Explain the steps that lead to the synthesis and release of cortisol. B. Which of the hormones involved in cortisol release are tropic? C. How is the chemical signal of cortisol received by the target cells? 2.
Axons speak. Neurons transmit messages when stimulated by signals from our senses or when triggered by chemical signals from other neurons. In response to this a neuron fires an impulse called the action potential. When a neuron fires the first section of the axon opens it gates and positively charged sodium ions flood through the cell membrane. This depolarizes that axon section, causing another axon gate to open, and then another, like a line of dominos.
1. Neurotransmitters are released from the pre-synaptic membrane in response to an impulse. 2. They cross the synaptic cleft and attach to post-synaptic receptors. 3.
The variable that affects osmotic pressure is You correctly answered: a. the concentration of nondiffusing solutes. 4. The net movement of water would be into the cell in a You correctly answered: b. hypotonic solution. page 1 Experiment Results Predict Question: Predict Question 1: What effect do you think increasing the Na+ Cl- concentration will have? Your answer : a. increased osmotic pressure Predict Question 2: What do you think will be the pressure result of the current experimental conditions?
As sodium ions attract water, water is also retained which increase blood volume and therefore blood pressure (Marieb & Hoehn, 2012). Fosinopril acts to inhibit the conversion of angiotensin I to angiotensin II by completely blocking the angiotensin converting enzyme (ACE), thus preventing vasoconstriction and water retention and decreasing blood pressure (Allen, 2013). 3. The expected therapeutic response for hydrochlorothiazide is diuresis. Explain how this occurs and how it benefits the patient.
Research Question: How does the adrenaline affect on the heartbeat of daphnia? Thesis: Adrenaline increases the daphnia's heart rate. The hormone circulates through the daphnia's blood and activates cell surface receptors in what is commonly called a pacemaker, or the sinoatrial node, which increases the rate of blood the heart ejects per minute. Noradrenaline, another hormone, and caffeine, a chemical, have the same effect. Apparatus and chemicals: Chemicals: Culture of water flea – Daphnia Chemicals that may affect the heart rate – at low concentrations( in that design that chemical would be adrenaline.
False An isotonic solution for human red blood cells is a D. 0.9% saline solution. The lipid bilayer is permeable to all of the following substances EXCEPT E. amino acids. Epithelial tissue has a high capacity for renewal. True Nonciliated columnar epithelium often contains microvilli and goblet cells. True Which of the following epithelia function in absorption and secretion?
|Reflexes are rapid, predictable, and involuntary responses to stimuli. The components of a reflex arc are structures of CNS and PNS| |and they occur over neural pathways. | 2. Describe the events of an action potential. |The events of an action potential are, sodium ions entering the muscle cell while potassium ions diffuse out of the cell.
Enzymes Abstract Lactase is an enzyme found in the small intestine that breaks down lactoase into the products galactose and glucose. Lactase can be purchased in many forms and one form is the pill form in which people take when they are lactose intolerant. These people lack the enzyme lactase, and cannot break down the sugar lactose into its component parts. Lactose, the sugar found in milk, is a disaccharide composed of glucose and galactose. Sucrose will be also used in the labs.
Chemistry 3/19/13 Calorimetry Lab Report Purpose: Calorimetry is the measurement of the heat flow into or out of a system for chemical and physical purposes. The purpose of this lab was to use calorimetry to find how much heat is absorbed or released when NaCl is dissolved in water. In this case, we will find the heat coming out of the system, in a chemical process. Hypothesis: Once the sodium chloride is put into the water, the temperature of the water will rise. Procedure: 1.