Mammalian Anatomy HW#--More Neuronal

1. Which of the following types of neurons serves as motor neurons for voluntary and involuntary

Multipolar neurons

**motor neurons are neurons that control motor movements of the body. It takes commands from the cortex and sends the signal to the spinal cord, or to the spinal cord to the muscles. These neurons are also called multlipolar neurons due to its one long axon and their short dendrites extending from the cell body.

2. Complete the following statement. The posterior horn of the gray matter of the spinal cord _______.

Contains axons of sensory neurons and cell bodies of interneurons

**The posterior grey column (posterior cornu, dorsal horn, spinal dorsal horn posterior horn) of the spinal cord is one of the three grey columns of the spinal cord. It receives several types of sensory information from the body, including fine touch, proprioception, and vibration.

3. The brain and spinal cord are covered by connective tissue membranes called __________.

Meninges
**Meninges -- protective covering of the brain and spinal cord; comprised of three layers from outer most to deepest dura mater, arachnoid mater, pia mater.

4. Neuron processes that receive impulse from other neurons are called __________.

Dendrites

**Neurons have three key parts: the dendrites, which receive signals, the cell body, which contains the nucleus, and the axon, which sends signals. The axon is coated in a fatty substance called myelin, which is secreted by cells called oligodendricytes or Schwann cells

5. Which of the following statements is correct?

The gray matter of the cerebrum consists of neuron cell bodies, dendrites, unmyelinated axons and neuroglia. Myelinated axons and neuroglia appear white and are insulated.