Laboratory Assignment 1 1. Describe a negative – feedback mechanism in terms of receptor, control center and effector. Give an example of a negative – feedback mechanism in the body. 2. Describe positive feedback. Why are positive – feedback mechanisms generally harmful? Give one example each of a harmful and a beneficial positive – feedback mechanism in the body.
3. Describe the anatomical position. Why is it important to remember the anatomical position when using directional terms?
4. Define and give an example of the following directional terms: inferior, superior, anterior, posterior, dorsal, ventral, proximal, distal, lateral, medial, superficial and deep. 5. A bullet enters the left side of male, passes through the left lung, and lodges in the heart. Name in order the serous membranes and the cavities through which the bullet passes.
Point All statements below are true, EXCEPT: An enzyme can only bind to one substrate, known as specificity Without enzymes, the breakdown of our food would occur too slowly to sustain life. An enzyme can bind to hundreds of different substrates and catalyze a reaction Enzymes are not part of a chemical reaction; they only facilitate the reaction 1 point The enzymes in the digestive tract are intracellular, making it difficult to study them in a test tube (in vitro) True False
One great way to learn the function of cellular structures is to create an analogy or metaphor between the cell and its structures and another type of large organization that you already know about…. any large organization that relies on lots of smaller parts to each do their jobs so that the larger organization can function.
So, take a minute to think about an analogy that works for you. Is your cell a hospital? If so, what job in the hospital is like the job the ribosome does? Is your cell a city? If so, what job in a city is like the job the plasma membrane does? In the space below please create an analogy for each of the cell structures you’ve learned – tell me how it’s role is like a job someone does “in the real world”.
I would appreciate some peer reviewed articles if you can provide.
Identify the phospholipid bilayer structures below by matching the structure to the tagged letter on the image. *Letter’s K \& L refer to the Hydrophobicity and Hydrophilicity of the phospholipid bilayer.
Explain the following CLIA-waived urine tests. Urine pregnancy test Ovulation test Urine toxicology
Many systems of the body change during the transition from a resting state to submaximal aerobic exercise. Describe what happens to heart rate, total peripheral resistance, ventilation and muscle oxygen consumption, comparing resting values to those measured during submaximal exercise (1/4mark each). Include in your answer the relationship between these variables (1 mark).
Determine which of the following bones each letter in the above picture refers to: Humerus, Radius, Ulna, Carpal, Metacarpal, Phalanges bones been altered?) 3) Hypothesize why this animal’s limb has evolved to have this anatomy. Draw upon what we have talked about concerning the lever dynamics.
The synthesis of glycogen from many molecules is an reaction. glucose, endergonic glucose, exergonic amino acids, exergonic artino acids, endergonic Question 8 In the below reaction, the underlined portion of the reaction is a reaction. Glucose+ATP→Glucose-6-P+ADP Note that we are not focusing on the ATP molecule here. endergonic exergonic
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