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24 Cards in this Set
- Front
- Back
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Please give a specific example of negative feedback
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Homeostatic Regulation of blood pressure.
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What role does the octet rule play in the chemical reactions among the atoms commonly found in living organisms?
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Because under the right conditions two or more atoms can interact in ways that produce a chemically stable arrangement of eight valence electrons for each atom.
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What are Enzymes and why are they important?
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Catalytic protein molecules. They are highly specific, very efficient, and subject to a variety of cellular controls.
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Name a membrane based component and describe its role
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Carbohydrates are a source of chemical energy for generating atp in metabolic reactions.
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What is the importance of Osmosis?
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Because without the water being able to go in and out of cells our cells would die.
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Give an example of homeostasis
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The body's ability to maintain proper hydration levels.
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Name the four types of tissues and give an example of each.
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Epithelial - Thyroid Gland/ Simple Squamos
Connective - Adipose tissue Muscular - Smooth Muscle Nervous - Nuerons |
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State two functions of the skin, briefly describing how each works
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Thermoregulation - regulation of body temperature
Protection - Keratin protects underlying tissue from microbes, abrasions, heat and chemicals. |
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Distinguish the axial skeleton from the appendicular.
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Axial is 80 bones of mid region
Appendicular is 126 and consists of the limbs and girdles |
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What is the sliding filament model of skeletal muscle contraction?
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It shows that the skeletal muscles shorten during contraction because the thick and thin filaments slide past each other.
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Define a motor unit
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A motor neuron together with the muscle fibers it stimulates.
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Describe the difference in your biceps when you use muscle to lift a 4 pound weight vs a 2 pound.
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There is more muscle contraction because the muscles are working a little harder to pick up the heavier weight.
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Give at least one feature that distinguishes among the three major types of muscle fiber: skeletal, cardiac, smooth
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Skeletal - Attached to tendons
Cardiac - Form wall of the heart Smooth - located in hollow organs |
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what is the difference between erythrocytes and leucocytes.
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erythrocytes - mature red blood cell
Leucocytes - White blood cells |
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Why is it unwise to transfuse a person with type A blood with blood from a person with type B?
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Because it can cause binding of Anti-B antibodies and the donors B antigens Causing agglutination and hemolysis of the red blood cells
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Why is the left ventricle more muscular than the right?
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Because the left pumps blood towards the entire body and the right pumps only towards the lungs
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Identify the three pacemakers of the heart and the relative rates.
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Body Temp, Age, Gender
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Where can you find the Metarteriole? and what is its function?
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Towards the capillary junction and it monitors the blood flow into the capillary.
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What is the source of the lymph and what roles does the lymphatic system play in homeostasis?
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Blood plasma and it helps defend the body from disease causing agents.
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Why does a continuously contracted muscle fatigue more quickly than one that alternately contracts and relaxes/
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Because of the lack of oxygen and nutrients.
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Other than the heart what part of the circulatory system has a major role in regulating arterial blood pressure?
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Arterioles help regulate blood pressure because this is where the greatest pressure drop occurs
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What is the difference between anatomical residual volume and functional residual volume?
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in males anatomical is 1200 ml and functional is double that
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Why do people who suffer heart attacks complain about breathing?
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Emotional distress can often lead to difficulty breathing
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Why is carbon dioxide so dangerous?
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It depletes bloods ability to carry oxygen, which then suffocates the victim.
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