Homework Answers
24---->(A)
25--->(B)
26--->(C)
27---->(A)
28--->(B)
29--->(A)
30---->(A)
31--->(A)
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24. Similarity resulting from common ancestry is known as a) homology b)...
no explaination is needed 21. Iodine deficiency promotes the formation of enlarged thyroid glands (goitre) because...
no explaination is needed
21. Iodine deficiency promotes the formation of enlarged thyroid glands (goitre) because a) more thyroid hormones are now produced in the thyroid gland. b) the thyroid gland switches to production of a different hormone. e) reduced levels of thyroid hormones fail to prevent stimulation of thyroid gland by TRH and TSH. d) iodine now needs to be synthesized in the thyroid gland. 22. An unequal distribution of ions inside and outside of a nerve cell is...
no explaination is needed, I will give a thump for sure 31. Which of the following...
no explaination is needed, I will give a thump for sure
31. Which of the following are obligate intracellular pathogens a) Antibiotics b) Viruses c) Probiotics d) Thermophilic bacteria 29. When an electrical impulse arrives at a chemical synapse, neurotransmitters are released. These act by a) opening ion channels in the postsynaptic membrane. b) opening ion channels in the presynaptic membrane. c) increasing the ion concentration in the synaptic cleft. d) physically connecting pre- and postsynaptic membranes. 2. Which of...
no explaination is needed 22. Rising blood sugar levels will Icad to a) increasing insulin production....
no explaination is needed
22. Rising blood sugar levels will Icad to a) increasing insulin production. b) decreasing insulin production. c) increasing insulin degradation. d) no change in insulin levels. 23. Which type of cells form the myelin sheaths around axons? a) Schwann cells b) Astrocytes c) Adjacent nerve cells d) Muscle cells 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 25. The...
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...
no explaination is needed 24. Which of the following statements concerning the loss of hind limbs...
no explaination is needed
24. Which of the following statements concerning the loss of hind limbs during whale evolution is NOT true? a) The loss is well documented by a series of transitional fossils. b) It explains why modern whales have vestigial pelvic girdies. c) This evolutionary process involved changes in the sequence or expression of Hox genes. d) The loss of limbs by snakes is a similar adaptation to a similar environment. 25. Developmental genes are a) usually highly...
KEY TERMS March the numbered form with the definition that is it be definition the responding...
KEY TERMS March the numbered form with the definition that is it be definition the responding sumber in front of the appropriate 40. excitatory postsynaptic potential 21. resting potential 22 on leakage channels 23. equilibrium potential -24 graded potential 25. gated ion channels 26. depolarization 27. hyperpolarization Sensory neurons 2. central nervous system 3. motor neurons 4. intercurons 5. peripheral nervous system 6. somatic motor neurons *7. autonomic motor neurons 8. sympathetic 9. parasympathetic 10. cell body all dendrites 12....
The Nat -k* pump uses the energy of Nat moving down its concentration gradient to pump...
The Nat -k* pump uses the energy of Nat moving down its concentration gradient to pump k up its concentration gradient. Answers A-B A True B False Voltage-gated Na* channels exist in three distinct conformations in axons because Answers A-D A they assume an inactivated conformation shortly after opening, which ensures that the action potential cannot move backwards toward the cell body. B they change conformation when binding Nat and transporting it to the opposite side of the membrane before...
hat is the best description of pulmonary blood flow? A) low flow, high pressure C) high flow, low pressure B) low...
hat is the best description of pulmonary blood flow? A) low flow, high pressure C) high flow, low pressure B) low flow, low pressure D) high flow, high pressure Vhich of the following is the skeletal muscle reflex responsible for preventing excessive tension in the uscle due to overcontraction? A) joint capsule receptors C) Golgi tendon organs B) muscle spindle fibers D) autonomic reflex Vhich of the following stimulates the cells of the adrenal medulla to secrete its excitatory hormones?...
causes the sarcoplasmic retieatum of skeletal musele cells to release calcium onto the sarcomere: what he...
causes the sarcoplasmic retieatum of skeletal musele cells to release calcium onto the sarcomere: what he movement of tropomyosin off of the binding site of actin the binding of acetyleholine with its receptor the binding of caleium with troponin he movement of the action potential down the T-tubal the binding of ATP to the Ca-ATPase on the sarcoplasmic reticulum "Rigor Mortis" is caused b a. the inability of the myosin head to detach from actin b. a lack of calcium...
Why is there not a resting membrane potential in autorhythmic cells? A) The Cat+ channels open too early B) The Kt...
Why is there not a resting membrane potential in autorhythmic cells? A) The Cat+ channels open too early B) The Kt channels are not finished closing when the Cat+ channels open C) The lf channels are open when repolarization ends D) The lf channels are not open when depolarization begins Which cells secrete renin in response to low blood pressure? A) granular cells C) myogenic cells B) macula densa cells D) tubulorenal cells What is the MAIN reason intercalated disks...
no explaination is needed
21. Iodine deficiency promotes the formation of enlarged thyroid glands (goitre) because a) more thyroid hormones are now produced in the thyroid gland. b) the thyroid gland switches to production of a different hormone. e) reduced levels of thyroid hormones fail to prevent stimulation of thyroid gland by TRH and TSH. d) iodine now needs to be synthesized in the thyroid gland. 22. An unequal distribution of ions inside and outside of a nerve cell is...
no explaination is needed, I will give a thump for sure
31. Which of the following are obligate intracellular pathogens a) Antibiotics b) Viruses c) Probiotics d) Thermophilic bacteria 29. When an electrical impulse arrives at a chemical synapse, neurotransmitters are released. These act by a) opening ion channels in the postsynaptic membrane. b) opening ion channels in the presynaptic membrane. c) increasing the ion concentration in the synaptic cleft. d) physically connecting pre- and postsynaptic membranes. 2. Which of...
no explaination is needed
22. Rising blood sugar levels will Icad to a) increasing insulin production. b) decreasing insulin production. c) increasing insulin degradation. d) no change in insulin levels. 23. Which type of cells form the myelin sheaths around axons? a) Schwann cells b) Astrocytes c) Adjacent nerve cells d) Muscle cells 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 25. The...
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...
no explaination is needed
24. Which of the following statements concerning the loss of hind limbs during whale evolution is NOT true? a) The loss is well documented by a series of transitional fossils. b) It explains why modern whales have vestigial pelvic girdies. c) This evolutionary process involved changes in the sequence or expression of Hox genes. d) The loss of limbs by snakes is a similar adaptation to a similar environment. 25. Developmental genes are a) usually highly...
KEY TERMS March the numbered form with the definition that is it be definition the responding sumber in front of the appropriate 40. excitatory postsynaptic potential 21. resting potential 22 on leakage channels 23. equilibrium potential -24 graded potential 25. gated ion channels 26. depolarization 27. hyperpolarization Sensory neurons 2. central nervous system 3. motor neurons 4. intercurons 5. peripheral nervous system 6. somatic motor neurons *7. autonomic motor neurons 8. sympathetic 9. parasympathetic 10. cell body all dendrites 12....
The Nat -k* pump uses the energy of Nat moving down its concentration gradient to pump k up its concentration gradient. Answers A-B A True B False Voltage-gated Na* channels exist in three distinct conformations in axons because Answers A-D A they assume an inactivated conformation shortly after opening, which ensures that the action potential cannot move backwards toward the cell body. B they change conformation when binding Nat and transporting it to the opposite side of the membrane before...
hat is the best description of pulmonary blood flow? A) low flow, high pressure C) high flow, low pressure B) low flow, low pressure D) high flow, high pressure Vhich of the following is the skeletal muscle reflex responsible for preventing excessive tension in the uscle due to overcontraction? A) joint capsule receptors C) Golgi tendon organs B) muscle spindle fibers D) autonomic reflex Vhich of the following stimulates the cells of the adrenal medulla to secrete its excitatory hormones?...
causes the sarcoplasmic retieatum of skeletal musele cells to release calcium onto the sarcomere: what he movement of tropomyosin off of the binding site of actin the binding of acetyleholine with its receptor the binding of caleium with troponin he movement of the action potential down the T-tubal the binding of ATP to the Ca-ATPase on the sarcoplasmic reticulum "Rigor Mortis" is caused b a. the inability of the myosin head to detach from actin b. a lack of calcium...
Why is there not a resting membrane potential in autorhythmic cells? A) The Cat+ channels open too early B) The Kt channels are not finished closing when the Cat+ channels open C) The lf channels are open when repolarization ends D) The lf channels are not open when depolarization begins Which cells secrete renin in response to low blood pressure? A) granular cells C) myogenic cells B) macula densa cells D) tubulorenal cells What is the MAIN reason intercalated disks...
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