Please answer all five multiple choice questions! i will give a thumbs up! 2015 BIOLOGY 24.The...
Please answer all five multiple choice questions! i will give a thumbs up!
2015 BIOLOGY
24.The concentration difference of ions across the membrane is maintained by
a) Na+ ion channels.
b) the Na+ K+ pump.
c) K+ channels.
d) Cl- channels
30. Developmental genes are
a) usually highly variable.
b) never expressed.
c) usually highly conserved.
d) found mainly in the mitochondrial genome.
2014
17. When the beta cells of the pancreas release insulin into the blood,
a) the blood glucose levels rise to a set point and stimulate glucagon release.
b) the skeletal muscles and the adipose cells take up glucose at a faster rate.
c) the liver catabolizes glycogen.
d) the alpha cells of the pancreas release glucose into the blood.
18. Oestradiol is an example of
a) an androgen.
b) an oestrogen.
c) a progestin.
d) a catecholamine.
20. After the depolarization phase of an action potential, the resting potential is restored by
a) the opening of sodium activation gates.
b) the opening of voltage-gated potassium channels and the closing of sodium channels.
c) a decrease in the membrane's permeability to potassium and chloride ions.
d) a brief inhibition of the sodium-potassium pump.
Homework Answers
24) The correct answer is b) Na+K+ pumps.
30) The correct answer is c) usually highly conserved.
17) The correct answer is b) the skeletal muscles and adipose cells take up glucose at faster rate.
18) The correct answer is b) an oestrogen.
20) The correct answer is b) the opening of voltage gated potassium channels and the closing of sodium channels.
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Please answer all five multiple choice questions! i will give a
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2015 BIOLOGY
24.The...
no explaination is needed 14. If two species of seed-eating finch colonized an island on which...
no explaination is needed
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Please help me with several of these questions, thank you very much. 1. During the propagation...
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Please answer all five multiple choice questions, i will give a thumbs up! 2014 BIOLOGY 21....
Please answer all five multiple choice questions, i will give a thumbs up! 2014 BIOLOGY 21. What is one advantage of budding as a form of reproduction in animals? a) It allows the species to survive long periods of unsuitable environmental conditions. b) It increases genetic variability in the species. c) It allows rapid colonisation of a favourable environment. d) It allows the species to get rid of harmful mutations. 22. In animals where females bear the greater burden of...
Multiple Choice Which of the following statements about action potentials is incorrect? During an action potential,...
Multiple Choice Which of the following statements about action potentials is incorrect? During an action potential, the efflux of K ions causes the inside of cells to become more positive (depolarized). B) When critical threshold is reached an action potential is triggered C) Voltage gated channels are required to reach critical threshold D) Sodium ions diffuse across the membrane to cause depolarization. E) K ions continue to efflux after resting membrane is reached to cause repolarization
Efer Figure2 to answer questions 18-21: 8. produce the myelin sheaths of neurons in the central F...
efer Figure2 to answer questions 18-21: 8. produce the myelin sheaths of neurons in the central Figure 2 nervous system. 19 form the Blood Brain Barrier 20._ are responsible for neurotransmitter release. 21 have ligand gated ion channels that are activated by neurotransmitters 22. Functionally, which cellular location is the neuron's "decision- making site" as to whether or not an action potential will be initiated? A axonal membrane B. axon hillock C. dendritic membrane D. presynaptic membrane 23. Calcium and...
There can be multiple answers for a single question. Thank you! 26. SST inhibits the release...
There can be multiple answers for a single question. Thank you!
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Section 1 Answer the multiple-choice questions 1-46 on the scantron. 1. Rapid impulse conduction from "node" to "node" (node of Ranvier) is called: A) spatial propagation. B) salt...
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For each multiple choice question shade the letter of the alphabet of the appropriate answer on the scan sheet. Two...
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***I need help on PART E of this problem. All of the information is given on...
***I need help on PART E of
this problem. All of the information is given on the worksheet
along with the hints on each part. Thank you!
The post-synaptic cell at a chemical synapse has the following distribution of ions between the cytosol and the extracellular environment. Consider that the relative permeabilities for Na, K and Cl' are 1, 100 and 50, and that there are no other significant permeabilities, lon Concentration (in mM) Extracellular Equilibrium potential mV) Intracellular 146...
no explaination is needed
14. If two species of seed-eating finch colonized an island on which there were seeds of only one size, what would Gause's principle of competitive exclusion predict? a) The finches would hybridize and become one species. b) One finch would evolve smaller beaks and the other would evolve larger beaks. c) One of the finch species would probably disappear from the island. d) The plants would evolve seeds of different sizes. 15. Which of the following...
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efer Figure2 to answer questions 18-21: 8. produce the myelin sheaths of neurons in the central Figure 2 nervous system. 19 form the Blood Brain Barrier 20._ are responsible for neurotransmitter release. 21 have ligand gated ion channels that are activated by neurotransmitters 22. Functionally, which cellular location is the neuron's "decision- making site" as to whether or not an action potential will be initiated? A axonal membrane B. axon hillock C. dendritic membrane D. presynaptic membrane 23. Calcium and...
There can be multiple answers for a single question. Thank you!
26. SST inhibits the release of A GHRH BIGF-1 C GH D none of the above are 27. Parathyroid Hormone is released when blood levels of A. Ca... high BClow C. glucose...high D. glucose...low 28. A decrease in plasma concentration of parathyroid hormone will lead to A. decreased Car reabsorption by the kidneys B. decreased absorption of Cam by the intestine C. decreased resorption of Ca' by bones D....
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Hormones are usually transported through and affect only cells with 1) A) intercellular junctions cell junctions C) blood vessels... specific receptors B) ducts... .specific receptors D) blood vessels... cell junctions 2) Hormones regulate 2) A) reproduction only B) growth, only C) metabolism, only D) Growth, reproduction, and metabolism are regulated by hormones. 3) Steroid hormones 3) A) usually difuse through the plasma membrane into...
Section 1 Answer the multiple-choice questions 1-46 on the scantron. 1. Rapid impulse conduction from "node" to "node" (node of Ranvier) is called: A) spatial propagation. B) saltatory propagation. C) divergent propagation. D) synaptic transmission. E) continuous propagation. 2. Nerve cells control skeletal muscles by using A) the cranial nerves only B) plasma cells C) the spinal nerves only D) electrical impulses E) none of the above 3. The term "voltage regulated" channels means that the membrane ion channels open...
For each multiple choice question shade the letter of the alphabet of the appropriate answer on the scan sheet. Two marks will be given for a correct choice and zero mark will be given for an incorrect choice or no answer. 1. The force of cardiac contraction increases in response to a) an increased filling volume b) inhibition of cardiomyocyte L-Type (slow) Ca2 channels c activation of carotid baroreceptors d) activation of the myocardial muscarinic receptors e) Both a) and...
***I need help on PART E of
this problem. All of the information is given on the worksheet
along with the hints on each part. Thank you!
The post-synaptic cell at a chemical synapse has the following distribution of ions between the cytosol and the extracellular environment. Consider that the relative permeabilities for Na, K and Cl' are 1, 100 and 50, and that there are no other significant permeabilities, lon Concentration (in mM) Extracellular Equilibrium potential mV) Intracellular 146...
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