The receptor cells for hearing are located in the _______.
The receptor cells for hearing are located in the _______.
Homework Answers
In the inner ear two main structures are present: Cochlea and semicircular canals.
Cochlea is responsible for hearing and semicircular canal is responsible for maintenance of balance.
Inside the cochlea there is a sensory receptor for hearing which is known as 'organ of corti'. When the ear ossicles transform sound waves and causes vibrations in the ear drum, these vibrations are being transferred through the cochlear fluid to the organ of corti which contains tiny hair cells. These hair cells act as mechanoreceptors and thus convert the vibrations into the nerve impulses which are carried through 8th cranial nerve up to the central nervous system.
For hearing specifically... 1. What is/are the receptors? 2. How does the receptor work? 3. How...
For hearing specifically... 1. What is/are the receptors? 2. How does the receptor work? 3. How does info from the receptor(s) get to the brain? 4. Where in the brain does it go? 5. What happens in the brain?
Which is a difference between hearing and equilibrium? One uses the vestibulocochlear nerve, and the other...
Which is a difference between hearing and equilibrium? One uses the vestibulocochlear nerve, and the other does not. One is stimulated by fluid movements in the cochlea, and the other is stimulated by movements in the vestibular apparatus. O One has receptor cells in the inner ear, and the other has receptor cells in the middle ear. O One uses mechanoreceptors, and the other uses sound receptors.
Question 3: . I In some breast cancers, the cancerous cells express the receptor for progesterone....
Question 3: . I In some breast cancers, the cancerous cells express the receptor for progesterone. Progesterone's structure is shown below. When progesterone is present, the progesterone receptor acts like a transcription factor and enhances the transcription of many genes, including c-myc. c-myc makes a protein that promotes cell division. Imagine that in some of these cancers the progesterone receptor has mutated so that it does not o require progesterone to bind to DNA. A. Is the progesterone receptor located...
True or False: Chimeric antigen receptor (CAR) T cells are cells that have been retrovirally transduced...
True or False: Chimeric antigen receptor (CAR) T cells are cells that have been retrovirally transduced with a tumor- specific T-cell receptor in order to treat a leukemia.
1 points SA Liver cells and smooth muscle cells both possess the BP-adrenergic receptor. Activation of...
1 points SA Liver cells and smooth muscle cells both possess the BP-adrenergic receptor. Activation of this receptor by circulating adrenaline leads to glycogen breakdown in a liver cell and relaxation in a smooth muscle cell. These different outcomes following interaction with the same initial stimulus can be traced to different intracellular proteins that become engaged in the response in these two types of cells. True False
4. Draw the structure of a functional antigen receptor on T cells. (1.0)
4. Draw the structure of a functional antigen receptor on T cells. (1.0)
Knowing that FAS death receptor was activated in cholesterol depleted cancer cells. Explain how activation of...
Knowing that FAS death receptor was activated in cholesterol depleted cancer cells. Explain how activation of this receptor activates killer caspases. Explain all downstream events after activation of death receptor and stopping with how activation of execution caspases occurs.
(4 pts) A sample of cells has a total receptor concentration of 25 mM. Ninety percent...
(4 pts) A sample of cells has a total receptor concentration of 25 mM. Ninety percent of the receptors have bound ligand and the concentration of free ligand is 125 PM. What is the Kd for the receptor-ligand interaction?
A sample of cells has a total receptor concentration of 24 μM, and 35% of the...
A sample of cells has a total receptor concentration of 24 μM, and 35% of the receptors are occupied with ligand. The concentration of free ligand is 10 μM. Calculate Kd. { Kd = [R][L]/[R·L]}.
The CCR5 protein is a receptor molecule on the surface of white blood cells. HIV gains...
The CCR5 protein is a receptor molecule on the surface of white blood cells. HIV gains entry to the CD4 cells through this receptor. A certain mutant allele of the gene for this receptor is called Δ32. Heterozygotes for this gene have reduced susceptibility to HIV and delayed onset of AIDS while homozygotes for CCR5Δ32 are resistant to HIV infection. Homozygotes with ‘normal’ CCR5 alleles are susceptible to HIV infection. You sample people from several different populations and report the...
Which is a difference between hearing and equilibrium? One uses the vestibulocochlear nerve, and the other does not. One is stimulated by fluid movements in the cochlea, and the other is stimulated by movements in the vestibular apparatus. O One has receptor cells in the inner ear, and the other has receptor cells in the middle ear. O One uses mechanoreceptors, and the other uses sound receptors.
Question 3: . I In some breast cancers, the cancerous cells express the receptor for progesterone. Progesterone's structure is shown below. When progesterone is present, the progesterone receptor acts like a transcription factor and enhances the transcription of many genes, including c-myc. c-myc makes a protein that promotes cell division. Imagine that in some of these cancers the progesterone receptor has mutated so that it does not o require progesterone to bind to DNA. A. Is the progesterone receptor located...
1 points SA Liver cells and smooth muscle cells both possess the BP-adrenergic receptor. Activation of this receptor by circulating adrenaline leads to glycogen breakdown in a liver cell and relaxation in a smooth muscle cell. These different outcomes following interaction with the same initial stimulus can be traced to different intracellular proteins that become engaged in the response in these two types of cells. True False
4. Draw the structure of a functional antigen receptor on T cells. (1.0)
(4 pts) A sample of cells has a total receptor concentration of 25 mM. Ninety percent of the receptors have bound ligand and the concentration of free ligand is 125 PM. What is the Kd for the receptor-ligand interaction?
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