Movement of a substance down its concentration gradient from high concentration to low c) Proteins in the plasma membrane acting as carrier molecules d) A substance moving from outside to inside a cell across the plasma membrane Question 13 Mammalian sperm sex cell expends a large amount of energy in moving through the female reproductive tract. On the basis of this information you would predict that these cells would contain a large amount of: a) Vacuoles b) Mitochondria c) Ribosomes
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the carbon dioxide in a strong exhalation‚ before filling their lungs with fresh water and diving beneath the surface of the water again. With this type of respiration comes a problem‚ where large lungs full of air would hinder the whale stability to dive very deep depths. Therefore‚ the size of a whales lungs are actually smaller in proportion to its body‚ and the amount the amount of air that they contain is less than expected. The nitrogen contained in the
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Measuring haemodynamic variables using different techniques and examining the effects of diving reflex‚ isometric muscle contraction and psychological stress on these variables. Introduction Haemodynamics is the study of factors that determine the movement of blood (Widmaier et al‚ 2011). The main haemodynamic factors are heart rate and blood pressure. Heart rate is defined as the number of times the heart contracts per minute. Normal resting heart rate in adults ranges between 60 – 100 beats
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Research shows that fish respond to painful stimuli in a manner that is not just a simple reflex. In the article “Hooked on a Myth” by Victoria Braithwaite‚ biologists say “We shouldn’t be so quick to believe that fish don’t feel pain.” The Standing Committee of the European Convention for the Protection of Animals Kept for Farming Purposes explains‚ "The skin of the fish is the first line of defence against disease and provides protection from the environment. It contains sensory receptors for touch
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eat my heart alone‚ Nor feed with sighs a passing wind: What profit lies in barren faith‚ And vacant yearning‚ tho’ with might To scale the heaven’s highest height‚ Or dive below the wells of Death? What find I in the highest place‚ But mine own phantom chanting hymns? And on the depths of death there swims The reflex of a human face. I’ll rather take what fruit may be Of sorrow under human skies: ’Tis held that sorrow makes us wise‚ Whatever wisdom sleep with thee. In In Memoriam‚
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Labouring in Water This essay is a reflection of the pool birth I witnessed whilst out on my practical placement. The elements of my experience in this area that I will be reflecting on are the advantages and disadvantages of birthing in the pool and the communication between the midwife and the expectant mother. I have chosen this area to reflect on because I would like to feel confident in promoting pool birthing and I would like to be able to support and provide correct advice for a woman considering
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Chapter 9: The Eye * Light is electromagnetic energy that is emitted in form of waves; waves crash into objects and are absorbed‚ reflected‚ scattered‚ and bent * Half of human cerebral cortex is involved with analyzing visual world * MAMMALIAN VISUAL SYSTEM: begins with eye‚ back of eye is retina (contains photoreceptors specialized to convert light energy to neural activity) * Eyes have features to track moving objects and keep transparent surface clean (i.e. by tears) * Each
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Exam: 46.4‚45‚47‚48 Lecture outline for the zoology unit revised 2010 Introduction to animal form & function and regulation of TB (ch. 40 & Concept 42.4) This first reading assignment reviews 5 major principles re living organisms: 1. Physical laws & the environment constrain the size & shape of organisms. 2. Form & function are correlated at all levels of organization. 3. Chemical energy in food is used to sustain form & function. 4. Many animals (& other organisms) regulate
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2. At a party‚ Dickson was challenging his friends to see who could hold their breath and dive longest in the pool. Hoping to extend his time underwater‚ Dickson hyperventilates for several minutes before diving into the pool. Shortly after entering the water‚ he lost consciousness and nearly drowned. Explain what might have caused this. Hyperventilation is defined as breathing in excess of the metabolic needs of the body‚ eliminating more carbon dioxide that is produced‚ and consequently‚ resulting
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NPB 101L Final Exam Review Lab 2 – Skeletal Muscle 1. Describe basic setup a. What was manipulated? Intensity‚ frequency b. What was measured? Twitch tensions c. What concepts were investigated? i. Frog‚ sciatic nerve‚ gastroc‚ d. What was investigated? i. Effects of stimulus frequency and intensity on contraction-the more intensity‚ the higher the twitch tension. The more freq- the more twitch tension (By ~4.0pps we start to see summation of the twitches and by ~15pps we see no single twitches
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