Which of the following statements regarding blood capillaries and lymphatic capillaries is not true?
A. Endothelial cells of both blood and lymphatic capillaries are joined by tight junctions.
B. Bacteria and lymphocytes may move into lymphatic capillaries through gaps between cells.
C. Lymphatic capillaries are closed at one end, unlike blood capillaries.
D. Both lymphatic and blood capillaries are lined with endothelium.
E. Both lymphatic and blood capillaries reabsorb fluid from tissue spaces.
A. Endothelial cells of both blood and lymphatic capillaries are joined by tight junctions.
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Diseases may arise when proteins fail to fold correctly in their last stages of processing and/or are directed towards the lysosome rather than towards the cell membrane. Cystic fibrosis is an example of this type of disease. In cystic fibrosis, a functional ion channel is sent to the lysosome for destruction rather than being sent to the plasma membrane. Given this observation, the cellular component that is most likely the cause of the disease is the ________.
A)Peroxisomes B)Golgi apparatus C)Ribosomes D)Lysosomes
What is the typical magnification provided by the eyepiece (ocular) lens system?
A. 1,000x B. 4x C. 100x D. 10x E. 0x (the eyepiece lens system does not provide any magnification)
Which describe the epidermis? Choose all that apply.
A. It is avascular. B. It is made of simple squamous epithelium. C. It is richly vascularized. D. It is made of stratified squamous epithelium.
Answer the following statements true (T) or false (F)
1. An abnormal mass of proliferating cells is called a neoplasm. 2. A neoplasm can either be malignant or benign. 3. A flat, scalelike epithelial cell would be called squamous. 4. Stratified squamous epithelial tissue is composed of a single layer of flat, scalelike cells. 5. Glia cells are an example of connective tissue.