(1 mark) Activity 2: Examining the Effect of Vagus Nerve Stimulation Results: Briefly describe what happened when you electrically stimulated the vagus nerve. (2 marks) Question 2: Explain how possible mechanisms of vagal escape would differ in an isolated heart preparation such as the one used in this experiment versus a heart in a live animal/human. (3 marks) Activity 3: Examining the Effect of Temperature on Heart Rate Results: Provide the heart rate values recorded when the heart was bathed with Ringer’s solution of different temperatures. (2 marks) Question 3: Homeothermic animals such as humans have a thermoneutral zone (i.e., a range of external environmental temperatures) in which internal body temperature remains at a constant level while simultaneously maintaining metabolic rate (i.e., energy expenditure) constant. If the environmental temperature drops below the thermoneutral zone, humans can still keep
Figure 4a shows data on REACTION RATE vs. the effects of enzyme inhibition experiment. The enzyme did not work with the inhibitor. 5) DISSCUSION Our hypothesis was that while trying to determine the optimum temperature for peroxidase the enzyme was going to denature or that the enzyme activity was going to increase at 60°C. Based on our results we concluded that it was a moderate inhibitor because as the temperature increased the reaction rate (absorbance) also increased instead of decreasing. For the effect of the pH on the peroxidase we did think that the pH5 was going to have the greatest amount of absorbance because it reacted well and it had the most enzyme.
In order to get more oxygen into your body and into your blood to flow to those muscles, you have to take in more oxygen through breathing. The same process occurs when you sweat. When you exercise, your body’s temperature increases, and in attempt to cool you off, your sweat glands the effectors are activated. Consequently the body temperature increases with exercise, the actual time spent 'producing heat' is actually quite short. when the body is too hot ie the blood vessels leading to the skin capillaries dilate, known as vasodilation.
| | | | | Selected Answer: | is inhibited by alcohol | Answers: | increases urine production | | promotes dehydration | | is produced in the adenohypophysis | | is inhibited by alcohol | | | | | * Question 3 1 out of 1 points | | | Normal development of the immune response is due in part to hormones produced by the ________. | | | | | Selected Answer: | thymus gland | Answers: | adrenal medulla | | pancreas | | thyroid gland | | thymus gland | | | | | * Question 4 1 out of 1 points | | | Figure 15.1 Using Figure 15.1, match the following: Storehouse for the hormones produced by the hypothalamus of the brain. | | | | | Selected Answer: | B | Correct Answer: | | Evaluation Method | Correct Answer | Case Sensitivity | Exact Match | B | | | | | | | * Question 5 1 out of 1 points | | | Gluconeogenesis occurs in the liver due to the action of ________. | | | | | Selected Answer: | cortisol | Answers: | aldosterone | | insulin | | secretin | | cortisol | | | | | * Question 6 1 out of 1 points | | | Figure 15.1 Using Figure 15.1, match the following: Produces hormones and is considered a neuroendocrine organ. | | | | | Selected Answer: | A | Correct Answer: | | Evaluation Method | Correct Answer | Case Sensitivity | Exact Match | A | | | | | | | * Question 7 1 out of 1 points | | | Figure 15.2 Using Figure 15.2, match the following
When we do intense workouts our ratio increases about 1.0, thus making our bodies work anaerobically (this means without O2). When your R.Q. is high that means our bodies are burning more carbohydrates and less fat. In turn, if you are trying to lose weight and it’s not coming off it could be because your R.Q. is too high.
Biological Approach | PY1 PY1 | Model answers for biological approach | Sumi Prasobh AS Level | 1a) Outline two assumptions of the biological approach (4 marks) One assumption of the biological approach is that our personalities and behaviors are biologically determined. Lab research found that we’re a product of our brain structure. The balance of neurotransmitters, such as dopamine and adrenaline has directly been found to affect our mood, thoughts and personalities. For example Hans Selye found that both humans and animals are biologically determined to react in the same predictable way to the threat of a stressor for aiding survival. Another assumption is that certain regions of the brain determine certain behaviors.
Jordan Rehbock BMK 50 Marketing Final Executive Summary Doggles is the new way of protecting the eyes of our dogs. With Doggles, our objective is to ensure the eye health of all dogs, big and small. With Doggles UV protection and protective casing, exercising with your dog is a fear of the past. Doggles encourages a healthy lifestyle for dogs and owners alike. Doggles encourage an active life style, and can ensure that no eyes will be harmed in the process.
Titration report Purpose Vitamin C, Ascorbic acid, is one of the essential nutrients for human or animal body systems. Most animals can produce ascorbic acid inside the body by themselves but some animals like humans have to take ascorbic acid from outside of the body. We know ascorbic acid provides a lot of benefits inside of the body. Some the examples of the benefits are below; - It raises the immunity - It is cure for the common cold - It fixes tension and the grain of the skin - It makes the combination of the skin organization harder and stronger - It softens stress - It lowers a cholesterol level - It reduces aging affects, eye disease, skin wrinkling and cardiovascular diseases. For humans, the daily intake of ascorbic acid is between 70 to 90mg from foods like vegetables, fruits and juice.
If the body rises above the optimum temperature your cells cannot maintain healthy cellular function and would become denatured. Receptors pick this negative feedback up and send a message through the sympathetic nervous system to flatten the hair on your body to increase conductivity, it causes the sweat glands to secrete liquid which evaporates of your body to cool you down and it causes your capillaries to rise to the surface of your skin to radiate heat to help cool the body down. All of this help to regulate your body’s temperature to maintain good cellular function therefore maintaining healthy functioning of the body. Homeostasis is
Negative feedback is where various receptors and effectors cause a reaction to ensure certain conditions remain the same. It is an automatic, corrective mechanism within the body. An example of negative feedback is temperature control. If the blood temperature rises, a ‘heat gain’ centre in the brain sends nerve impulses to the skin, which causes vasodilation and sweating, which will cool down the blood. If the blood temperature falls, it stimulates a ‘heat loss’ centre in the brain which sends impulse to the skin, causing vasoconstriction and the cessation of sweating.