Human A&P Question 1 - 5 Question 1 of 5 When a signaling molecule (e.g., a horm

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Human A&P Question 1 - 5 Question 1 of 5 When a signaling molecule (e.g., a hormone) binds to its receptor, it initiates a series of biochemical reactions that bring about a change in the of the ce which term best describes this series of activity A cellular respiration B. anabolism formation of the h complex D signal transduction pathway E. none of the above Question 2 of 5 which of the following best describes the function (or purpose) of the hypophyseal portal system? A.It transports tropic hormones away from the anterior pituitary, the hypothalamus B. It transports non-tropic from the anterior pituitary to the posterior pituitary C. It manufactures neurohormones and delivers them to the posterior pituitary D.it transports releasing honmones and inhibiting hormones away from the hypothalamus toward the anterior pituitary Question 3 of 5 Which of the following would most directly result from an increase in the secretion of thyroid hormone releasing hormone (also known as TRH or thyrotropin-releasing hormone)? In a woman, the ovaries would secrete more estrogens. In a man, the testes would secrete more testosterone B. The parathyroid gland would secrete more parathyroid hormone. C. The posterior pituitary would secrete more oxytocin. D.The anterior pituitary would secrete more thyroid-stimulating homone. E. The hypothalamus would secrete more thyroid-stimulating hormone. Question 4 of 5 Which of the following hormones causes liver cells to release glucose into the blood? A insulin B. oxytocin C. thyroid hormones (T3/T4) D glucagon E. calcitonin Question 5 of 5 Which of the following is true of mitosis? A. Most body cells undergo mitosis to generate new cells. Mitosis consists of a single division event (i.e., the parent cell divides once) C. Mitosis gives rise to (produces) gametes D. a and b E. a, b, and c

Explanation / Answer

Answer:

1). D. Signalin transduction pathway

An environmental signal, such as a hormone, is first received by interaction with a cellular component, most often a cell-surface receptor. The information that the signal has arrived is then converted into other chemical forms, or transduced. The signal is often amplified before evoking a response. Feedback pathways regulate the entire signaling process.

2). A. It transports trophic hormones away from the anterior pituitary, toward the hypothalamus

The hypophyseal portal system is a system of blood vessels in the brain that connects the hypothalamus with the anterior pituitary. Its main function is the transport and exchange of hormones to allow a fast communication between both glands.

3). D. The anterio pituitary would secrete more thyroid-stimulating hormone

Thyrotropin-releasing hormone is produced by the hypothalamus, that stimulates the release of thyrotropin (thyroid-stimulating hormone or TSH) and prolactinfrom the anterior pituitary. It is a tropic, tripeptidal hormone.

4). D. Glucagon

Glucagon is secreted from the pancreas and stimulates liver to increase glucose concentration by glycogenolysis.

5). D. a and b

Mitosis is the single division. and yields two similar cells.

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