Voluntary Circulatory Essay

Quiz 1

Although we haven't covered these systems in detail yet, which of the following systems would involve gas exchange of CO2 and O2?

I only chose respiratory as an answer. However, the correct answers are respiratory and cardiovascular because of the pulmonary circulatory system. Gas exchange occurs at pulmonary capillary beds.

Why does O2 say, "...if Glucose can't get in, how can I do my job?"

I should read the article more carefully. I answered O2 has nothing to do with cellular respiration and it is wrong. According to the article, page 5, O2 said cellular respiration requires both myself (O2) and glucose by facilitated diffusion. The correct answer is oxygen and glucose work together to produce ATP. ATP molecules are yield during cellular respiration.

Quiz 3

Finish the following sentence using the answer choices. A chimera is....

I

chose usually a hermaphrodite, a mythical creature, a person with 2 sets of DNA. But all the choices are the answers. The result of two fertilized eggs, fuzed together is also the answer because according to its definition, chimeras are formed two fertilized eggs or early embryos fused together.
In the formation of a "normal" zygote, the gametes from mom and the gametes from dad each contribute __________ autosomes to the zygote. This is a number! This is NOT a trick, but you MUST read carefully!
The correct answer is 23 because human zygote usually has a total of 46 chromosomes, and both mom and dad contribute equally. (50:50, 23 each)
Quiz 4
The kidneys will increase the deposition of calcium in the bone because of the release of calcitonin by the __________________ cells in the thyroid gland
The correct answer is parafollicular and I answered follicular.

I should remember the lecture note that parafollicular cells of the thyroid gland produce calcitonin.

Which of the following is/are not considered a "con" of hormone replacement therapy (HRT)?

The correct answer is bone fractures because HRT slows bone turnover and increase bone mineral density which are good for reducing bone fracture.

Osteoporosis may be described in many ways. Which of the following accurately characterizes osteoporosis? More than one may apply.

I should not include estrogen increase osteoblast apoptosis and thereby decreases the onset of osteoporosis. Estrogen promote osteoblast by limiting apoptotic cell death which leads decrease bone fragility and fractures. Estrogen can promote osteoblast viability by increasing osteoblast resistance to apoptosis.

Quiz 5

Trenbolone is a steroid that mimics testosterone. Please select all of the possible effects of testosterone. More than one may

apply.
I missed this question by not including inhibits GnRH when at high levels. According to our lecture, testosterone functions like other steroid hormones. To be more specific, increasing testosterone is a negative feedback which regulate gonadotrophin-releasing hormone.