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What 2 things in inside leaf help in gaseous exchange
Examine THREE physical benefits of doing regular exercise?
Suppose a pigeon that is homozygous for the grouse allele mates with a heterozygous pigeon. What is the expected frequency of the homozygous no grouse genotype in the offspring?
which route is taken by air passing from the lungs of a human to the atmosphere
Task: Create a diagram showing the feedback mechanism of the following scenarios.
Carbon Dioxide. When we exercise our muscles give off carbon dioxide as a waste product. This increases in the level of carbon dioxide in the blood. Receptors in the carotid arteries sense the change in carbon dioxide and send a message to the brain. The brain will stimulate the lungs to increase respiration. This will lower the amount of carbon dioxide in the blood
Task: Create a diagram showing the feedback mechanism of the following scenarios.
Blood pressure. In the example of blood pressure increasing, receptors in the carotid arteries detect the change in blood pressure and send a message to the brain. The brain will cause the heart to beat slower and thus decrease the blood pressure. Decreasing heart rate has a negative on blood pressure.
Task: Create a diagram showing the feedback mechanism of the following scenarios.
Homeostasis of Temperature (hot). If the environment gets hot, we often sweat to keep from getting too hot. Shivering and sweating are homeostatic mechanisms of maintaining a constant temperature.
Task: Create a diagram showing the feedback mechanism of the following scenarios.
Homeostasis of Temperature (cold). Our bodies try to maintain a constant temperature close to 98.6 F or 37 C. If the environment gets cold, we often shiver to get warm. This is an automatic response to maintaining temperature.
Which of the following features of a system is unlikely to lead to a stable homeostatic system?
c. Redundancy
a. Negative feedback
d. Complexity
b. Positive Feedback
Which of the following strategies would not help restore a high body temperature to normal?
b. Sweating
c. Flattening of skin hair
a. Non-Shivering thermogenesis
d. Redistribution of blood flow to the periphery
Which of the following statements regarding blood pressure is not true?
c. Blood pressure is regulated by the renin-angiotensin-aldosterone pathway.
b. Blood pressure varies throughout the cardiac cycle.
d. Blood pressure can be altered by adrenaline.
a. Blood pressure is constant throughout the body.
Which of the following statement about Homeostasis is incorrect________________
c. Because of this the fluctuations of internal environment are of extremely narrow range as compared to that of external environment
a. There is a definite control system that regulates the homeostatic activities
b. Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment
d. All are correct
Which of the following statements best describes homeostasis?
b. dynamic equilibrium
a. Keeping the body in a fixed and unaltered state.
c. Maintaining a near-constant internal environment.
d. Altering the external environment to accommodate the body's needs
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