Answer the following questions true (T) or false (F)
1. You reached into the freezer to grab a piece of cold ice. This temperature information is carried to the brain by the posterior columns of white matter in the spinal cord.
2. The corticospinal tracts are descending (motor) tracts located in the spinal cord.
3. The two major ascending tracts in the spinal cord carry somatic sensory stimuli to the third-order neurons in the thalamus of the brain.
1. FALSE
2. TRUE
3. TRUE
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Parasympathetic functions include ________
A) allowing the body to cope with an external threat B) raising blood glucose levels C) lens accommodation for close vision D) a stimulation of heart rate and force of contraction
From the lower esophagus to the distal colon, the outermost tissue layer of the digestive tract is the __________.
Fill in the blank(s) with the appropriate word(s).
Which organ is NOT found in the thoracic cavity?
A) heart B) primary bronchi C) lung D) liver
Select the characteristics of slow-twitch muscle fibers. Check all that apply.
A. Few capillaries are present. B. These fibers are also known as white fibers. C. Myoglobin is present in high concentration D. Mitochondria are numerous in these fibers.