Prelab-8 (Spinal Cord&Reflex Physiology)

There are ________ enlargements of the spinal cord. A. 1 B. 2 C. 3 D. 4

B. 2

How many pairs of spinal nerves are present in humans? A. 28 B. 31 C. 29 D. 24

B. 31

What is the first event associated with a reflex? A. The integrating center receives information and makes decisions based upon the information. B. The receptor detects a stimulus. C. The effector produces a response. D. The integrating center elicits a response.

B. The receptor detects a stimulus.

The meninges that cover the spinal cord from outermost to innermost are ________. A. arachnoid mater, dura mater, pia mater B. dura mater, arachnoid mater, pia mater C. dura mater, pia mater, arachnoid mater D. pia mater, arachnoid mater, dura mater

B. dura mater, arachnoid mater, pia mater

The spinal nerves are ________ nerves. A. sensory B. mixed C. motor

B. mixed

The patellar or knee-jerk reflex involves ________. A. stimulatory nerve impulses to both quadriceps and the hamstrings B. stimulatory nerve impulses to the quadriceps and inhibitory impulses to the hamstrings C. inhibitory nerve impulses to both quadriceps and the hamstrings D. stimulatory nerve impulses to the hamstrings and inhibitory impulses to the quadriceps

B. stimulatory nerve impulses to the quadriceps and inhibitory impulses to the hamstrings

This extension of one of the meninges covering the spinal cord attaches it to the coccyx. A. dura mater B. conus medullaris C. filum terminale D. denticulate ligament

C. filum terminale

In nervous system physiology, the definition of a reflex is a ________. A. well thought out, therefore slow, response to an emergency situation B. voluntary response, which can be withheld C. rapid, predictable, involuntary motor response to a stimulus D. variable response to a startling stimulus

C. rapid, predictable, involuntary motor response to a stimulus

At the level of the first or second lumbar vertebra the spinal cord terminates in a structure called the ________. A. denticulate ligament B. dura mater C. filum terminale D. conus medullaris

D. conus medullaris

Name the receptor for the stretch reflex. A. tendon organ B. temperature receptors C. pain receptors D. muscle spindle (indicates stretch on the muscle)

D. muscle spindle (indicates stretch on the muscle)