单项选择题

A．It is secreted by the choroids plexusB．It bathes and ……

Whih of the following statements regarding the cerebrospinal fluid is FALSE

A．It is secreted by the choroids plexus
B．It bathes and nourishes the brain and spinal cord
C．It is composed mostly of protein with little sodium and potassium
D．It is resorbed by arachnoid villi
E．Blockage of its pathway leads to hydrocephalus

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热门试题

单项选择题Adrenocorticotropic hormone (ACTH) is produced by which of the following cells

A．Chromophobes in the pars distalis
B．Neurosecretory cells in the median eminence
C．Acidophils in the pars distalis
D．Neurons of the paraventricular nucleus in the hypothalamus
E．None of the above

单项选择题Which of the following are present in elastic arteries but are NOT seen in muscular arteries

A．Elastic fibers
B．Factor Ⅷ
C．Fenestrated membranes
D．External elastic lamina
E． Basement membrane

单项选择题Of the following cell types found in connective tissue, which is most often present along capillaries and resembles fibroblasts

A．Plasma cell
B．Lymphocyte
C．Macrophage
D．Pericyte
E．Mast cells

单项选择题Which one of the following statements about stratified squamous epithelium is FALSE

A．The surface layer of cells may be keratinized
B．The cells in its most superficial layer are cuboidal
C．It is supported by a basal lamina
D．Its cells possess desmosomes
E．Stratified squamous epithelium is characterized by flattened cells in its superficial layer.

单项选择题Which of the following statements is NOT the process of the tissue preparation

A．Fixation
B．Dehydration
C．Embedment
D．Cover slip
E．Microscope