A dendrite of a sensory neuron is classified as a(n) ____
a. free nerve ending
b. encapsulated receptor
c. sensory receptor
d. sensory stimulus
e. tertiary sensory neuron
ANSWER: a
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Which of the following statements about the proximal convoluted tubule of the mammalian kidney is false?
A. It is impermeable to water. B. It has thick walls with microvilli. C. It is the first section of the renal tubule that filtrate encounters after passing into Bowman's space. D. It reabsorbs glucose and amino acids filtered by the glomerulus. E. The epithelial cells of the proximal convoluted tubule have abundant mitochondria to supply the energy for active reabsorption of solutes.
You are genetic counselor, and a couple comes to you with concerns that if they have a child together, he or she could
have sickle-cell anemia. Genetic tests reveal that both the man and woman are carriers for sickle-cell anemia. How should you advise them?
a. Half of their children will have sickle-cell anemia, and the other half will be carriers. b. All of their children will have sickle-cell anemia. c. There are no concerns, because none of their offspring have a chance of inheriting the sickle-cell allele. d. While none of their children will have sickle-cell anemia, each child will have a 50% chance of being a carrier. e. All of their children will have a 25% chance of having sickle-cell anemia.
Studies have shown that a woman's life expectancy is diminished due to menstruation
Indicate whether the statement is true or false
The human life cycle involves
a. mitosis b. meiosis c. both d. neither