Malignant melanoma is a particularly dangerous form of skin cancer because ________
A) it may become aggressive, rapidly spread via the lymphatic system, and have a high mortality rate
B) this type of cancer is most commonly localized to specific areas of the skin and rarely metastasizes
C) exposure to UV rays from the sun cause the DNA in cells of the stratum basale to mutate
D) slowly dividing melanocytes readily enter the lymphatic system
A
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The lungs deliver a regular supply of oxygen to the blood, which is in turn circulated to most all the cells of the body. At the same time oxygen is consumed during aerobic cellular respiration within these cells. This implies that ________
A) oxygen will passively diffuse into the cells B) oxygen requires active transport to enter most cells C) the concentration gradient for oxygen is steepness inside of the cell D) the rate of oxygen diffusion is independent of concentration
The glucocorticoids
A. stimulate glycogenolysis. B. increase the inflammatory response. C. supplement the sex hormones from the gonads. D. decrease synthesis of glycogen. E. stimulate gluconeogenesis.
What are gametes?
A. Sex hormones such as testosterone and estrogen B. Reproductive organs such as testes and ovaries C. Sex cells such as sperm and ova D. Fertilized eggs that develop into embryos
What anatomical features allow for the expansion of the urinary bladder as it fills with urine?
A. Rugae and transitional epithelium B. Rugae and columnar epithelium C. Plicae and elastic connective tissue D. Plicae and stratified squamous epithelium