We lack awareness of many of our bodies' systems for maintaining homeostasis. The sensations, movements, and secretions of organs such as the heart and intestines are governed by the
A. autonomic nervous system.
B. somatic nervous system.
Answer: A
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Metabolic rate can be measured with a respirometer that measures
A. water content of the breath in order to directly measure the products of cellular respiration. B. water content of the breath in order to indirectly measure the products of cellular respiration. C. temperature of the expired air in order to measure the rate of the sum of all reactions within the body. D. oxygen consumption in order to indirectly measure heat production and energy expenditure. E. temperatures of carbon dioxide and oxygen to determine how much the body warmed the respiratory gas.
The three major groups of proteins, in order from most abundant to least abundant are the ________, _________, and ____________
Fill in the blank(s) with correct word
A group of cells was treated with a proteolytic (protein-digesting) enzyme. Which of the following processes would be least affected by this treatment?
A. Diffusion of Na+ through membrane channels B. Diffusion of lipid-soluble molecules through the plasma membrane C. Use of carrier molecules in facilitated diffusion D. Secondary active transport E. Sodium-potassium exchange pump
When light strikes a photoreceptor it
A. hyperpolarizes and releases less neurotransmitter. B. hyperpolarizes and releases more neurotransmitter. C. deporlarizes and releases more neurotransmitter. D. depolarizes and releases less neurotransmitter.