Answer:
The parathyroid glands secretes PTH hormone that controls the blood calcium level.
Explanation:
The PTH is the parathyroid hormone which is secreted by parathyroid gland. It maintains the blood calcium level whenever required in the body.
The hormone increases the amount of calcium by preventing calcium excretion from the urine. The PTH also stimulates the release of calcitriol. The calcitriol allows absorption of calcium from the diet.
Use the chem reference table to figure it out
Table R states that an alkene (double bonded carbon) has a general formula of Cn H2n so look for any formula that has 2x the number of hydrogens then carbon
This is an example of a physiological mechanism. A physiological mechanism is <u>an automatic mechanism that governs our body using our bodily organs to stay alive and functioning</u>. Other examples of physiological mechanisms include those we use for sleeping and regulate body temperature.
Answer: b. Light independent
Explanation: Photosynthesis is a process where carbohydrtes are formed with energy from the sunlight, in cianobacteria, algae and plants. This process has two steps:
- The first step are light dependent reactions where sunlight excites chlorophyll molecules and electrons are transport through photosystems. In this step, NADPH and oxygen are produced.
- The second step are light independent reactions called Calvin cycle, where CO2 is fixated to form carbohydrates using NADPH as energy source.