A person who is often tired and has frequent colds makes a New Year's resolution to eat more foods with molecules that can store energy and protect against infection. Which dietary component will this person increase?
A. Fiber
B. Fats
C. Proteins
D. Carbohydrates
Answer: C
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As a result of playing tennis in the summer heat without proper hydration, you have become very dehydrated. You are now in hypernatremia, a condition where your blood sodium levels are too high. Your brain tells you to drink water and, as a result, your blood sodium and hydration levels go back to normal. This illustrates
A) positive feedback. B) stimulus reinforcement. C) negative feedback. D) diagnostic regulation. E) both positive and negative feedback loops.
Describe calcium's role in the contraction of the sarcomere in skeletal and cardiac muscle tissues. Include the following in your answer : sarcomere, myosin, actin, myosin-binding sites, cross bridge, sarcoplasmic reticulum, ATP, ADP and Pi, troponin, tropomyosin, and Ca2+ channels
What will be an ideal response?
Which type of transport proteins use cell energy to move molecules across the plasma membrane?
A. Cadherins B. Ligand-gated ion channels C. Leak-ion channels D. ATP-powered pumps
Providing strength and moving materials within the cell is a function of the filaments and
A) ribosomes. B) microfilaments. C) intermediate filaments. D) flagella. E) microtubules.