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