Homework Answers
Active transport requires energy and membrane proteins in order to function properly.
Bacteria is not an eukaryote. It is a prokaryote.
A neuron has many short thin fibres called dendrites and a single long axon.
Bacteria can be described as prokaryotic and single-celled.
Thyroid secretes hormones (T3 and T4).
Hormones are secreted by glands and carried by bloodstream.
Diffusion across a membrane does not require energy.
Lungs remove carbon dioxide.
Sweating and vasodilation would be signaled to cause a decrease in temperature.
Active transport differs from passive transport in that active transport requires energy.
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Active transport requires and in order to function correctly. • A. nucleic acids, membrane proteins e...
Match the macromolecule categories with their correct function: lipids, carbohydrates, nucleic acids, proteins functions: 1. energy...
Match the macromolecule categories with their correct function: lipids, carbohydrates, nucleic acids, proteins functions: 1. energy source - cell markers 2. inheritance - protein synthesis 3. energy source - hormones - chemical signals 4. enzymes - channels - structural support
Which type of membrane transport protein can perform either passive or active transport? Choose one: A....
Which type of membrane transport protein can perform either passive or active transport? Choose one: A. transporters B. channels C. both channels and transporters D. Neither type of membrane transport protein can perform both passive and active transport.
A correct distinction between facilitated diffusion and active transport of a substance across a biological membrane...
A correct distinction between facilitated diffusion and active transport of a substance across a biological membrane is that . . . A. active transport requires conformational changes in the transport protein associated with the transport process, and facillitated diffusion does not. B. active transport requires integral membrane protein to carry out the transport, and facillitated diffusion does not. C. facilitated diffusion depends on an existing energy gradient acting on the transported substance, while active transport makes such a gradient. D....
21. Which property has not been observed for membrane proteins? a. energy storage b. transport of...
21. Which property has not been observed for membrane proteins? a. energy storage b. transport of substances into and out of the cell catalysis (enzymatic activity) acting as a receptor c. d. 22. In the fluid mosaic model of membrane structure the proteins are specifically bonded to the lipids b. a. the proteins "float" in the lipid bilayer the proteins are sandwiched between the lipid molecules c. d. the lipids are sandwiched between the protein molecules 23. All steroids contain...
What is the critical difference between passive and active transport? A. passive requires energy but active...
What is the critical difference between passive and active transport? A. passive requires energy but active does not B. passive requires no energy, but active does C. passive and active each require energy, but passive requires less What is an enzyme? A. a protein that facilitates a reaction B. a protein that supplies water for hydrolysis reactions C. a protein that absorbs water during dehydration reactions The First Law of Thermodynamics states: A. energy can be changed from one form...
Question 1 of 10 10 Points Which of the following secretes hormones? • O A. Hypothalamus...
Question 1 of 10 10 Points Which of the following secretes hormones? • O A. Hypothalamus • B. Thyroid • O C. Liver • D. Appendix Reset Selection Signals from the brain and spinal cord going to muscles and glands go through • • • A. Motor neurons B. Sensory neurons C. Hypothalamus • OD. Receptors A junction between neurons through which electrical signals pass through are known as . A. Synapses B. Axons • O C. Neurotransmitter D. Myelin...
47. Active transport of solutes is mediated by and in plant and animal cells, respectively A....
47. Active transport of solutes is mediated by and in plant and animal cells, respectively A. H-pump and Ca-pump B. K-pump and Ca-pump C. Na-pump and H'-pump D. H-pump and Na"-pump E. C & D 48. One is NOT TRUE about integral membrane proteins. A. They can move inside the lipid bilayer B. Their hydrophobic amino acid side chains face the lipid bilayer C. Their hydrophilic amino acids form the hydrophilic pore D. They can easily by separated from the...
In secondary active transport, the sodium iodide transporter moves iodide into the thyroid gland from the...
In secondary active transport, the sodium iodide transporter moves iodide into the thyroid gland from the blood plasma. It cotransports one I- for every two Na+ ions. In mammals, this protein is found predominantly in the thyroid gland, but also in salivary glands, kidneys, gastric mucose, ovaries, and, importantly, in mammary glands, where it is responsible for uptake of iodide into milk, delivering this important element needed to make thyroid hormones. The point of this process is the ACTIVE transport of iodide. Where...
QUESTION 20 Both passive transport and active transport A. require solutes to be transported down their...
QUESTION 20 Both passive transport and active transport A. require solutes to be transported down their concentration gradients. B. can concentrate solutes on one side of a membrane. C. require ATP-driven protein pumps. D. None of these answers are correct E. require proteins to facilitate transport.
Pre-Lecture Quiz, Chapter 7, Introduction to Cell Physiology True/False . Active transport requires energy to move...
Pre-Lecture Quiz, Chapter 7, Introduction to Cell Physiology True/False . Active transport requires energy to move substances against the concentration gradient. 2. The cell membrane contains all of the genetic material necessary for cell reproduction. The mitochondria produce energy in the form ATP. Passive transport can occur across any semipermeable membrane and does not 3. 4. require energy 5. An isotonic solution contains the same concentration of solutes as human plasma Fill in the Blank 1. The is the basic...
Which type of membrane transport protein can perform either passive or active transport? Choose one: A. transporters B. channels C. both channels and transporters D. Neither type of membrane transport protein can perform both passive and active transport.
21. Which property has not been observed for membrane proteins? a. energy storage b. transport of substances into and out of the cell catalysis (enzymatic activity) acting as a receptor c. d. 22. In the fluid mosaic model of membrane structure the proteins are specifically bonded to the lipids b. a. the proteins "float" in the lipid bilayer the proteins are sandwiched between the lipid molecules c. d. the lipids are sandwiched between the protein molecules 23. All steroids contain...
Question 1 of 10 10 Points Which of the following secretes hormones? • O A. Hypothalamus • B. Thyroid • O C. Liver • D. Appendix Reset Selection Signals from the brain and spinal cord going to muscles and glands go through • • • A. Motor neurons B. Sensory neurons C. Hypothalamus • OD. Receptors A junction between neurons through which electrical signals pass through are known as . A. Synapses B. Axons • O C. Neurotransmitter D. Myelin...
47. Active transport of solutes is mediated by and in plant and animal cells, respectively A. H-pump and Ca-pump B. K-pump and Ca-pump C. Na-pump and H'-pump D. H-pump and Na"-pump E. C & D 48. One is NOT TRUE about integral membrane proteins. A. They can move inside the lipid bilayer B. Their hydrophobic amino acid side chains face the lipid bilayer C. Their hydrophilic amino acids form the hydrophilic pore D. They can easily by separated from the...
QUESTION 20 Both passive transport and active transport A. require solutes to be transported down their concentration gradients. B. can concentrate solutes on one side of a membrane. C. require ATP-driven protein pumps. D. None of these answers are correct E. require proteins to facilitate transport.
Pre-Lecture Quiz, Chapter 7, Introduction to Cell Physiology True/False . Active transport requires energy to move substances against the concentration gradient. 2. The cell membrane contains all of the genetic material necessary for cell reproduction. The mitochondria produce energy in the form ATP. Passive transport can occur across any semipermeable membrane and does not 3. 4. require energy 5. An isotonic solution contains the same concentration of solutes as human plasma Fill in the Blank 1. The is the basic...
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