Answer the following statements true (T) or false (F)
1. The tonsils are part of the lymphatic system.
2. Lymph contains both tissue fluid and red blood cells.
3. The thoracic duct helps return lymph to the blood.
4. The lymphatic system is important in the functioning of the immune system.
5. The tiny, thin-walled sacs in the lung are called bronchioles.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
5. FALSE
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Donna was rushing to class and slipped on a patch of ice and fell backward. An X ray revealed a broken coccyx. All the associated muscles were bruised. Name these muscles.
What will be an ideal response?
Select the correct statement about the summation of simple twitches
a. They can occur because of the long duration of the action potential in a muscle fiber. b. They reduce the tension in a muscle. c. They result from the slow stimulation of a muscle fiber. d. The effect is unrelated to the refractory periods of action potentials. e. The twitches resulting from separate action potentials.
Which features are found only on thoracic vertebrae?
A. Costal facets and demifacets B. Laminae C. Spinous processes D. Transverse foramina E. Vertebral foramina
Which of the following cell types is diploid?
A. spermatid B. mature sperm C. primary spermatocyte D. secondary spermatocyte E. spermatozoa