BIO chapter 7 homework
Which of the following can adversely affect brain development in the fetus?
alcohol
What cells of the nervous system are responsible for anchoring neurons to their blood vessels and controlling the extracellular fluid concentrations of potassium and neurotransmitters?
astrocytes
brachial plexus
axillary, musculocutaneous, median, ulnar, radial nerves serves the thorax and upper appendages
What part of a neuron receives signals and sends a message to the cell body?
dendrites
Which of these parts of the brain is correctly matched with its region?
thalamus; diencephalon
In flaccid paralysis, muscles atrophy because they are not receiving neural stimulation. Damage to which specific part of the spinal cord would cause flaccid paralysis?
ventral root
What produces cerebrospinal fluid (CSF)?
chorocoid plexus
lumbar plexus
femoral and obturator nerves serves the lower abdomen, thighs, and hips
Which of these is an effect of the parasympathetic nervous system?
increases peristalsis within the stomach and small intestines
What part of the brain do we use when initiating skeletal muscle movement?
primary motor area
Sacral plexus
sciatic and gluteal nerves Serves the lower trunk, hip, and lower appendages
phrenic nerve (cervical plexus)
serves the diaphragm, shoulders, and neck
What ion depolarizes the membrane when it diffuses into the axon of a neuron?
sodium