When an individual is existing in a normal calm environment, the __________________ will be operating at a relatively high level of activity:

6. When an individual is existing in a normal calm environment, the

__________________ will be operating at a relatively high level of activity:

only stress, fear and anxiety stimulate the __________________.

a. Sympathetic nervous system: Somatosensory ns

b. Sympathetic nervous system: Parasympathetic ns

c. Reticular nervous system: Parasympathetic ns

d. Parasympathetic nervous system: Sympathetic ns

7. Which of the following statements is true?

a. Motor afferent neurons possess long dendrites and short axons.

b. Sensory afferent neurons possess long dendrites and short axons.

c. Motor efferent neurons possess long dendrites and short axons.

d. Sensory efferent neurons possess long dendrites and short axons.

8. The Resting Membrane Potential (RMP) of excitable cells is generally measured (from the intracellular compartment) at a value of closest to:

a. -40mV

b. +20mV

c. 0mV

d. -80mv

9. The voltage at which voltage-gated sodium-channels open is called:

A. The graded potential

B. The refractory period

C. Threshold

D. Anomylous rectification

10. Depolarization is caused by a rapid inward:

a. Sodium current

b. Potassium current

c. Chloride current

d. Hydrogen current

11. Repolarization is caused by a rapid outward:

a. Sodium current

b. Potassium current

c. Chloride current

d. Hydrogen current

12. The somas of sensory neurons are located in the:

a. Ventral root of the spinal nerves

b. Gray matter of the spinal cord

c. White matter of the spinal cord

d. Dorsal root ganglion of the spinal cord

13. The somas of motor neurons are located within the:

a. Ventral root of the spinal nerves

b. Gray matter of the spinal cord

c. White matter of the spinal cord

d. Dorsal root ganglion of the spinal cord

14. The interneurons involved in the spinal reflex arc are located within:

a. Ventral root of the spinal nerves

b. Gray matter of the spinal cord

c. White matter of the spinal cord

d. Dorsal root ganglion of the spinaL CORD