract
For assistance with assignments contact
