891. Which one of the following vessels exhibits the greatest permeability?
A. continuous type of capillaries
B. lymph capillaries
C. fenestrated capillaries
D. postcapillaryvenules
E. fenestrated sinusoids

892. This cell is associated with osteoid secretion
A. bone lining cell
B. osteoblast
C. osteoclast
D. monocyte
E. fibroblast

893. This cell is responsible for the majority of bone resoprtion/remodeling
A. bone lining cell
B. Osteoblast
C. osteoclast
D. monocyte
E. fibroblast

894. This portion of the hypophysis (pituitary gland) releases no known hormones
A. pars distalis
B. pars intermedia
C. pars nervosa
D. pars tuberalis
E. they all secrete hormones

895. Pituicytes are glial-like cells of the
A. pars distalis
B. pars intermedia
C. pars nervosa
D. pars tuberalis
E. pineal gland

896. Oxytocin is a hormone secreted by cells of the
A. pars distalis
B. pars intermedia
C. pars nervosa
D. pars tuberalis
E. uterus

897. Calcitonin is secreted by these specific cells
A. chromophils
B. interstitial cells (of Leydig)
C. basophils
D. principal cells of the thyroid
E. parafollicular cells of the thyroid

898. Colloid is a substance associated with which of the following endocrine organs?
A. suprarenal (adrenal) glands
B. thyroid gland
C. testis
D. ovary
E. pineal gland

899. Melanin is released by which of the following cells?
A. chief cells of the parathyroid
B. interstitial cells (of Leydig)
C. cells of the zona reticularis of the suprarenal gland
D. pinealocytes
E. parafollicular cells of the thyroid gland

900. High blood calcium levels cause calcitonin release from which of the following cells?
A. chief cells of the parathyroid
B. interstitial cells (of Leydig)
C. cells of the zona reticularis of the suprarenal gland
D. pinealocytes
E. parafollicular cells of the thyroid gland

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