Hair cells are mechanoreceptors that open an ion gate. Because this gate lets _________ into the...
Hair cells are mechanoreceptors that open an ion gate. Because this gate lets _________ into the cell, it is important that the extracellular fluid is rich in ____________.
Homework Answers
Because this gate lets ion into the cell , it is important that the extracellular fluid is rich in sodium
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Hair cells are mechanoreceptors that open an ion gate. Because
this gate lets _________ into the...
Animal cells often have more potassium ions (K+) inside the cells than in the extracellular fluid....
Animal cells often have more potassium ions (K+) inside the cells than in the extracellular fluid. Explain how those cells acquire potassium. State if energy was required to move the ion and the route of the ion into the cell.
22. How are hair cells in the inner ear depolarized? (A) Mechanically-gated K channels open. (B)...
22. How are hair cells in the inner ear depolarized? (A) Mechanically-gated K channels open. (B) Voltage-gated Na channels open. (C) Voltage-gated Cap channels open. (D) Cat-activated Cl channels open. 23. Phase locking is used for sound frequencies up to around 1000 Hz. At higher frequencies, tonotopy is used. The note "concert pitch A", or 440 Hz, is commonly used to tune instruments in an orchestra or musical ensemble. If an instrument is playing concert pitch A, how fast are...
Changes in K+ ion concentrations are often dangerous. Simply doubling the concentration of K+ in the...
Changes in K+ ion concentrations are often dangerous. Simply doubling the concentration of K+ in the extracellular fluid, can lead to death. Which of the following choices correctly explains why deviations in K+ concentrations can be lethal? Select one: a. Excess K+ in the ECF diminishes the electrochemical gradient for K+ to leak out of the cell. As fewerk leave the cell, the resting membrane potential become more positive and is more likely to depolarize. b. Excess K+ in the...
Question 86 Eukaryotic cells are able to trigger the release of material from secretary vesicles (Regulated...
Question 86 Eukaryotic cells are able to trigger the release of material from secretary vesicles (Regulated exocytosis) to the extracellular space using a process called exocytosis. An example of materials commonly released by this way is Ahormones nucleic acids sugars D. cytosoli proteins Question 87 Formation of disulphide bonds occur only in the ER True False Question 88 А Which of the intermediate filaments are present in every type of cell (except red blood cells) in the animal body? Keratin...
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...
1.The flat worm (Planeria) represents a key stage of evolution of the nervous system because... a.The...
1.The flat worm (Planeria) represents a key stage of evolution of the nervous system because... a.The receptor cells, ganglion cells, and effector muscle cells are contained within the external epithelium b.the muscle cells have become integrated into the skeletal system for movement c.the inner layer of the mouth funnel of the Laminaria has the ganglion cell deep to the surface epithelium d.the ganglia are localized outside of the esophagus altogether 2.Which of the following genes has evolved selectively for cold...
1.The flat worm (Planeria) represents a key stage of evolution of the nervous system because... a.The...
1.The flat worm (Planeria) represents a key stage of evolution of the nervous system because... a.The receptor cells, ganglion cells, and effector muscle cells are contained within the external epithelium b.the muscle cells have become integrated into the skeletal system for movement c.the inner layer of the mouth funnel of the Laminaria has the ganglion cell deep to the surface epithelium d.the ganglia are localized outside of the esophagus altogether 2.Which of the following genes has evolved selectively for cold...
21. The fluid in blood vessels and the Interstitial space is referred to as: a. The...
21. The fluid in blood vessels and the Interstitial space is referred to as: a. The extracellular fluid compartment b. Plasma c. The Intracellular fluid compartment 22. Why is the resting cell membrane more permeable to K+ than to Na+? a. Because gated K+ channels are always open. b. Because K+ can diffuse through the phospholipid bilayer of the resting cell membrane and Na+ cannot. c. Because the cell membrane contains Leak (ungated) K+ Channels. 23. Lipid soluble molecules, carbon...
22-25 and Essay 22. The epidermis a) is classified as pseudostratified columnar epithelium b) allows uncontrolled...
22-25 and Essay
22. The epidermis a) is classified as pseudostratified columnar epithelium b) allows uncontrolled water loss from the body c) might include keratinocytes, melanocytes, Merkel cells and Langerhans cells d) All the above (a, b and c) are correct 23. Cartilage a) does not contain blood vessels b) is highly negatively charged because of sugars and sulfate groups attached to sugars e) absorbs large amounts of water which acts as a "shock absorber when pressure is applied to...
25. A woman runs a marathon in 30°C weather and replaces all volume lost in sweat by drinking dis...
25. A woman runs a marathon in 30°C weather and replaces all volume lost in sweat by drinking distilled water. After th A) decreased total body water (TBW) B) decreased haematocrit C) decreased intracellular fluid (ICF) volume e marathon, she will have decreased plasma osmolarity increased intracellular osmolarity 26. Which of the following ions has a higher concentration in intracellular fluid (ICF) than in extracellular fluid (ECF)? C1 D) HC03 E) Ca2+ 27. One gram of mannitol was injected into...
22. How are hair cells in the inner ear depolarized? (A) Mechanically-gated K channels open. (B) Voltage-gated Na channels open. (C) Voltage-gated Cap channels open. (D) Cat-activated Cl channels open. 23. Phase locking is used for sound frequencies up to around 1000 Hz. At higher frequencies, tonotopy is used. The note "concert pitch A", or 440 Hz, is commonly used to tune instruments in an orchestra or musical ensemble. If an instrument is playing concert pitch A, how fast are...
Changes in K+ ion concentrations are often dangerous. Simply doubling the concentration of K+ in the extracellular fluid, can lead to death. Which of the following choices correctly explains why deviations in K+ concentrations can be lethal? Select one: a. Excess K+ in the ECF diminishes the electrochemical gradient for K+ to leak out of the cell. As fewerk leave the cell, the resting membrane potential become more positive and is more likely to depolarize. b. Excess K+ in the...
Question 86 Eukaryotic cells are able to trigger the release of material from secretary vesicles (Regulated exocytosis) to the extracellular space using a process called exocytosis. An example of materials commonly released by this way is Ahormones nucleic acids sugars D. cytosoli proteins Question 87 Formation of disulphide bonds occur only in the ER True False Question 88 А Which of the intermediate filaments are present in every type of cell (except red blood cells) in the animal body? Keratin...
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...
21. The fluid in blood vessels and the Interstitial space is referred to as: a. The extracellular fluid compartment b. Plasma c. The Intracellular fluid compartment 22. Why is the resting cell membrane more permeable to K+ than to Na+? a. Because gated K+ channels are always open. b. Because K+ can diffuse through the phospholipid bilayer of the resting cell membrane and Na+ cannot. c. Because the cell membrane contains Leak (ungated) K+ Channels. 23. Lipid soluble molecules, carbon...
22-25 and Essay
22. The epidermis a) is classified as pseudostratified columnar epithelium b) allows uncontrolled water loss from the body c) might include keratinocytes, melanocytes, Merkel cells and Langerhans cells d) All the above (a, b and c) are correct 23. Cartilage a) does not contain blood vessels b) is highly negatively charged because of sugars and sulfate groups attached to sugars e) absorbs large amounts of water which acts as a "shock absorber when pressure is applied to...
25. A woman runs a marathon in 30°C weather and replaces all volume lost in sweat by drinking distilled water. After th A) decreased total body water (TBW) B) decreased haematocrit C) decreased intracellular fluid (ICF) volume e marathon, she will have decreased plasma osmolarity increased intracellular osmolarity 26. Which of the following ions has a higher concentration in intracellular fluid (ICF) than in extracellular fluid (ECF)? C1 D) HC03 E) Ca2+ 27. One gram of mannitol was injected into...
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