In plant’s cell, their DNA can be found mainly in the
nucleus, mitochondria and chloroplasts as this is where their DNA is being made
and being restored. It is important among plants like any other living
creatures because it is a genetic material presenting them and carries
information that will make them function and form their structure.
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Physical exercise preserves bone mass. Measurements of bone biomarkers may reflect the events in bone during exercise. Fifteen healthy, well-trained individuals (7 men and 8 women) performed a running test for 21 min until exhaustion. Venous blood samples were drawn before and 30 min after the exercise to measure the levels of osteocalcin, the carboxyterminal propeptide of type I procollagen (PICP) and the carboxyterminal cross-linked telopeptide of type I collagen (ICTP). After exercise, the women had a marked increase in serum osteocalcin concentrations (from 7.5±5.0 μg/1 to 11.5±3.0 μg/1), whereas the level was unaffected in the men (from 14.5±3.0 μg/1 to 13.5±4.6 μg/l). In the men there was a marked increase in PICP (from 240±47 μg/1 to 268±56 μg/1) that was not seen in the women (from 244±70 μg/1 to 253±60 μg/1). In neither group did ICTP levels change. In conclusion, significant responses were seen in PICP and osteocalcin during exercise, indicating that such measurements may be valuable for the further delineation of the effects of physical activity on bone. Furthermore, the different responses in men and women point to interesting areas for future studies.
Answer:
The correct answer is option C. up-regulation.
Explanation:
When the body requires the increased level of the hormone, target cells increase the synthesis of more receptors on the cell surface of the target organ. This process is known as the up-regulation of the receptors for the hormone.
Up-regulation is an increase in the receptors present on the cell surface of target cells so that cells can easily bind to the hormone. Up-regulation makes the cells increase the sensitivity to a hormone.
Thus, the correct answer is option C up-regulation.
Answer: <u>Student 3</u>
Explanation:
Mammals are a type of animal which are classified through several factors.
- these vertebrates posses
- hair or fur
- three bones in the middle ear
- a brain region for higher-order brain function, the neocortex
- nurse their young with milk from mammary glands
Whales are fully aquatic mammals, with specialized adaptations to thrive in their environment. These adaptations, like blubber, allow these mammals to maintain their body temperatures in cold environments. They are part of the order that includes their closest relatives as even-toed, hoofed land dwelling mammals called Cetartiodactyla, as a suborder, Cetaceans. Balaenoptera is a genus of whales with around eight distinct species, including the fin whale and minke whale.