NAS 2 Exam (2023/2024 Update) | 100% Correct| More than 100 Questions and Verified Answers
QUESTION
Name five factors that affect body metabolic
... [Show More] rate.
Answer:
Increased exercise, increased thyroid hormones, increased sympathetic ANS stimulation, increased body temperature (fever), Food consumption.
QUESTION
Thermoregulation is maintained with a negative feedback loop. Where does this loop begin?
Answer:
Thermoreceptors throughout the body.
QUESTION
Describe the role of the anterior neuron group.
Answer:
controls heat balance
QUESTION
Describe the role of the preoptic neurons
Answer:
integrate signals that come from thermoreceptors
QUESTION
Describe the role of heat regulating centers
Answer:
control heat loss and heat production
QUESTION
What is the preoptic center response to overheating
Answer:
Inhibits the heat-promoting center and stimulates the heat losing center
QUESTION
Describe blood vessel response to stimulation from the heat-losing center.
Answer:
Blood vessels dilate allowing greater amounts of warmed blood into the skin.
QUESTION
How does sweat result in something of a cooling radiator effect somewhat to a car system?
Answer:
The evaporating sweat cools the skin, which cools the blood, that is re-circulated in the body.
QUESTION
What is the preoptic center response to overcooling?
Answer:
Stimulates the heat-promoting center and inhibits the heat losing center.
QUESTION
Describe the muscular response to stimulation from the heat-promoting center.
Answer:
muscles constrict and shiver which produces additional heat.
QUESTION
Describe blood vessel response to stimulation from the heat-promoting center.
Answer:
They contract decreasing the flow of warm blood at the body's periphery.
QUESTION
Define the cells' role in the body
Answer:
they are the basic living, structural, and functional unit of the body that support homeostasis and contribute to functional capabilities of the human organism.
QUESTION
describe the function of ciliated and flagellated cells in the body.
Answer:
The flagellum functions to move the entire cell; cilia function to move fluid along the cells surface
QUESTION
Describe microvilli function.
Answer:
These structures increase surface area for absorption. Especially in the small intestine and proximal convoluted tubules of the kidneys. [Show Less]