The pampiniform plexus:
a. supplies innervation to the scrotum
b. is a network of tubes between the testis and epididymis
c. is a vascular structure that helps cool the testes
d. allows water to be reclaimed from urine in the bladder
Answer: c. is a vascular structure that helps cool the testes
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Phenylketonuria (PKU) is a genetic disease caused by mutation of the PAH gene, which normally produces the enzyme phenylalanine hydroxase. This enzyme is essential for the conversion of the amino acid phenylalanine into tyrosine. Without the enzyme, phenylalanine builds up in the blood and tissues of various body regions. It can produce severe skin discolorations and foul odor, but also intellectual disabilities and behavioral problems. Some people may experience only one type of PKU symptoms and not the others. PKU is an example of
A. incomplete penetrance. B. pleiotropy. C. genetic heterogeneity. D. complete penetrance.
Which of the following vitamins is needed to promote healthy muscular growth?
A. Vitamin B1 B. Vitamin B2 C. Vitamin B12 D. Vitamin D3
Which of the following occur due to changes in the cells, extracellular materials, and tissues in older adults? (Check all that apply.)
A. Increase of muscle cells B. Increase of neurons C. Loss of elasticity of connective tissue D. Increase in collagen fibers E. Loss of flexibility of connective tissue
The central sulcus of each cerebral hemisphere separates the ________
A) frontal and parietal lobes B) parietal and occipital lobes C) parietal and temporal lobes D) temporal and occipital lobes