The answer is; Pepsin
Pepsin is first secreted by the chief cells of the stomach wall and the inactive precursor called pepsinogen. When pepsinogen interacts with the acidic environment of the stomach due to hydrochloric acid, it is turned to pepsin. The pepsin breaks down large protein molecules to smaller molecules.
Answer:
The correct answer would be "Adaptive radiation happens over a relatively short time".
Adaptive radiation refers to the process of evolution in which ancestor organisms diversify rapidly into a wide variety or new forms as a result of environmental changes, availability of new resources, availability of new niches, or new challenges.
Accumulation of adaptive radiations over a long period of time results in speciation.
For example, Darwin's finches adapted according to their feeding behavior.
I'm 80% sure that the answer is John B. Watson.
Answer:
The strategies used to treat osteoporosis are as follow:
- A diet based on foods rich in calcium and Vitamin D (e.g., poultry and fresh fruits)
- Regular sun exposure
- Regular physical exercise
Explanation:
Osteoporosis is a prevalent disease in older people that makes bones more fragile/porous, and therefore more likely to suffer breaks. This condition can substantially reduce the quality of life, especially in people aged at least 65 years. Osteoporosis is caused by poor nutrition, i.e., by the lack of foods rich in nutrients, especially rich in calcium and vitamin D (e.g., milk, fresh fruits, etc), which leads to a decrease in bone density. In UAE, it has been shown approximately 70 % of its population suffers from Vitamin D deficiency and calcium deficiency. Exposure to the sun helps the body to synthesize vitamin D, contributing to prevent this disease. Moreover, regular physical activity may improve bone density and therefore reduces the risk of fractures derived from osteoporosis.
Answer:
1-The respiratory system is the network of organs and tissues that help you breathe. It includes your airways, lungs and blood vessels. The muscles that power your lungs are also part of the respiratory system. These parts work together to move oxygen throughout the body and clean out waste gases like carbon dioxide.
2-The fluid represents the outermost layer of the alveolar surface that is directly exposed to air and thus to the environment. Alveolar fluid prevents desiccation of the epithelial cells and also functions as a physical protection barrier against inhaled particles and irritants.
3-The main function of surfactant is to lower the surface tension at the air/liquid interface within the alveoli of the lung. This is needed to lower the work of breathing and to prevent alveolar collapse at end-expiration.
4-The trachea (windpipe) conducts inhaled air into the lungs through its tubular branches, called bronchi. The bronchi then divide into smaller and smaller branches (bronchioles), finally becoming microscopic. The bronchioles eventually end in clusters of microscopic air sacs called alveoli.
5- i havent seen the video then how can i answer q5