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1. NeuN, GFAP, and Biocytin stained neurons of mouse brain

a) What is the difference in cell morphology of a biocytin-filled neuron with a NeuN labeled neuron?

b) What are the differences in cell densities of astrocytes and neurons?

c) How does the cell densities of astrocytes and neurons change in different areas of the hippocampus?

d) Are there areas in the hippocampus where you can find only neurons or only astrocytes?

e) Is there overlap between neighboring astrocytes?

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Although sea anemones lack definitive brains, they do possess ganglia that serve a similar function to the paired ganglia of flatworms.
2. Some people have low levels of calcium circulating in the blood, a condition known as hypocalcemia. While for many this disorder has little to no effect, for some it can be life-threatening. How could low levels of calcium harm an individual?
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development of a brain within the head of an animal.
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the directionality of the information they send.
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6. A neuron that responds to the environment is a(n):
interneuron.
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motor neuron.
sensory neuron.
7. Which of the following is NOT the role of an interneuron?
stimulating a muscle to contract
conveying information from the internal environment of an animal
relaying information from sensory to motor neurons
maintaining homeostasis
8. Where are postsynaptic cell receptor proteins synthesized?
the Golgi apparatus
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homeostasis.
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All of these choices are correct.
10. What type of cells produce myelin for sensory neurons?
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astrocytes

Nerve cells that conduct messages are called (1) ____. (2) _____ cells, which support and nurture the activities of neurons, make up less than half the volume of the nervous system. (3) _______ neurons respond to specific kinds of environmental stimuli, (4) ______ connect different neurons in the spinal cord and brain, and (5) ______ neurons are linked with muscles or glands. All neurons have a (6) _______ ________ that contains the nucleus and the metabolic means to carry out protein synthesis. (7) _______ are short, slender extensions of the (6), and together these two neuronal parts are the neurons’ “input zone” for receiving (8) _____. The (9) _____ is a single long, cylindrical extension away form the (10) ______; in motor neurons, the (11) ______ has finely branched (12) ________ that terminate on muscle or gland cells and are “output zones,” where messages are sent on to other cells. A neuron at rest establishes unequal electric charges across its plasma membrane, and a(n) (13) ____ ____ is maintained. Another name for (13) is the (14) _____ _____ _____; it represents an ability for the membrane to be disturbed. Weak disturbances of the neuronal membrane might set off only slight changes across a small patch, but strong disturbances can cause a(n) (15) _______ ______, which is an abrupt, short-lived reversal in the polarity of charge across the plasma membrane of the neuron. For a fraction of a second, the cytoplasmic side of a bit of membrane becomes positive with respect to the outside. The (16) ______ that travels along the neural membrane is nothing more than short-lived changes in the membrane potential. A. Neurons H. Sensory B. Motor I. Endings C. Interneurons J. Disturbance D. Cell body K. Signals (stimuli) E. Axon L. Voltage differential F. Dendrites M. Resting membrane potential G. Neuroglial N. Action potential

1) Interpretation of emotion isgoverned by the ___, and expression of emotion is governed by the___.

a. hippocampus, limbic system

b. limbic system, prefrontalcortex

c. hypothalamus,hippocampus

d. prefrontal cortex,amygdala

2) When a neurotransmitter opensa chemically gated ion channel that allows sodium to enter thepostsynaptic cell and depolarize it, the result is an:

A: EPSP

B: IPSP

3)

3) The portion of the nervous system that has voluntary controlover skeletal muscles is the ____ division.

a. autonomic motor

b. somatic sensory

c. somatic motor

d. visceral sensory

4) The cranial nerve responsible for movement ofthe medial rectus, superior rectus, inferior rectus, and inferioroblique muscles is the __________ nerve.

a. oculomotor

b. trochlear

c. abducens

d. trigeminal

5) The superior colliculi helpyou respond to:

a. somatic stimuli, for example,when you swat at a bug that has landed on your arm

b. visual stimuli, for example,when you turn toward a bright flash of light

c. internal stimuli from yourviscera, for example, when you feel abdominal pain

d. auditory stimuli, for example,when you turn toward a loud bang

6) Glial cells differ from neurons in thatthey:

a. transmit nerve impulses muchmore slowly

b. are found only in thePNS

c. are smaller and capable of mitosis

d. are larger and capable of mitosis

7) Association areas:

a. correlate similar functions from the same lobes on theopposite side of the brain

b. integrate new sensory inputs with memories of pastexperiences

c. correlate similar functions from different lobes on the sameside of the brain

d. correlate information from opposite sides of the brain

8) This is the site of protein synthesis in a neuron

a. Mitochondria

b. Nucleus

c. Nissl body

d. Golgi body

please please help me....... T_T

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